- S
- A variable for any distance in the direction of the beam or
for the length of the bunch itself. Distances are measured in the
`Z' direction.
- S
- Siemens.
- S K-XAS
- An imaging technique using low-energy ranges and the element
sulfu r.
- S&E
- Safety and Environmental (ES&H). Also, Scienc and
Engineering.
- S&H
- Safety and Health.
- S&ORIP
- Safety and Operational Reliability Improvements Project.
- S&R
- Shipping and Receiving.
- S-BAND
- 2856 Mhz. The microwave frequency used to accelerate
particles in the LINAC. The wavelength at this frequency is 10.5
cm, or about 4 and 1/8 inches.
- S-BAND Feedback
- A feedback system to lock the beam extraction time from
Damping Ring to an S-BAND (LINAC RF) reference.
- S-SBM
- Strangeness-including Statistical Bootstrap Model
- S/C
- Sub Contract.
- S/CI
- Suspect or Counterfeit Items.
- SA
- A dedicated service supporting higher forward and return
data rates and utilizing the steerable TDRS SA antennas. Unlike
Multiple Access service, which is fixed frequency, SA services
are available within a specified range of S or Ku band
frequencies.
Glast Category: operations
- SA
- Supply Air.
- SAA
- Satellite Accumulation Area.
- SAA
- South Atlantic Anomaly. Anomaly in earth's magnetic field.
- SAA
- | An approximately 560 square kilometer region above South
America and extending approximately 200 to 300 kilometers off the
coast of Brazil in which the van Allen radiation belt makes its
closest approach to the Earth's surface,|
| greatly increasing the radiation intensity at given
altitudes. Satellites passing through the SAA while orbiting the
planet at an altitude of several hundred kilometers at orbital
inclinations between 0 and 60 degrees are exposed to sever|
| al minutes of abnormally high radiation consisting of a
proton bombardment at energies exceeding 10 MeV and a hit rate of
3000 hits per square centimeter per second. The longitudinal and
latitudinal size of the SAA varies depending on alti|
| tude, and on the size of the Earth's magnetic field, which
is largely dependent on solar activity. The SAA also drifts in a
westerly direction about 0.3 degrees per year, a rate close to
the rotation difference between the Earth's core and|
| its surface.|
Glast Category: astronomy
- SAAC
- Scientific and Academic Advisory Committee.
- SABER
- South Arc Beam Experimental Region.
- SAC
- Science Advisory Committee.
- SAC
- SLAC Architectural Committee.
- SACLA
- Spring-8 Angstrom Compact free-electron LAser. (RIKEN,
Japan)
- SAD
- Safety Analysis / Assessment Document.
- SAD
- SLAC Advanced Design Committtee (ca. 1968)
- SAE
- |GLAST-specific data analysis tools.|
Glast Category: astronomy, data processing, SAS
- SAFARI
- Spica FAR-infrared Instrument.
- Safety Barrel
- A cylindrical shield used to protect exposed wires like PLIC
line junctions. It is made of metal and always grounded.
- Safety, Health, and Assurance
- A department within the Environment, Safety, and Health
(ES&H) Division.
- SAG
- Senior Advisory Group. (US)
- SAGE
- Formerly the Soviet-American Gallium Experiment, now
officially named "Russian-American Gallium Experiment", although
the original acronymn has been retained.
- SAGE-S
- SLAC Accelerating Girls' Engagement in STEM.
- SAGENAP
- Special Accelerator Group for Experiments in Non-Accelerator
Physics
- SAIC
- Science Applications International Corporation.
- SAID
- Scattering Analyses Interactive Dialin
- SAL
- Saskatchewan Accelerator Laboratory.
- SALLIE
- Stanford ALL Image Exchange.
- SALT
- Strategic Arms Limitation Treaty
- SALTA
- Snowmass Area Large-scale Time-coincidence Array.
- SAM
- Smart Analog Module. A 32-channel module used to digitize
analog signals. It is used to monitor the LINAC waveguide
temperatures, small magnet currents, and miscellaneous analog
reference signals.
- SAM
- Small Angle Monitor. See also Mini Sam.
- SAM
- Software Asset Management
- SAMMI
- SLC Automatic Magnet Measuring Instrument.
- SAMPLE
- an experiment at MIT-Bates, measuring backward-angle elctron
scattering from hydrogen and deuterium targets.
- SAN
- Department of Energy San Francisco Operations Office.
- SAO
- Smithsonian Astrophysical Observatory.
- SAP
- Scientific Advisory Panel, initiated by Prop. 65. (CCR Title
22, Sec. 12301 et seq)
- SAPE
- SSRL Accelerator Procedures-Engineering.
- SAR
- Supplied Air Respirator.
- SAR
- Safety Analysis Report.
- SARA
- Superfund (CERCLA) Amendments and Reauthorization Act. Title
III of this act created federal community right-to-know program.
See also EPCRA.
- SARA
- Heavy ion facility in Grenoble, France.
- SARA-NIKHEF
- National Center for Computing and Networking Services and
the National Institute for Nuclear Physics and High Energy
Physics, based in the Netherlands.
- SAREC
- SLAC Accelerator Research Experimental Committee.
- SAS
- Science Analysis Software. (GLAST)
- SAS
- Software group responsible for designing and implementing
offline data processing and analysis tools in support of the
Large Area Telescope (LAT).
Glast Category: organization
- SASE
- Self-Amplified Spontaneous Emission.
- SASER
- Acoustic equivalent of a laser.
- SASS
- SLAC Association of Students Seminars.
- SATAN
- Security Administrator Tool for Analyzing Networks.
- SATF
- Self-Assessment Task Force.
- SATIF
- Shielding aspects of Accelerators, Targets and Irradiation
Facilities.
- SATS
- Self-Assessment Tracking System.
- SATURNE II
- Saclay Saturne II proton, charmed meson, and helium nucleus
synchrotron.
- SAURON
- Spectroscopic Areal Unit for Research on Optical Nebulae.
- SAW
- Self-Avoiding Walk
- SAX
- Small-Angle Xray.
- SAXS
- Small-Angle X-ray Scattering
- SB
- Senate Bill.
- SB
- See SBST.
- SB
- Strawman Baseline. (ILC)
- SBBSTR
- SuBbooSTer. An amplifier station where the RF signal coming
from the x6 multiplier is boosted for the klystrons of a LINAC
sector. Subboosters are either klystron tubes or solid state.
- SBC
- Package that controls the final stage of the CPU boot
process. During secondary boot, the CPU operating system is
initialized, FSW modules are loaded, and FSW enters its initial
operating mode.
Glast Category: FSW, package
- SBE
- State Board of Equalization.
- SBI
- SubBooster Interface. A CAMAC module that handles control
and monitoring for each subbooster. It provides the accelerate
and standby triggers to the Subbooster modulators.
- SBIR
- Small Business Innovation Research
- SBK
- Sheet Beam Klystron.
- SBNG
- StarBurst Nucleus Galaxies
- SBSS
- Science Based Stockpile Stewardship
- SBST
- SuBbooSTer. An amplifier station where the RF signal coming
from the x6 multiplier is boosted for the klystrons of a LINAC
sector. Subboosters are either klystron tubes or solid state.
- SC
- Super Computing (as in SC04, SC05, etc.)
- SC
- Super-Conducting.
- SC
- DOE Office of Science (Government organizational code).
- SC
- Safety Collimator.
- SC-TBD
- Secondary Containment - Technical Basis Document.
- SCA
- SuperConformal Algebra
- SCA
- SuperConducting Acceleration. Also, SuperConducting
Accelerator (S tanford University).
- SCA
- Scientific Computing Applications department (SLAC).
- SCADA
- Supervisory Control And Data Acquisition.
- SCAG
- State of California Association of Governments.
- SCALLA
- Structured Cluster Architecture for Low Latency Access.
- Scanning Wire Ion Chamber
- See SWIC.
