- T(c)
- Critical Temperature (for superconductors).
- T&DF
- Trigger & Data Flow system (GLAST).
- T-Matrix
- A VAX database which contains most of the timing data
necessary to run all the triggerable devices in the machine. Each
micro contains the piece of the T-Matrix it needs, called the
beam matrix. `IPLing' the micro refreshes or reloads the T-Matrix
into the micro.
- T-Matrix
- A reference to the Twiss Parameters Matrix.
- T/R
- Transmit/Receive.
- TA
- Test Accelerator.
- TAC
- Toxic Air Contaminant. (CH&SC Sec. 39650 et seq)
- TAC
- Texas Accelerator Center.
- TAC
- Technical Advisory Committee (Linac Coherent Light Source).
- TAC
- Time to Amplitude or Analog Converter.
- TAG
- Temporal Axial Gauge
- Taleo
- Enterprise management staffing software in use at SLAC.
- TAMA
- Interferometeric gravitational-wave detector. (Japan)
- TANGO
- an object oriented control system based on CORBA.
- TAOS
- Taiwanese American Occultation Survey.
- TAPS
- Two-Arm Photon Spectrometer
- Target Coil
- The coil around the positron target.
- TARLA
- Turkish Accelerator and Radiation Laboratory at Ankara.
- TASI
- Theoretical Advanced Study Institute.
- TASS
- TASSo detector (DESY).
- Tau Charm Factory
- See TCF.
- Tauon
- Tau-Lepton.
- TB
- Two Boson
- TBA
- Thermodynamic Bethe Ansatz
- TBA
- Two-Beam Accelerator.
- TBD
- To Be Done.
- TBD
- Technical Basis Document (ES&H).
- TBLC
- Two-Beam Linear Collider
- TBR
- To Be Replaced. A klystron status mode indicating the
klystron tube needs replacement.
- TC
- Toxicity Characteristics.
- Tc
- critical Temperature (in superconductivity).
- TC
- Target Changer multiple, beryllium, single foil, liquid H2or
D2
- TCA
- 1,1,1-Trichloroethane.
- TCAV
- Transverse CAVity. (LCLS)
- TCE
- Trichloroethylene.
- TCF
- Tau Charm Factory. A very high-luminosity electron- positron
collider with a total energy of about 3 to 4.5 GeV. This energy
range enables the copious production of tau leptons and charmed
mesons by electron-positron annihilation with a minimum of
background from other annihilation processes.
- TCLP
- Toxicity Characteristic Leaching Procedure. (See 40 CFR,
Part 268, Appendix l.)
- TCM
- Toroid Charge Monitor. A CAMAC module used to digitize beam
current intensities measured by the toroids in the beam line.
- tcmIS
- total chemical Information System.
- TCP
- Transmission Control Protocol. The major transport protocol
in the Internet suite of protocols providing reliable,
connection- oriented, full-duplex streams. Uses IP for delivery.
- TCP/IP
- Transmission Control Protocol/Internet Protocol. A common
computer data standard combining transport and network level
protocols. Often used with Ethernet as a physical layer protocol.
- TCPIP
- See TCP/IP
- TCSA
- Truncated Conformal Space Approach
- TCSG
- A secondary collimator at the LHC.
- TCW
- ThermoCouple Wire.
- TD
- Technical Division.
- TD
- Transportation Department.
- TDAQ Week
- Trigger and Data AQuisition Week. (Atlas -- at SLAC)
- TDC
- Time to Digital Converter. A database primary.
- TDGL
- Time-Dependent Ginzburg-Landau
- TDHF
- Time-Dependent Hartree-Fock.
- TDL
- Technical Data Library. Branch of SLAC Library devoted to
specifications, standards, and vendor catalogs. Discontinued in
1993.
- TDM
- Transportation Demand Management.
- TDP
- Technical Design Phase. (ILC)
- TDP-1
- Technical Design Phase 1 (ILC).
- TDR
- Technical Design Report.
- TDRS
- | One in a network of communications satellites that make up
the Tracking and Data Relay Satellite System used by NASA and
other US government agencies._|
Glast Category: astronomy, hardware, operations
- TDRSS
- Tracking and Data Relay Satellite System. (GLAST)
- TDRSS
- A communication signal relay system, providing tracking and
data acquisition services between low earth orbiting spacecraft
and NASA/customer control and/or data processing facilities.
