Skip to main content.

Archives & History Office

SLACspeak Terms

Search or browse by letter A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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.
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.
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.
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
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
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
SCET
Soft Collinear Effective Theory.
SCFF
Super Conducting Final Focus.
SCFT
SuperConformal Field Theory
SCGF
DOE Office of Science (SC) Graduate Fellowship 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.
SCM
SuperConducting Magnet
SCM
Supply Chain Management.
SCOAP3
Sponsoring Consortium for Open Access Publishing in Particle Physi cs.
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.
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.
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 Projectg
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.
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.
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.
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)
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.
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.
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
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.
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.
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.
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.
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.
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.
SRS
Synchrotron Radiation Source
SRS
Savannah River Site. (DOE)
SRTL
South Ring To LINAC.
SR2A
Synchrotron Radiation in Art and Archeology (workshop).
SS
Suspended Solids.
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 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
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. A SLC VAX primary.
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.
SUSB
Science and User Support Building.
SUSY
SUperSymmetrY.
SUSYM
SUperSymmetric Yang-Mills.
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).
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)
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.

TIS: Archives and History Office | Library | InfoMedia Solutions