- SCAP
- Security Content Automation Protocol.
- SCAQMD
- South Coast Air Quality Management District.
- SCAS
- Stanford Contractor Assurance System.
- Scavenger
- See Scavenger Beam.
- Scavenger Beam
- The high-current electron beam sent to the target to produce
positrons. It is called Scavenger because it uses the leftover RF
power after the main collision bunches are accelerated.
- Scavengy
- A multiknob used to tune the energy of the scavenger beam.
This is done by varying the phase of Suboosters 17 and 18.
- SCBA
- Self-Contained Breathing Apparatus.
- SCC
- Serial Crate Controller. A camac module driving an
individual crate and used to interface between the serial link
multibus and the CAMAC modules in that crate.
- SCCDPH
- Santa Clara County Department of Public Health.
- SCCS
- Scientific Computing and Computing Services.
- sCDM
- standard Cold Dark Matter
- SCDMS
- Super Cryogenic Dark Matter Search
- SCET
- Soft Collinear Effective Theory.
- SCFF
- Super Conducting Final Focus.
- SCFT
- SuperConformal Field Theory
- SCGF
- DOE Office of Science (SC) Graduate Fellowship program.
- SCGSR
- DOE Office of Science (SC) Graduate Student Research
program.
- SciDAC
- Scientific Discovery through Advanced Computing.
- ScienceTools
- Toolkit of analysis software tools with a wrapper bundling
it into a single package. These tools are developed and used for
analysis of Level 1 data. Energies, directions, times, and other
high-level characteristics of the Gamma- rays are used together
with pointing and livetime information for the LAT to detect and
characterize astrophysical sources of Gamma- rays.
Glast Category: software, SAS, package
- Scintillator
- A type of detector that makes use of the flash of light
emitted by the electrons in an excited atom falling back to their
normal energy or `ground' state after having been excited by a
passing particle. Used in conjunction with a photomultiplier to
produces a measurable current for each `scintillation.' The most
common scintillator material is plastic.
- SCIP
- Stanford Center for Information Processing.
- SCIPP
- Santa Cruz Institute for Particle Physics.
- SCL
- Safety Check List.
- SCM
- SuperConducting Magnet
- SCM
- Supply Chain Management.
- SCOAP3
- Sponsoring Consortium for Open Access Publishing in Particle
Physi cs.
- SCORM
- Sharable Content Object Reference Model.
- SCP
- SLC Control Program (Pronounced SKIP). The process running
the COWs and other consoles when they are controlling the SLC
machine. Each console can be operated under its own SCP program.
- SCP
- Site Characterization Plan.
- SCPD
- Stanford Center for Professional Development
- SCR
- Silicon Controlled Rectifier. A solid-state electronic
switch which holds off voltage until its gate lead is pulsed,
which then causes conduction until the device is back biased, or
zero biased. SCRs are used frequently as the main rectifiers in
large, variable current, regulated power supplies.
- Scraper
- See Collimator.
- SCRF
- SuperConducting RadioFrequency.
- SCROD
- School Cosmic Ray Outreach Detector.
- SCS
- SLAC Computing Services.
- SCSC
- Scientific Computing Steering Committe.
- SCSI
- Small Computer System Interface.
- SCSS
- SPring-8 Compact SASE Source (Japan).
- SCT
- Superconducting Triplets. The superconducting quadrupoles in
Final Focus.
- SCT
- SemiConductor Tracker.
- SCUBA
- Submillimeter Common User Bolometer Array.
- SCVPGM
- Sagittal focusing and converging beam
- SD
- Schwinger-Dyson.
- SD
- Silicon Detector.
- SD
- Surface Detector (Auger Observatory).
- SD
- Sextupole Defocusing.
- SDC
- Solenoidal Detector Collaboration (SSC)
- SDE
- Schwinger-Dyson Equations
- SDF
- Sludge-Derived Fuel.
- SDG
- SelfDual Gravity
- SDI
- State Disability Insurance.
- SDI
- Strategic Defense Initiative.
- SDL
- Subbooster Drive Line. The Rf line from any given subbooster
to the 8 klystron modulator stations in the particular sector it
drives.
- SDLC
- Serial Data Link Controller.
- SDLC
- System Development LifeCycle. Also Software Development
LifeCycle.
- SDLCQ
- Supersymmetric Discrete Light Cone Quantization
- SDM
- Software Development and Maintenance.
- SDMP
- injector Spectrometer DuMP. (SLAC)
- SDN
- Science Data Network. (DOE)
- SDO
- Solar Dynamics Observatory.
- SDOHS
- State Department of Health Services, California. It is also
known as CDHS, DHS, and DOHS.
- SDP
- Permanent Sextupole - Defocusing.
- SDR
- South Damping Ring.
- SDR
- System Design Review.
- SDS
- Status Display Summary. An MCC display that shows the
operational status of various SLC devices.
- SDS
- SLAC Design Services.
- SDSL
- Symmetric Digital Subscriber Line. A technology that allows
high volumes of data, up to 3Mbps, to be sent over existing
conventional copper telephone lines.
- SDSS
- Sloan Digital Sky Survey.
- SDSS-II
- Sloan Digital Sky Survey-II.
- SDWA
- Safe Drinking Water Act. (Federal)
- SEAB
- Secretary of Energy Advisory Board (DOE).
- SEABA
- Science Education Academy of Bay Area
- Search Reset
- A PPS status obtained after a search and needed to put a PPS
area in `No Access' mode. Search reset buttons are located
outside the PPS gates except for the BSY and the LINAC. The
search team leader must press a searched zone's search reset
button at the same time that a similar button is depressed at MCC
in order to get `search status set' for any given zone, so that
the `No Access' state can be achieved for that zone, and beam
brought through the zone.
- SEC
- SECtor.
- SecCM
- Security-focused Configuration Management.
- SECO
- SEcondary Engine Cutoff. (NASA)
- Secondary
- A class of subsignal names in the VAX SLC database. Each
primary signal can have up to 255 secondaries or subsignals.
- Secondary Emission Monitor
- See SEM.
- Secondary Treatment
- The second step in most publicly owned waste treatment
systems in which bacteria consume the organic parts of the waste.
It is accomplished by bringing together waste, bacteria, and
oxygen in trickling filters or in the activated sludge process.
This treatment removes floating and settleable solids and about
90 percent of the oxygen-demanding substances and suspended
solids. Disinfection is the final stage of secondary treatment.
See Primary Waste Treatment and Tertiary Treatment.
- Security Crash
- A PPS incident which occurs when the PPS security of the
machine is lost. It may be caused by a person opening a secured
door to a searched zone, or by an electrical failure in the PPS
system.
- SED
- Stream EDitor. A powerful unix command for modifying the
information in a pipeline.
- SED
- Spectral Energy Distribution.
- SEDAC
- Safety and Environmental Discussion Assistance Committee
- SEDP
- Safety and Environmental Discussion Program.
- SEE
- Satellite Energy Exchange.
- Seeman Screen
- Profile Monitor screens at the end of the LINAC in sector 29
and 30. The beam is deflected by pulsed kickers on to these
screens. Named after their designer, John Seeman.
- SEET
- SLAC Ergonomic Evaluation Team.
- SEGUE
- Sloan Extension for Galactic Understanding and Exploration.
- SEIS
- Supplemental Environmental Impact Statement.
- SEIU
- Service Employees International Union.
- SELEX
- SEgmented LargE X baryon spectrometer.
- SEM
- Secondary Emission Monitor. The SEMs are thick metal plates
insulated from ground. When struck by a beam, these devices
produce a shower of electrons from the plate. The plate then
becomes positive and a signal is extracted to the BCS racks.
- SEM
- Scanning Electron Microscope.
- SEM
- Site Engineering and Maintenance.
- SEN
- Secretary of Energy Notice.
- Sensitizer
- A substance which produces an allergic reaction.