Glast Category: general
URL: http://msl.jpl.nasa.gov/QuickLooks/tdrssQL.html
- TDRSS
- | A communication signal relay system consisting of seven,
on-orbit Tracking and Data Relay Satellites in geosynchronous
orbit. These satellites provide tracking and data acquisition
services between low-earth-orbit spacecraft an|
| d NASA/customer control and/or data processing facilities.
TDRSS ground facilities consist of two functionally identical
ground terminals located at the White Sands_Complex in New
Mexico.|
Glast Category: operations
- TEA
- Triethylamine
- TEAM
- Transformational Energy Action Management.(DOE Initiative)
- TEC
- Total Estimated Cost.
- Technical Data Library
- See TDL.
- TEDE
- Total Effective Dose Equivalent.
- TEK
- Twisted Euguchi-Kawai.
- Telnet
- The Internet standard protocol for remote terminal
connection service. Telnet allows a user at one site to interact
with a remote timesharing system at another site as if the user's
terminal were connected directly to the remote computer.
- TEM
- Tower Electronics Module. (GLAST)
- TEM
- |The TEM assembles trigger primitives from the TKR and CAL
(or simulated input) to determine whether or not there has been
an event in the LAT. If so, the TEM_alerts the GLAST Electronics
Module (GEM)and communicates with the E|
|vent Builder Module.
|
Glast Category: hardware
- Ten Finger Box
- A section in the DRIP vacuum chamber where ten beam pipes
are connected together.
- TERA
- TErapia con Radiazioni Adroniche, or Therapy with Hadronic
Radiations. part of the Italian foundation for hadron therapy,
Fondazione per Adroterapia Oncologíca.
- TERA
- Thunderstorm Energetic Radiation Array. (University of
Florida/ Fl orida Tech)
- Teratogenic
- Capable of producing congenital malformations.
- Terminal
- An interactive station connected to a host computer. Can be
classified into four categories: visual display, hard copy,
graphics and emulation. A terminal emulation can be done with a
microcomputer and the appropriate software. Terminals usually
consist of a keyboard, modem or network connection, and video
display.
- Terminal Server
- A small, specialized, networked computer that connects many
terminals to a LAN through one network connection. Any user on
the network can then telnet to various network hosts. A terminal
server can also connect many networks' users to its asynchronous
ports.
- TERR
- Transmitter ERRor.
- Tertiary Treatment
- Advanced cleaning of wastewater that goes beyond the
secondary or biological stage. It removes nutrients such as
phosphorus and nitrogen and most BOD and suspended solids.
- TES
- Transition Edge Sensors.
- TESLA
- TeV Energy Superconducting Linear Accelerator (DESY)
- Tesla
- The standard unit of magnetic field strength. A typical non-
superconducting magnet has a maximum strength of approximately
two tesla.
- TESLA-XFEL
- TeV Energy Superconducting Linear Accelerator X-Ray Free-
Electron Laser. (DESY)
- TESS
- Transitory Exoplanet Survey Satellite.
- TeV
- Tera Electron Volt (1 trillion electron volts).
- TEX
- TeX (pronounced `tek'). A text processing program, available
for many computers, to create and format text output. TeX is a
free typesetting system designed by Donald Knuth.
- TeX macro
- A TeX command that invokes a pre-defined set of other TeX
commands, which may contain other TeX macros or TeX primitive
commands.
- TeX primitive
- A command native to TeX, that is, a command that TeX
recognizes when no extra macros are defined.
- TEXAS
- Totally hermetic EXperiment At the Supercollider (SSC).
- Text Processing Unit
- See TPU.
- TFBK
- Timing FeedBacK. A feedback used to stabilize kicker timing.
- TFD
- Thermo Field Dynamics
- TFT
- Topological Field Theory.
- TFXA
- Time Focused Xtal Analyzer
- TG
- Tangential Group
- TGAS
- Trigger Gate And Synchronization. A module which allows
continuous gating of the gun trigger in steps of a few
picoseconds. It uses the 178.5 MHz RF synchronized with the 119
MHz of a PDU to allow fine adjustments.
- TGC
- Triple Gauge Couplings
- TGC
- Thin-Gap Chambers.
- TGP
- Tuition Grant Program. (Stanford)
- THDM
- Two Higgs Doublet Model.
- THEO
- THEOretical or heavily model-dependent result.
- Thermocouple Reference Plane
- See TRP.
- Thermoluminescent Dosimeter
- See TLD.
- THI
- High intensity transport
- THM
- TriHaloMethane.
- THP
- THeoretical Physics. (SLAC)
- Threshold Limit Value
- See TLV.
- Threshold Planning Quantity
- See TPQ.
- THY
- Theory.
- Thyratron
- A gas filled tube used as a switching device for modulators
and for kickers. The tube holds off high voltage until its grid
is pulsed, ionizing the gas, and allowing immediate high current
flow. Its solid state equivalent is the SCR, or silicon
controlled rectifier. See SCR.
- Thyratron Reservoir
- A device for regulating the ionization gas pressure in a
thyratron.
- THz
- TeraHertz.
- TIC
- Time Interval Counter.
- Tick
- The finest timing increment in the SLC timing system. 1 tick
= 8.4 nanoseconds (119 MHz).
- TID
- Technology and Innovation Directorate. (SLAC)
- TIFF
- Tagged Information File Format.
- TILC
- The International Linear Collider (workshop).
- TIM
- Technical Interchange Meeting.
- Time Matrix
- See T-Matrix.
- Time Nominal
- See TNOM.
- Time Projection Chamber
- See TPC.
- Time Reference
- See TREF.
- Time Slot
- See TS.
- Time Slot Separation
- The timing jitter or variance between beams on different
time slots. It is caused by time varying magnetic or electric
fields not synchronous with the incoming AC phase.
- Time to Digital Converter
- See TDC.
- TIMES
- Theory Institute for Materials and Energy Sciences
- Timing Feedback
- See TFBK.
- TIPP
- Technology and Instrumentation in Particle Physics,
(Conference)
- TIS
- Technical Information Services Department.
- Title 08
- The title of the California Code of Regulations which
contains regulations promulgated by Cal/OSHA pertaining to worker
safety and health.
- Title 13
- The title of the California Code of Regulations which
contains regulations promulgated by the CHP pertaining to the
transport of hazardous materials.
- Title 19
- The title of the California Code of Regulations which
contains regulations promulgated by OES pertaining to business
emergency plans, area plans, emergency spill notification, and
community right-to-know.
- Title 22
- The title of the California Code of Regulations which
contains regulations pertaining to hazardous waste management and
other related matters as promulgated by the CDHS.
- Title 23
- The title of the California Code of Regulations which
contains regulations regarding water protection (including
underground tanks) as promulgated by the SWRCB.
- Title 26
- The title of the California Code of Regulations which
contains excerpts from other titles pertaining to toxics. This
title was created as a convenience to the user. It contains no
regulations which are not also located within another of the
first twenty-five titles.
- TIU
- Tone Interrupt Unit. The MPS system uses a 20 to 60 KHz tone
signal loop whose interruption by various machine protection
monitoring devices will cause the beam to trip off. The tone
interrupt units are the interface between the tone loop and these
devices.
- TIXEL
- TIme-resolving piXELated particle detector.
- TKR
- silicon-strip detector TracKeR (GLAST)
- TKR
- A 4x4 array of tower modules, each equipped with planes of
silicon strip detectors interleaved with tungsten converter
layers. Photon detection is based on the pair conversion process.
Glast Category: hardware
- TL
- Test Laboratory building.
- TL
- Team Leader.
- TLA
- Three-Letter Acronym.
- TLC
- TeV Linear Collider.
- TLC
- Taiwan Light Source.
- TLD
- ThermoLuminescent Dosimeter. Sometimes called a `Film
Badge.' Every SLAC employee who has to enter the area inside the
radiation fence must be issued, and carry, a TLD at all times.
- TLM
- TeLeMetry.
- TLNG
- TooLiNG
- TLNGB
- TooLiNG Ball.
- TLS
- ThermoLuminescent Sheet stack (detector). (Japan).
- TLV
- Threshold Limit Value. Maximum workplace, airborne
concentrations to which normal, healthy, adult workers may be
exposed daily without adverse effects. Determined by the American
Conference of Governmental Industrial Hygienists. Also see PEL.
- TLV-C
- TLV-Ceiling. An occupational exposure standard which should
never be exceeded.
- TLV-Ceiling
- See TLV-C.
- TLV-Short Term Exposure Limit
- See TLV-STEL.
- TLV-STEL
- TLV-Short Term Exposure Limit. An occupational exposure
standard which is a 15-minute time-weighted average which may not
be exceeded more than once in a one-hour period and no more than
four times in an eight-hour work shift.
- TLV-Time-Weighted Average
- See TLV-TWA.
- TLV-TWA
- TLV-Time-Weighted Average. An occupational exposure standard
which is a time-weighted average for a normal 8-hour work day and
40-hour work week.
- TMA
- Telescope Mount Assembly (LSST).
- TMAE
- Tetrakis diMethylAmine Ethylene.