- SEP
- SSRL Enhancement Project
- SEP
- SEPtum.
- SEPT
- SEPTum magnet.
- Septa
- Plural of Septum.
- Septum
- A magnet incorporating a partition with a strong field on
one side and little or no field on the other. It is used in
combination with a kicker to bend one beam while leaving another
undisturbed, usually in order to inject and/or extract a beam
from a storage ring. it can be either a vertical or horizontal
bend. See Lambertson.
- Septum Bump
- An orbit bump created around a septum magnet to move the
beam path into the `no field' area of a septum. Septum bumps are
usually four magnet bumps, which allow control of the beam's
angle as well as its offset through the septum area.
- SERA
- SLAC Emergency Relief Association.
- SERC
- State Emergency Response Commission. (EPCRA)
- SERC
- Science and Engineering Research Council.
- SERG
- Science and Engineering Research Group (SU Libraries).
- Serial Crate Controller
- See SCC.
- SERPUKHOV
- SERPUKHOV proton synchrotron (76 GeV/c Plab).
- SERPUKHOV UNK
- SERPUKHOV multi-TeV proton machine.
- SERT
- SLAC Emergency Response Team.
- Server
- A computer that shares its resources, such as printers and
files, with other computers on the network. An example of this is
a Network Files System Server which shares its disk space with a
workstation that does not have a disk drive of its own.
- SESAME
- Synchrotron-light for Experimental Science and Applications
in the Middle East.
- SETI
- Search for Extraterrestrial Intelligence. (Institute)
- SETL
- A magnet parameter indicating the settling time for a power
supply to stabilize after a change. A SLC VAX secondary.
- seu
- A single event upset (SEU) is a change of state caused by
ions or electro-magnetic radiation striking a sensitive node in a
micro-electronic device, such as in a microprocessor,
semiconductor memory, or power transistors.
The state change is a result of the free charge created by
ionization in or close to an important node of a logic element
(e.g. memory 'bit').
The error in device output or operation caused as a result of
the strike is called an SEU or a soft error.
The SEU itself is not considered permanently damaging to the
transistor's or circuits' functionality unlike the case of single
event latchup (SEL), single event gate rupture (SEGR), or single
event burnout (SEB).
These are all examples of a general class of radiation
effects in electronic devices called single event effects.' (from
Wikipedia, http://en.wikipedia.org/wiki/Single-event-upset)
Glast Category: hardware operations spacecraft, hardware, operations, spacecraft
URL: http://en.wikipedia.org/wiki/Single_event_upset
- SEXT
- SEXTupole. A six-pole magnet used to eliminate chromatic
aberrations in a beam transport system.
- Sextupole
- See SEXT.
- SF
- Schroedinger functional
- SF
- Sextupole Focusing.
- SFF
- South Final Focus.
- SFG
- Spectrometer Facilities Group.
- SFM
- CERN split-field magnet.
- SFMP
- Surplus Facilities Management Program of Strategic
Facilities Master Plan.
- SFR
- Star Formation Rate.
- SFS
- Spent-Fuel Standard
- SFT
- Super Fixed Target beauty Facility. Competing with other B
factory ideas, SFT proposed using a 20Tev proton beam to measure
CP violation at the SSC Laboratory. The SFT proposal was turned
down in review.
- SFT
- Permanent Sextupole - Focusing.
- SG
- Sine-Gordon
- SG
- Safety Glasses, with wide shield, or Safety Goggles.
- SGD
- Soft Gamma-ray Detector. One of the planned components of
ASTRO-H.
- SGM
- Superon Graviton Model.
- SGML
- Standard Generalized Markup Language. A system for
organizing and tagging elements of a document. See also XML.
- SGR
- Soft Gamma Repeater
- SGR
- |An astronomical object that emits large bursts of Gamma-
rays and X-rays at irregular intervals. It is conjectured that
they are a type of magnetar or, alternatively, neutron stars with
fossil disks around them.|
Glast Category: astronomy
- SHA
- Safety, Health and Assurance. (Dept in ES&H)
- SHAB
- Second Harmonic AfterBurner. (LCLS)
- SHALA
- Stanford Health and Lifestyle Assessment.
- SHAM
- Sample and Hold Module.
- SHAP
- Supplemental Housing Allowance Program.
- SHB
- SubHarmonic Buncher. The bunching system after the CID gun
that groups the electrons into the two bunches needed by SLC. The
two SHB (178.5 MHz) are subharmonics (1/16 of S-Band) of the
LINAC RF frequency. It incorporates the following: A) A magnetic
mirror to protect the gun, B) Ten solenoids to maintain the beam
through the pipe and inhibit the spiralling of the electrons, C)
two subharmonic bunchers in which the bunching is accomplished
through velocity modulation using a standing wave resonator and
two cavities.
- SHCDM
- Super-Hubble Cold Dark Matter.
- SHDM
- Super-Heavy Dark Matter.
- SHF
- SLAC Hybrid Facility photon collaboration.
- SHM
- Safe Hold Mode.
- SHMET
- SHeet METal.
- Shower
- Any multiplicative radiation effect whereby a particle
`creates' two or more particles, each of which creates two or
more, etc. causing a `shower' of radiation from a few initial
particles. Also, a cascade of particles generated by pair
production and bremsstrahlung radiation.
- SHPO
- State Historic Preservation Office. (California)
- SI
- System Integrator. (Computing)
- SIAD
- Stanford Internal Audit Department.
- SIAM
- Summary Interlock and Alarm Module
- SIB
- Storage Interface Board.
- Siberian Snake
- A term coined by Y.S. Derbenev and A. Kondralenko at the
Institue of Nuclear Physics in Novosibirsk, the Siberian Snake is
a device to be inserted into the lattice of a circular
accelerator to preserve the polarization of a proton beam during
the acceleration process.
- SIC
- Standard Industrial Classification.
- SID
- SLAC Institutional Database.
- SiD
- Silicon Detector concept for the ILC.
- SID #
- SLAC Institutional Database Number. A number given to every
employee, contractor, or other worker at SLAC. Formerly called
the BinKey (during SLAC's mainframe days).
- SIDIS
- SemiInclusive Deep Inelastic Scattering.
- SIEM
- Security Incident and Event Monitoring. (Computing)
- Sierra Monitor
- A computerized hazardous gas analyzing station with 16
multiplexed input channels and a printer. It is used to monitor
oxygen deficiency in the pit and in the NRTL cryogenics system.
- Sieve Collimator
- A special collimator used in CID to control beam current.
The collimator has four or five holes with various diameters and
can be rotated for a desired aperture. Two of the apertures have
multiple small holes like a sieve, allowing from ten percent to
33 percent of the beam to get through.
- SIGM
- Serpukhov CERN-IHEP magnetic spectrometer (SIGMA).
- Sigma
- A statistical parameter referring to the standard deviation
of a distribution where `one sigma' means one standard deviation
away from the median (the square root of the variance). It is
used for a bunch of particles approximated to a normal, or
Gaussian distribution. For a normal distribution, 68 percent of
the particles are within `one sigma,' 95 percent are within `two
sigmas' and 99.7 percent within `three sigmas.' In a storage
ring, the aperture should be at least eight sigmas for reasonable
lifetimes.
- Sigma
- The size (section) of a beam, assuming that the bunch shape
is gaussian and limited to one sigma.
- Sigma Matrix
- A matrix description of the phase space distribution of a
beam.
- Sigma Phi
- The vertical angular divergence at the IP.
- Sigma Theta
- Horizontal Angular divergence at the IP.
- Sigma X
- The transverse size of the beam in the X, or horizontal
direction.
- Sigma Y
- The transverse size of the beam in the Y, or vertical
direction.
- Signal Words
- The words used on a pesticide label--`Danger,' `Warning,'
`Caution'--to indicate the level of toxicity of the chemicals.
- Signal-to-Noise Ratio
- When used in reference to Usenet activity, `signal-to-noise
ratio' describes the relation between amount of actual
information in a discussion, compared to their quantity. More
often than not, there is substantial activity in a newsgroup, but
a very small number of those articles actually contain anything
useful.
- Signature
- The small, usually four-line message at the bottom of a
piece of E-mail or a Usenet article. In Unix, it is added by
creating a file `.signature' in the user's home directory. Large
signatures are a no-no.
- SII
- SLAC Improvement Initiative.
- SIIS
- Simulator used to test LAT/Spacecraft interface.
Glast Category: hardware
- SIL
- Safety Integrity Level.
- SILI
- Silicon detector.
- Silicon Controlled Rectifier
- See SCR.
- SIMES
- Stanford Institute for Materials and Energy Sciences.
(Formerly XL AM).
- SIMP
- Strongly Interacting Massive Particle
- Simple Mail Transfer Protocol
- See SMTP.
- Simple Network Management Protocol.
- See SNMP.
- Simple Timing Buffer
- See STB.
- SIMPLE 2000
- Superheated Instrument for Massive ParticLE searches
- Single Beam Dumper
- A pulsed magnet in the 51 or 52 line that kicks the beam to
a dump. Used to dump the beam whenever the arcs are not ready.
Some MPS trips cause the Single Beam Dumper to fire.
- SINGS
- SIRTF / Spitzer Infrared Nearby Galaxies Survey.
- Singularity
- a point with infinite density where space-time is infinitely
curved; a boundary or edge to space-time.
- SINQ
- Swiss Spallation Neutron Source (Paul Scherer Institute)
- SIOP
- Serial Input -- Operating Parallel.
- SIP
- Summary Information Process. A database primary.
- SIP
- State Implementation Plan. (from CAA)
- SiPIN
- Silicon Positive-Intrinsic-Negative photodiodes.
- SiPM
- Silicon PhotoMultiplier.
- SIPRI
- Stockholm international Peace Research Institute.
- SISE
- Summer Internships in Science and Engineering. See ERULFs.
- SISGR
- Single-Investigator and Small-Group Research. (DOE)
- SISSA
- Scuola Internatizionale Superiore du Studi Avanzati.
(Trieste, Ita ly)
- SIT
- South Injection Tunnel. The positron transport line going
from the BSY to PEP. Also: South Injection Transport.
- SIT
- Saitama Institute of Technology. (Japan)
- SIT
- System Integration Test. (OCIO)
- SITE
- Superfund Innovative Technology Evaluation Program. (from
CERCLA)
- SITN
- Stanford Instructional Television Network. Operated through
the Stanford Center for Professional Development (SCPD). SCPD
broadcasts over 250 Stanford courses every year. It is available
at SLAC in the Learning Room in the Library. Current schedule
available at
http://scpd.stanford.edu/ce/schedules/currentsched.html
- SIU
- LAT CPU that physically interfaces with the Spacecraft
through a 1553 hardware communications interface and discrete
signal lines. FSW installed on the SIU is responsible for
handling exchange of telecommands and telemetry wi th the
Spacecraft: for overall control functions: for configuration of
the LAT detector: and, for Gamma-ray Burst monitoring.
Glast Category: hardware
- SiW
- Silicon tungsten group (ILC).
- SIXA
- SIlicon X-ray Array
- SK
- SuperKamiokande.
- SKA
- Square Kilometer Array.
- SKdV
- Supersymmetric Korteweg-de Vries
- Skew Quad
- A quadrupole whose axis is rotated 45 degrees. This puts the
coils vertical and horizontal instead of `X' shaped as in a
regular quadrupole.
- Skyshine
- Air-scattered radiation.
- SL
- SuperLattices
- SL
- energy defining SLit, high Z slit.
- SLA
- Service Level Agreement
- SLAC
- SLAC National Accelerator Laboratory. (Formerly Stanford
Linear Ac celerator Center.)
- SLAC
- Stanford Labor Action Coalition.
- SLAC
- ScaphoLunate Advanced Collapse.(Wrist condition: see
http://www.medmedia.com/ooa1/98.htm)
- SLAC Energy Doubler
- See SLED.
- SLAC Orange
- A portable ionisation chamber survey meter designed by the
SLAC Health Physics Group and fabricated on-site.
- SLAC Standard Operating Procedure
- See SOP.
- SLAC Web page
- a Web Page that is served by a SLAC computer.
- SLAC-LBL detector
- Original name of the Mark I detector. One of the first large
solid angle detectors. Built by SLAC Group E (Martin Perl and
Gary Feldman), Group C, and a Lawrence Berkeley Lab group led by
Willy Chinowsky, Gerson Goldhaber, and George Trilling. Detector
was later expanded to improve muon detection and then modified to
improve the electron and photon detection.
- SLACERT
- SLAC Emergency Response Team.
- SLACNET
- SLAC NETwork.
- SLACronym
- Acronym / lingo used at SLAC.
- SLACS
- Sloan Lens ACS survey. An efficient Hubble Space Telescope
(HST) s napshot imaging survey for new galaxy-scale strong
gravitational l enses.
- SLAM
- SLC LAM Generator. A CAMAC module.
- SLC
- Stanford Linear Collider (100 GeV Ecm). Originally SLAC
Linear Col lider.
- SLC Control Program
- See SCP.
- SLC Large Detector
- See SLD.
- SLCCC
- Systems of Laboratories Computer Coordinating Committee.
- SLCCS
- SLC Control System. Software system designed in the early
1980's for accelerator control.
- SLCNET
- The broadband local area digital network that communicates
between the VAX and the micros located in the various SLC areas.
This is a custom high speed logic star network using MULTIBUS.
- SLD
- SLAC Large Detector. A particle plysics detector optimized
for the SLC interaction point. SLD has also been called the
Stanford Large Detector and the SLC Large Detector. Sources close
to the experiment confide that SLD was originally called the
"Slick Little Detector."
- SLD-Notes
- Publication produced by the SLD Collaboration on an
irregular basis.
- SLDA
- Superfluid Local Density Approximation.
- SLEAP
- Stanford Linear Electron Accelerator Project. (1960's name
for what eventually became SLAC. Came after Project M name.)
- SLED
- SLAC Energy Doubler. A system of RF resonant cavities on the
output of each klystron which doubles the strength of the
electric field delivered to the LINAC. It works by storing the
front, or leading half of the klystron pulse, and then adding
that energy to the rear, or trailing half of the pulse to get a
pulse which is about half as long but twice as strong in peak
power. `Sledding' the linac has enabled it to double its total
accelerating range from about 30 GeV to 60 GeV at a fraction of
the cost of doubling the number of klystrons.
- SLED II
- SLAC Energy Doubler, version 2. Upgrade to SLED system
designed by Sami Tantawi.
- SLEGS
- Shanghai Laser Electron Gamma Source.
- Sleuth
- A model-independent search strategy for new high-pT physics,
developed by physicist Bruce Knuteson and used by the D0
collabora tion in Tevatron Run I. Initially known as Sherlock,
the name was changed to Sleuth to avoid trademark litigation.
- sLHC
- Super LHC.
- SLI
- Science Laboratory Infrastructure.
- SLIC
- GEANT4-based flexible full-detector simulation program.
Replaces L CDG4.
- SLIP
- Serial Line IP. A protocol that allows a computer to use the
Internet protocols and become an Internet member with a standard
phone line and a high-speed modem. Being superseded by PPP but
still used.
- SLM
- Synchrotron Light Monitor.
- Slow Valve
- See VAT Valve.
- SLS
- Swiss Light Source, a synchrotron radiation facility at the
Paul Scherrer Institute (Switzerland).
- SLSO
- Systems Laser Safety Officer.
- SLTR
- South LINAC To Ring.
- SLUM
- Silicon LUMinosity tracker.
- SLUO
- SLAC Users Organization (previously SLAC-LBL Users
Organization)
- SLV-III
- Satellite Launch Vehicle-III.(India)
- SM
- Standard Model.