- TMIT
- TransMitted InTensity. A sum signal derived from the 4
striplines of a BPM or from a toroid. The TMIT signal is a
running indication of the beam's transmission intensity down the
machine.
- TMR
- Tunneling MagnetoResistance
- TMS
- Travel Management System
- TMSK
- Trigger MaSK. A 36 bit mask indicating the allowable
broadcast pattern of a beam code.
- TMTP
- Test Move To Production. (OCIO)
- TMUX
- Trigger MUltipleXer. A CAMAC module which sends a pulse to
the GAP Voltage controller module.
- TNOM
- Time NOMinal. A T-Matrix or beam matrix time delay relative
to the reference beam. Can be programmed to give a single value
offset to all triggered devices in a micro for any given beam
code. Done only with BDL.
- TNRLC
- Texas National Research Laboratory Commission.
- TO
- Technical Operations.
- To Be Replaced
- See TBR.
- TOA
- |The arrival time of a signal from a cosmic source, e.g., a
radio wave from a pulsar.|
Glast Category: astronomy
- TOC
- Trigger Over Current. A Klystron SDS message.
- TOC
- Total Organic Carbon.
- TOC
- Technical Operations Committee.
- TOF
- Time-Of-Flight.
- TOFC
- Trailer On Flat Car.
- TOFF
- Time OFFset.
- TOKAMAK
- Toroidal Magnetic Chamber
- TOLS
- A set of BDES tolerances in the database for trimming and
checking a magnet.
- TOMCAT
- Server plugin that creates an environment for servlet
execution. (GLAST)
- Tone Interrupt Unit
- See TIU.
- Tone Loop
- A PPS/MPS system circulating AC signals (tone) throughout
selected beam monitoring devices which when interrupted by a
fault condition in one of the devices will shut off the machine.
It includes a tone transmitter and a tone receiver (Rx) and does
not have to be a closed loop. See TIU.
- TOO
- Target Of Opportunity.
- TOP
- Technical Operations Procedure.
- TOP
- TOP of duct.
- TOPAZ
- TOP And Z. The KEK TRISTAN solenoidal spectrometer with TPC,
time projection chamber.
- TOPS
- A network software package used to communicate between
Macintosh computers.
- TOPS
- TOp hat Pulse Shaper, a SLC Polarized Light Source
Subsystem.
- TOPS
- Technology Opportunities for increasing the proliferation
resistance of global civilian nuclear Power Systems
- TOPZ
- See TOPAZ.
- TORI
- TORoId.
- TORO
- TOROid. A beam current monitor which uses transformer action
to measure the intensity of a beam pulse. Usually placed around a
ceramic gap in the beam pipe.
- Toroid
- See TORO.
- Toroid Charge Monitor
- See TCM.
- TORR
- Named after Torricelli. A unit of pressure equivalent to
1/760 Atmosphere or 133.322 Pascals.
- TOT
- The Tracker front-end ASIC outputs a fast TOT signal that is
OR'd in a silicon plane and used as a fast OR in the trigger. It
is also used after digitization in the controller chip as an
estimator of the collected charge. I f an electron and a positron
from a gamma conversion each release a charge on a single strip,
a double TOT is expected.
Glast Category: hardware
- TOTEM
- an experiment at CERN, called Total Cross Section, Elastic
Scattering and Diffraction Dissociation.
- Toxic Cloud
- An airborne mass of gases, vapors, fumes, or aerosols
containing toxic materials.
- Toxicity
- The ability of a substance to cause injury once it reaches a
susceptible site in or on the body.
- TPa
- TeraPascal. One trillion Pascals.
- TPAP
- Transcontinental Persistent Archive Platform.
- TPC
- Time Projection Chamber. A two gamma detector formerly
located at PEP Region 2. Also, a detector for the ILC under
development at DE SY, and a detector for the LZ experiment.
- TPC
- Total Project Cost.
- TPCA
- Toxic Pits Cleanup Act. (CH&SC Sec. 25122.7, 25208-25208.17)
- TPI
- Tap changer Position Indicator
- TPQ
- Threshold Planning Quantity. (from EPCRA)
- TPS
- Tagged Photon Spectrometer (FNAL)
- TPS
- Taiwan Photon Source.
- TPU
- Text Processing Unit. A DEC utility to handle file editing
programs on the VAX. TPU is used to create MACROs for the EVE
editor.
- TPY
- Tons Per Year.
- TQ
- Technology Quadrupole.
- TQFT
- Topological Quantum Field Theory
- TR
- Travel Office.
- TRAC
- Teachers Research Associate Program.
- Track16
- Track display program for the 1.6-GeV Magnetic Spectrometer.