- SM-LWFA
- Self-Modulated Laser Wakefield Acceleration
- Small Angle Monitor
- See Mini Sam.
- Small Power Supply
- See SMPS.
- SMART
- Safety MAnagement Records Tool. (database)
- Smart Analog Module
- See SAM.
- SMART goals
- Specific, Measurable, Aggressive, Realisic, Time-bound goals
for job performance.
- SMARTS
- Small and Moderate Aperture Research Telescope System.
- SMASH-ML
- Solving Materials And Structures by Heuristic Machine
Learning
- SMB
- Structural Molecular Biology.
- SMBH
- Super Massive Black Hole.
- SMC
- Stepper Motor Controller. A CAMAC module.
- SMC
- Spin Muon Collaboration (CERN)
- SMC
- Small Magellanic Cloud
- SMCT
- Semiconductor Multiple-Compton Telescope.
- SMDS
- Switched Multimegabit Data Service. An emerging high-speed
networking technology to be offered by the telephone companies in
the U.S.
- SME
- Standard Model Extension.
- SME
- Subject Matter Expert.
- SMEX
- SMall EXplorer (NASA Program).
- SMG
- Standard Model Gauge group
- SML
- Standby Maintenance List (Artemis).
- SMMC
- Shell Model Monte Carlo
- Smog
- Air pollution associated with oxidants.
- SMP
- Strategic Military Panel
- SMPS
- SMall Power Supply. A SLC VAX primary.
- SMRT
- Single Molecule Real Time. Pacific Biosciences trademark
term for its biological analysis platform.
- SMS
- Safety Management System.(SLAC's ISMS program.)
- SMS
- Surface and Materials Science department (Formerly Physical
Electronics).
- SMT
- SAM Tester.
- SMT
- Senior Management Team.
- SMTF
- Superconducting Module Test Facility. (ILC)
- SMTP
- Simple Mail Transfer Protocol. The Internet standard
protocol for transferring electronic mail messages from one
computer to another. SMTP specifies how two mail systems interact
and the format of control messages they exchange to transfer
mail.
- SN
- SuperNova
- SN
- See NASA's Space Network website.
Glast Category: organization
URL: http://msp.gsfc.nasa.gov/tdrss/tdrsshome.html
- SN
- ServiceNow.
- SNA
- Systems Network Architecture. The proprietary network
architecture of IBM.
- SNAP
- SuperNova Acceleration Probe/Program. See JDEM.
- SNARL
- Suggested No Adverse Response Level.
- SNBO
- SuperNova Burst Observatory.
- SND
- Spherical Nonmagnetic Detector
- SNe
- SuperNovae.
- SNF
- Stanford Nanofabrication Facility.
- SNI
- Super Nova Type I
- SNIa
- Type Ia SuperNovae.
- SNIC
- SLAC-Novosibirsk Instrumentation Conference.
- SNIF
- Secret Neutrino Interactions Finder.
- SNII
- Type II SuperNovae.
- SNLO
- Select Non-Linear Optics.
- SNMP
- Simple Network Management Protocol. The network management
protocol of choice for TCP/IP-based internets.
- SNO
- Subdury Neutrino Observatory (Canada). Also referred to as
SNOLab.
- SNOLAB
- Sudbury Neutrino Observatory LABoratory. (Canada)
- SNOOP
- Diagnostic module for Fastbus.
- SNR
- SuperNova Remnant
- SNR
- Structure resulting from a supernova. This remnant is
bounded by an expanding shock wave consisting of material ejected
from the explosion, and any interstellar material swept up in the
expansion and affected by the shock.
Glast Category: astronomy
- SNS
- Spallation Neutron Source. (Oak Ridge)
- SNUG
- Synchrotron Neutron User Group.
- SNUR
- Significant New Use Rule. (from TSCA)
- SN1987A
- SuperNova 1987A.
- SO
- Secretarial Officer.
- SO
- Safety Officer (institutional).
- SOARS
- |Tracking tool used by NASA to track summary of GLAST
anomalies. Similar to the JIRA system used at SLAC, SOARS is
specifically targeted for tracking spacecraft-related anomalies.|
Glast Category: operations, spacecraft
- SOB
- StandOff Box. (BaBar)
- SOC
- Synthetic Organic Chemical.
- SOC
- Safety Overview Committee.
- SOC
- Science Operation Center (GLAST-NASA).
- SODA
- SLAC Online Drawing Access. (database)
- Soft Bend
- A weak bend magnet, usually the last bend in a string before
a target or interaction point, which, due to its lower strength,
creates less synchrotron radiation noise on the detection
apparatus.
- SOG
- Science Operations Group.(GLAST)
- SOI
- Silicon-On-Insulator.
- SOIC
- SSRL Operator In Charge.
- SOLEIL
- Source Optimisee de Lumiere d'Energie Intermediaire du Lure.
Third-generation synchrotron radiation source in France.
- Solid State Subbooster
- See SSSB.
- Solubility
- The ability of a solid, liquid, or gas to dissolve in a
solvent (usually expressed in water). Not related to density or
specific gravity.
- Solvent
- A substance (usually liquid) capable of dissolving or
dispersing one or more other substances.
- SOM
- Same-Order Mode.
- SOML
- Steward Observatory Mirror Laboratory (Arizona).
- SON
- Safety Orientation for Non-employees (ES&H)
- SOOG
- |The SOOG assesses the impact of instrument configuration
changes with respect to the science community and the mission.
Membership includes the Project Scientist and deputies, the LAT
and GBM Principal Investigators, the GUG ch|
|air and the leads for the GSSC, MOC, LAT ISOC, and GBM IOC.
This group is informed about all changes to science operations
parameters and reviews weekly scientific performance. SOOG
approval is required on controlled, mission-level paramet|
|ers.|
Glast Category: management
- SOP
- Standard Operating Procedure. SOP numbers are given to SLAC
documents on various subjects.
- SOPF
- Stanford Outdoor Primate Facility
- SOR
- Synchrotron Orbital Radiation.
- Sorbent
- A material that attracts and holds another material.
- SORI
- Safety and Operational Reliability Improvements
project.(Sometimes written as S&ORI)
- Sorption
- The action of soaking up or attracting substances. A process
used in many pollution control systems.
- SOUD
- SOUDan underground detector (MN, USA)
- SOUDAN 2
- One-kiloton underground detector in former iron mine in
Soudan (MN, USA)
- Source
- The area or device where a beam of particles originates, as
in `positron source.'
- South Injection Tunnel
- See SIT.
- SOW
- Statement Of Work.
- SO2
- Sulfur Dioxide. A heavy, pungent, colorless, gaseous air
pollutant formed primarily by industrial fossil-fuel combustion
processes.
- Space Charge
- The repulsive Coulomb forces in a bunch of particles of the
same polarity.
- SPAFOA
- Superconducting Particle Accelerator Forum of the Americas.
- SPAG
- Standards Promotion and Application Group. A group of
European OSI manufacturers which chooses option subsets and
publishes these in a `Guide to the Use of Standards' (GUS).
- Spallation
- A process in which a beam of protons smashes into a target,
releasing a flood of neutrons.
- SPASM
- Single-Pass ASseMbler.
- SPATS
- South Pole Acoustic Test Setup.
- SPC
- Scientific Policy Committee. From 2005-2008, the SLAC Policy
Commi ttee.
- SPC
- Single Pass Collider.
- SPCC
- Spill Prevention, Countermeasures and Control plan.
- SPCP
- Single Pass Collider Project (Proposed in 1980).
- SPD
- Strategic Projects Division.(LCLS)
- SPEAR
- Stanford Positron Electron Accelerating Ring. Created in
1970 out of the SLAC operating budget (it was not separately
funded). Originally designed in 1963 as a single-ring machine
called the SLAC Electron-Positron Colliding Beam Storage Ring,
the design was upgraded in 1969 and a double-ring asymmetric
machine, the 'Stanford Positron Electron Asymmetric Rings'
(hence, SPEAR) was proposed. When funding failed to materialize,
the project was scaled back to a single, racetrack-ring
configuration and the acronym was converted to the machine's one-
word name. (For a time the scaled-back, single-ring revised
design was referred to as 'SPEAR 1/2', but the name did not
stick.) Many high-energy physics experiments have been conducted
in this facility, two of which have earned Nobel prizes: one for
the discovery of the Psi/J particle, or Charmed Quark in 1974,
and a second for the discovery of the Tau lepton in 1975. SPEAR
is now being used as a synchrotron light source by many
experimenters from all over the world, and it is probably the
most useful high-energy physics machine ever built.
- SPEAR 3
- Planned upgrade of SPEAR that proposes to replace the ring
with a new set of magnets and other components which would
improve its performance as a light source.
- SPEC
- Spectrometer.
- SPEC
- SPECification.
- Special Review
- Formerly known as Rebuttable Presumption Against
Registration (RPAR), this is the regulatory process through which
existing pesticides suspected of posing unreasonable risks to
human health, non-target organisms, or the environment are
referred for review by EPA. The review requires an intensive
risk/benefit analysis with opportunity for public comment. If the
risk of any use of a pesticide is found to outweigh social and
economic benefits, regulatory actions--ranging from label
revisions and use-restriction to cancellation or suspended
registration--can be initiated.
- Specific Gravity
- The ratio of the density of a substance to the density of
water.
- SPECT
- Single-Photon Emission Computer Tomography.
- SPECT
- SPECTrometer line.
- Spectrometer
- Energy Spectrometer. A device to measure the energy spectrum
of a beam. Sometimes call a Mass Spectrometer. A beam of a given
mass and energy is bent around a noodle shaped bend magnet into a
detector or counter. Only particles of the required or specified
mass and velocity (energy) will be bent into the target by the
carefully regulated field of the bend magnet.
- SPI
- Sign of Polarization Inverter, a SLC Polarized Light Source
Subsystem.
- SPICA
- SPace Infrared telescope for Cosmology and Astrophysics.
- SPIE
- International Society for Optical Engineering.
- Spill Monitor
- An ion chamber near the beampipe designed to show the
operators the relative amount of beam being lost by `scraping' on
the inside of the beampipe, or on any upstream device.
- Spill Response
- Environmental Safety and Health procedure for responding to
the ac cidental overflow of hazardous or non-hazardous material.
- SPIM
- Selective Plane Illumination Microscope.
- Spin Rotator
- A solenoid magnet used to rotate the spin axis of electrons
in a polarized beam.
- SPIRAL
- Système de Production d'Ions Radioactifs
Accélérés en Ligne. (System for the Production of
Radioactive Ions Accelerated on Line)
- SPIRES
- Stanford Public Information REtrieval System. A database
management system widely used for large bibliographic databases.
At SLAC, BINLIST, HEP, BOOKS, DRAW, CONF, SEMINARS, SERIALS, and
INST are some of the databases maintained in SPIRES.
- SPL
- Superconducting Proton Linac (CERN-proposed).
- SPL
- Single Purchase Limit.
- SPOF
- Single Point Of Failure.
- Spoiler
- A device to blow up the beam size. A spoiler is used in
front of the positron target. Spoilers are used to reduce the
density of energy deposited on a dump, stopper, or other target.
Instead of the tightly focused beam burning a hole in the dump,
stopper, or target, the spoiler `spreads the misery around,'
distributing the energy over the whole frontal area of the
device.
- Spot
- The bright mark made by the beam on a profile monitor
screen. Generally, operators try to reduce the size of the spot
and give it a good shape by adjusting machine parameters that are
upstream of the screen.
- SPP
- Strategic Partnership Projects
- SPPC
- SPoolPieCe.
- SPPS
- Super antiProton Proton Synchrotron (CERN).
- SPPS
- Sub-Picosecond Particle Source (formerly Sub-Picosecond
Photon Source).
- SPring-8
- Super Photon ring-8 GeV. Synchrotron radiation source
currently under construction at Harima, Japan. A RIKEN facility,
SPring-8 will cost almost $1 billion to construct, and will be
the world's most brilliant synchrotron radiation source.
- SPRK
- Spark chamber.
- SPRL
- State Priority Ranking List.
- SPS
- Super Proton Synchrotron (CERN)
- SPs
- Service Packs (computing).
- SPS+
- Superconducting SPS.
- SPSC
- SuperProton-Synchrotron Collider.
- SPSC
- Super Proton Synchrotron Committee (CERN).
- SPSCL
- Set-up Phase Safety Checklist. (LCLS)
- SPTpol
- South Pole Telescope polarization-sensitive microwave
camera.
- SPTRM
- SPecTRoMeter.
- SPTT
- SPuTTering.
- SPY
- Secondary Particle Yield (CERN experiment)
- SQ
- Sub-scale Quadrupole.
- SQCD
- Supersymmetric QCD
- SQED
- Supersymmetric Quantum ElectroDynamics.
- SQF
- Safety Qualification Form.
- SQG
- Small Quantity Generator. (from RCRA)
- SQL
- Structured Query Language. The international standard
language for defining and accessing relational databases.
- SQM
- Supersymmetric Quantum Mechanics.
- SQM
- Strange Quark Matter.
- SQN
- Strange Quark Nuggets.
- SQS
- Space of Quantum States.
- SQUID
- Superconducting QUantum Interference Device.
- SQUID
- Superconducting Quantum Interference Device.
- SQUIDS
- Superconducting Quantum Interference Device.
- SR
- Shielded Room. A PPS Item.
- sr
- The solid (3D) angle formed when an area on the surface of a
sphere is equal to the square of the radius of the sphere. There
are 4 Pi steradians in a sphere. (See Wikipedia definition)
Glast Category: astronomy
URL: http://en.wikipedia.org/wiki/Steradian
- SR
- Synchrotron Radiation.
- SR
- SteRadian.
- SR
- Sponsored Research
- SRB
- South Reverse Bend. See RB.
- SRB
- Storage Resource Broker (grid software).
- SRC
- Science Research Council.
- SRCF
- Stanford Research Computing Facility.
- SRD
- Science, Research and Development division. (LCLS)
- SRF
- Superconducting RF.
- SRF
- Superconducting Radio-Frequency.
- SRI
- Synchrotron Radiation Instrumentation
- SRL
- Synchrotron Radiation Laboratory (Japan).
- SRMS
- Synchrotron Radiation in Materials Science (conference).
- SRR
- Site Recommendation Report.
- SRR
- System Requirements Review.
- SRS
- Synchrotron Radiation Source
- SRS
- Savannah River Site. (DOE)
- SRTL
- South Ring To LINAC.
- SRX
- Sub-micron Resolution X-ray spectroscopy.
- SR2A
- Synchrotron Radiation in Art and Archeology (workshop).
- SS
- Suspended Solids.
- SS
- Source and Special
- SSA
- Single Spin Asymmetries.
- SSAC
- See SSAC website.
Glast Category: organization
URL: http://www-glast.stanford.edu/ssac.html
- SSB
- Spontaneous Symmetry Breaking.
- SSB
- Science Support Building. (SLAC- proposed)
- SSC
- Superconducting Super Collider (defunct).
- SSC
- Stop-Start-Continue.
- SSC Advisory Panel
- See SSCAP.
- SSCAP
- The SSC Advisory Panel. An international committee of
physicists that determined the SSC experimental program.
- SSD
- Silicon Strip Detector (GLAST).
- SSE
- Stars and Stellar Evolution.
- SSI
- SLAC Summer Institute.
- SSJ
- Single-Source Justification.
- SSL
- Secure Sockets Layer. A protocol developed by Netscape for
transmitting private documents via the internet. SSL works by
using a private key to encrypt data that is transferred over the
SSL connection. Both Netscape Navigator and Internet Explorer
support SSL, and many Web sites use the protocol to obtain
confidential user information, such as credit card numbers. Web
pages that require an SSL connection start with https instead of
http.
- SSM
- Supersymmetric Standard Model
- SSO
- SLAC Site Office. (DOE)
- SSOW
- SLAC Statement of Work.
- SSP
- Site Safety Plan.
- SSP
- Shared Services Package (Microsoft).
- SSP
- Science Simulation Plan
- SSP
- System Security Plan. (OCIO)
- SSPM
- Solid-State PhotoMultiplier
- SSPR
- Self-Service Password Reset.
- SSR
- |The Observatory's SSR is a 160 Gbit unit is used to store
instrument science data and Observatory housekeeping (HSK) data
between high-speed downlink contacts. A parallel data interface
is employed for recording and playback, a|
|nd a serial interface for command and statusing of the
device. Block redundant communications and power interfaces are
used to accommodate the spacecraft's other command and data
handling (C&DH) block redundant interfaces. A single SSR mem|
|ory array interfaces to either of the redundant interfaces.
SSR memory has two partitions, one for storing science data, and
the other for storing Observatory housekeeping data.|
Glast Category: hardware, operations, spacecraft
- SSRC
- Synchrotron Radiation Research Center. (China)
- SSRF
- Shanghai Synchrotron Radiation Facility.
- SSRL
- Stanford Synchrotron Radiation Lightsource. A division of
SLAC which does experiments with synchrotron light generated by
the SPEAR storage ring. The synchrotron light produced by the
SPEAR ring is a relatively narrow bandwidth, `hard' X-Ray
spectrum that is very useful in medical research, as well as in
crystallography. (Formerly Stanford Synchrotron Radiation
Laboratory 1977-2008, and Stanford Synchrotron Radiation Project
1973-1977.)
- SSRLUOEC
- SSRL Users' Organization Executive Committee.
- SSRO
- SLAC Sponsored Research Office.
- SSRP
- Stanford Synchrotron Radiation Project (1973-1977). Became
SSRL in 1977.
- SSSB
- Solid State SuBbooster. The subboosters driving some of the
klystrons are solid state (ex. K02, EP02, Rings).
- SSSP
- Site-Specific Safety Plan.
- SSUN
- SLAC, Stanford University, NREL. (SIMES)
- SSUSY
- Second derivative SUperSYmmetry.
- STA
- Science and Technology Agency. Japanese government agency
which, along with the Ministry of Education, Science, Sports and
Culture (Monbusho) funds big science in Japan.
- STA
- SLAC Training Assessment. A process matching training with
hazards an individual faces in his/her work.
- STACEE
- Solar Tower Atmospheric Cherenkov Effect Experiment.
(Sandia)
- Standardization
- The process of cycling magnet currents through a preset
pattern to establish a known hysteresis point in the iron of each
magnet. This gives any particular magnet field configuration the
necessary repeatability to be useful in beam operations.
- Standards
- Prescriptive norms which govern action and actual limits on
the amount of pollutants or emissions produced. EPA, under most
of its responsibilities, establishes minimum standards. States
are allowed to be stricter.
- Standards Promotion and Application Group.
- See SPAG.
- Standby
- See STB.
- Standby Maintenance List
- A waiting maintenance list updated every morning at the
Maintenance Meeting and posted near the MCC door. The list
includes the problems, the area, the entry needs or not, and the
person to contact.
- Standby Timing
- The continuous timing and pulsing of a kicker magnet or
klystron even when no beam code triggers are present. The Standby
time is 15 to 50 microseconds after beam time and is different
for each sector to avoid acceleration of dark current. The
stations need to be pulsed on standby to keep them warmed up so
they will be in time and at the right energy when they are
actually used to accelerate the beam.
- STANFORD Positron Electron Accelerating Ring
- See SPEAR.
- Stanford Public Information Retrieval System
- See SPIRES.
- Stanford Synchrotron Radiation Laboratory
- See SSRL.
- STANFORD-PRINCETON STORAGE RINGS
- A figure-eight, weak-focusing, electron-electron collider
built at Stanford in 1958-1963 by a group led by Gerald K.
O'Neill (Princeton) and Burton Richter (Stanford). Using the
Stanford MARK III accelerator as an injector, the collider
consisted of two rings, each ten feet in diameter, in which
electrons circulated in opposite directions, colliding at the
intersection point. When built, the rings contained the largest
ultra-high vacuum system in the world. The energy lost to
synchrotron radiation was compensated for by a radio frequency
system which gave an electron a boost of energy as it came
through the accelerating cavity. The detector used on the rings
was an optical spark chamber.
- STAP
- Staff Training Assistance Program. (Stanford University)
- STAR
- Solenoidal Tracker At RHIC (BNL)
- STAR
- Scientific and Technical Abstracts Reports.
- STAR
- Science Teachers And Researchers. (SLAC, CSU, Bechtel)
- Star Network
- LAN in which multiple workstations are connected to a
central server. All communications must be routed through the
central server.
- STARE
- Survey for Transient Astronomical Radio transmission
- START
- Safety Toward Avoiding Risk Today.
- START
- Scintillation Tile with mrs Apd light ReadouT.
- Station
- Usually refers to one of the klystrons of the LINAC,
together with its modulator and other auxiliary devices necessary
for operation.
- Status Display Summary
- See SDS.
- STAU
- Supersymmetric TAU
- STB
- Standby. A klystron CUD message indicating a poor or bad
standby timing result. See Standby Timing.
- STB
- Simple Timing Buffer. A CAMAC timing module which converts
differential MECL timing backplane signals to front panel NIM
pulses. Used with a PDU.
- STCC
- Standard Transportation Commodity Code.
- Steer
- To guide a beam through its preferred optical path using the
available corrector magnets and trim windings allocated for that
purpose. Since upstream changes in steering magnify effects the
further downstream you go, steering is usually done with the aid
of computer programs based on mathematical models of the lattice.
These are called `Autosteering' programs.
- STELLA
- Staged Electron Laser Acceleration. (Brookhaven)
- STEM
- Science Technology Education and Math.
- STEP
- A SLC VAX primary which includes stepping motor status and
other devices using such motors.
- Stepper Motor Controller
- See SMC.
- steradian
- The solid (3D) angle formed when an area on the surface of a
sphere is equal to the square of the radius of the sphere. There
are 4 Pi steradians in a sphere. (See Wikipedia definition)
Glast Category: astronomy
URL: http://en.wikipedia.org/wiki/Steradian
- STF
- Superconducting rf Test Facility (KEK).
- STFC
- Science and Technology Facilities Council. (UK)
- STI
- Scientific and Technical Information.
- STI
- Steel Tank Institute.
- STIC
- Small angle TIle Calorimeter
- STIRAP
- STImulated Raman Adiabatic Passage
- STLC
- Soluble Threshold Limit Concentration. (CCR Title 22)
- Stochastic resonance
- A nonlinear phenomenon in which random noise optimizes a
system's response to a weak signal.
- STOL
- |Interpretive language used in PROCs by the MOC's Flight
Operations Team to command GLAST.|
Glast Category: operations, spacecraft
- STOP
- A trigger used to control the output of the thermionic gun
in the injector by changing the bias on the grid. Trigger time is
converted to a bias voltage.
- Stopper
- A PPS device used to stop the beam, usually by allowing a
heavy metal slug to pivot into the beam's path.
- STORI
- an International Conference on Nuclear Physics at Storage
Rings, originally called the Symposium on Nuclear Physics at
Storage Rings.
- STP
- Standard Temperature and Pressure.
- STPR
- STOPPER.
- STR
- Special Theory of Relativity
- STRAW
- Thin walled tube chambers.
- STRC
- STReamer Chamber.
- Streak Camera
- A device that measures the time distribution of a light
pulse. Used to measure bunch length. Very fast pulses of the
order of a nanosecond or less can be measured with a Streak
Camera.
- Strict Liability
- Holds a party responsible for damages irrespective of the
amount of care taken in handling a hazardous substance.
- STRN
- Standard Technical Report Number.
- STRP
- Staff Tuition Reimbursement Program (Stanford University).
- Structured Query Language
- See SQL.
- STTR
- Small business Technology TransfeR. (US Gov't)
- STXM
- Scanning Transmission X-ray Microscope.
- SU
- Stanford University.
- Subbooster
- See SBST.
- Subbooster Drive Line
- See SDL.
- Subbooster Interface
- See SBI.
- Subharmonic Buncher
- See SHB.
- Subtitle C
- The part of RCRA which pertains to the management of
hazardous waste.
- Subtitle 1
- The part of RCRA which pertains to the storage of petroleum
products and hazardous substances, other than wastes, in
underground tanks.
- SUD
- Safe Use Determination.
- SUGRA
- SUperGRAvity
- Sulfur Dioxide
- See SO2.
- SULI
- Science Undergraduate Laboratory Internship. (Formerly: SLAC
Undergraduate Laboratory Internship)
- Summarize
- To encapsulate a number of responses into one coherent,
usable message. Often done on controlled mailing lists or active
newsgroups, to help reduce bandwidth.
- Summary Information Process
- See SIP.
- SUMMIT
- Stanford University Medical Media and Information
Technology.
- Sun's Network Information Service
- See NIS.
- SUNCAT
- SUstainable eNergy through CATalysis. (SLAC Photon Science
initiat ive)
- SUNET
- Stanford University NETwork.
- SUOH
- Stanford University OverHead.
- SUP
- Seismic UPgrade.
- SuperB
- A high-intensity B-factory planned for construction near
Frascati in Italy
- Superfish
- A modeling program used for CID which includes the S-BAND
buncher and K02. It is able to calculate the field in a cavity.
- Superfund
- See CERCLA.
- Supergravity
- An enrichment of ordinary general relativity in which the
space/ time coordinates are fermionic as well as bosonic. It is
an up- dating of general relativity to include fermions just as
supersymmetry is an updating of special relativity to take into
account that fermions exist.
- SuperKamiokande
- A neutrino detector built in Japan to observe neutrinos from
the Sun and supernovae. The detector is a 50,000 ton water tank
that is 41 meters high, 39 meters wide, and surrounded by 11,200
giant photomultiplier tubes. The tubes detect the flashes of
Cherenkov radiation produced when the neutrinos interact with the
water. The detector is located in a lead-zinc mine under 1000
meters of rock, which filter out the background cosmic rays.
- supernova
- A violent explosion of a massive star at the end of its life
that creates an extremely luminous object made of plasma.
Initially, a supernova may outshine its host galaxy before fading
from view over a period of weeks or months.
Glast Category: astronomy
- Supersloop
- Working name for 1970's project to convert the SLAC linac to
a superconducting accelerator. (Project was canceled)
- Supersymmetry
- A conjectured symmetry between fermions and bosons. Two-
dimensional supersymmetry emerged historically from Pierre
Ramond's discovery in 1970 of how to incorporate fermions into
string theory. Supersymmetry was formulated as a four-dimensional
symmetry by Julius Wess and Bruno Zumino in 1974. It was also
conceived independently by Yuri Gol'fand and Eugeny Likhtman in
1971.
- SUPF
- Stanford University Primate Facility (former SLAC neighbor).
- SURA
- Southeastern Universities Research Association.
- SURF
- Sanford Underground Research Facility (Lead, South Dakota)
- SUSB
- Science and User Support Building.
- SUSY
- SUperSymmetrY.
- SUSYM
- SUperSymmetric Yang-Mills.
- SUTI
- Sensitive Unclassified Technical Information
- Suzaku
- Astro-E2 / ASTRO-EII. Renamed Suzaku (Red Bird) in July
2005.
- SV
- Small Velocity
- SV
- Schedule Variance.
- SVAC
- Science Verification And Calibration. (GLAST)
- SVAC
- |SVAC's pre-launch responsibilities included ongoing
assessment of the performance of the LAT as an instrument, data
analysis, validation of Monte Carlo (MC)data simulations, and
calibration of the instrument. These responsibili|
|ties have been transferred to the ISOC's Science Operations
group.|
Glast Category: operations
- SVD
- Singular Value Decomposition
- SVT
- Silicon Vertex Tracker.
- SW
- Solid Waste.
- SW
- Seiberg-Witten
- SWAA
- Satellite Waste Accumulation Area.
- SWAT
- Solid Waste Assessment Test. (CGC Sec. 66796.53, 66796.54,
CWC Sec. 1 3273)
- SWG
- Space Working Group (SLAC).
- SWG
- Science Working Group.
- SWG
- |The Science Working Group is responsible for making sure
that GLAST is optimally designed to meet its mission
requirements, both administrative and technical. It also assists
in establishing overall mission planning priorities,|
|and in prioritizing the science requirements. In addition,
the SWG assists the GLAST project in the definition and
development of the calibration, data handling, data reduction,
and mission operations systems.|
Glast Category: management
URL: http://glast.gsfc.nasa.gov/science/swg/
- SWIC
- Scanning Wire Ion Chamber. A precise beam position measuring
device used to calculate beam energy.
- Swift-BAT
- Swift Burst Alert Telescope. (NASA-Goddard)
- Switched Multimegabit Data Service
- See SMDS.
- SWKB
- Supersymmetric Wentzel-Kramers-Brillouin
- SWMB
- Solid Waste Management Board (aka CWMB).
- SWMR
- Single-Writer Multiple-Reader.
- SWOPSI
- Stanford Workshops On Policital and Social Issues.
- SWOT
- Strengths, Weaknesses, Opportunities and Threats.
- SWP
- Safety Watch Person.
- SWPPP
- Storm Water Pollution Prevention Plan.
- SWRCB
- State Water Resources Control Board. (California)
- SXNS
- Surface X-ray and Neutron Scattering.
- SXR
- Soft X-Ray materials science instrument. (LCLS)
- SXRD
- Synchrotron-based surface X-Ray Diffraction.
- SXRSS
- Soft X-Ray Self Seeding.
- SYM
- Supersymmetric Yang-Mills
- Synchronous
- Data communications in which transmissions are sent at a
fixed rate, with the sending and receiving devices synchronized.
- Synchrotron Feedback
- A damping ring RF feedback system which regulates the
longitudinal beam oscillations due to the RF driving forces.
- Synchrotron Light
- See Synchrotron Radiation.
- Synchrotron Oscillation
- A longitudinal oscillation induced in an accelerated bunch
by the RF driving forces imparted to the bunch by the cavities.
- Synchrotron Radiation
- When a charged particle such as an electron or positron is
bent in a magnetic field, it loses energy in the form of photons
(light) which are given off in a direction tangential to the
curved path of the charged particle. These photons are called
Synchrotron Radiation after the high energy physics machine where
they were first observed. The photon energy increases with the
4th power of the beam energy and decreases with the square of the
radius of curvature. Synchrotron light, or X-rays, are used for
beam observation purposes, for the study of the structure of
matter, and for medical research. See also SPEAR.
- Synergism
- The cooperative interaction of two or more chemicals or
other phenomena producing a greater total effect than the sum of
their individual effects.
- System 20 Box
- A local network server used by the VAX computers to
communicate with their terminals. System 20 uses one frequency
band of the CATV network. The box is made by SYTEK.
- Systems Network Architecture
- See SNA.
- SYZ
- Strominger-Yau-Zaslow.
- SZ
- Sunyaev-Zeldovich
- SZE
- Sunyaev-Zel'dovich Effect.
Send corrections to jmdeken@slac.stanford.edu
or propose new terms for SLACspeak.