- Transaction Processing
- A major type of networked and shared database application
where transactions (such as purchasing an airline ticket) from
multiple simultaneous users are immediately recorded in a
database (or collection of databases), and where the database
remains in a continuous state of updated and current transition.
Transaction processing implies the existence of a robust
underlying management system that ensures the integrity of the
database against which the transactions are made, as well as the
ability to recover the database to a known point of existence in
the event of a hardware or software crash.
- Transceiver
- Transmitter-receiver. The physical device that connects a
host interface to a local area network, such as Ethernet.
Ethernet transceivers contain electronics that apply signals to
the cable and sense collisions.
- Transiac
- A brand name. It usually refers to the 16 channel DAC CAMAC
module used throughout the SLC.
- Transmission Control Protocol/Internet Protocol
- See TCP/IP.
- Transmitted Intensity
- See TMIT.
- TRANSPORT
- A computer program for designing and modelling charged
particle beam transport systems. It is a first and second order
matrix multiplication program and was developed at SLAC for
designing beam line optical systems.
- Transport Layer
- An OSI layer that is responsible for reliable end-to-end
data transfer between systems.
- TRAP
- Penning trap.
- TRB
- Technical design Review Board. (SLAC)
- TRC
- Total Recordable Cases. A rate defined as the number of
cases (accidents) per 200,000 person-hours worked per year.
- TRD
- Transition Radiation Detector
- TREF
- Time REFerence. T-Matrix and beam matrix timing delays
associated with each individual PDU. It is the time difference
between a fiducial and a bunch 1 beam BPM signal arriving at that
PDU's crate.
- TRG
- TRiGger. A klystron SDS message indicating that there are no
triggers present.
- TRI
- Toxic chemical Release Inventory.
- Trickle charge
- Procedure at SSLR where a small amount of beam is injected
every f ew minutes to keep the stored current steady to within a
fraction of a percent.
- Trigger
- See TRG.
- Trigger Gate and Synchronization
- See TGAS.
- Trigger Mask
- See TMSK.
- Trigger Multiplexer
- See TMUX.
- Trigger Over Current
- See TOC.
- Trim
- An operator command to bring a magnet current or a klystron
phase to a desired value. If a device has drifted from its book
value, `trimming' it will cause the computer to adjust it back to
the proper setting.
- Triplet
- See Final Triplet.
- TRIUMF
- TRIangle University Meson Facility (Canada)
- TRMS
- Ratio of RMS TOLS to TOLS.
- TRNARND
- TuRNARouND.
- TRO
- Travel Reimbursement Office. (SLAC)
- Trombone
- In the positron transport system, just after the positrons
are created by the source, the beam line makes a 180 degree
turnaround called `ETA.' The whole assembly, including B1 Bends,
a sextupole, and instrumentation, can physically be moved forward
or backward like a trombone slide, causing the path length to
vary. This adjusts the time of arrival of the positrons for re-
injection into the LINAC at sector 1.
- TRP
- Thermocouple Reference Plane. A cold junction used as a
temperature reference for the 15 thermocouples of a SAM.
- TRS
- Training Registration System.
- TRT
- Transition Radiation Tracker
- TRT
- Total Run Time.
- TS
- Time Slot. One of the six zero crossings of the 360 Hz 3
phase PG&E power used to generate timing fiducials. At a 120pps
rep rate, time slots 1 and 4 are used: at 60pps, time slot 1 or 4
is used.
- TS
- Test Stand (Klystron).
- TSA
- Technical Safety Appraisal.
- TSC
- Terminal Standards Committee.
- TSCA
- hazardous waste and Toxic Substance Control Act. (15 U.S.C.
Sec. 2 601 et seq)
- TSCD
- Toxic Substances Control Division. A division of California
Department of Health Services.
- TSD
- Treater, Storer, Disposer (ES&H).
- TSD Facility
- See TSDF.
- TSDF
- Treatment, Storage, or Disposal Facility (for hazardous
waste). (From RCRA.)
- TSI
- Thermal System Insulation.
- TSOM
- Transmitter Start Of Message.
- TSP
- Theory and Special Projects.
- TSP
- Total Suspended Particulate.
- TSP
- Titanium Sublimation Pump.
- TSR
- Technical Safety Requirements
- TSS
- Total Suspended Solids.
- TSSM
- TeV scale Supersymmetric Standard Model
- TT
- Transverse Tracefill
- TT
- Tiger Team.
- TTBT
- Threshold Test Ban Treaty
- TTC
- TESLA Technology Collaboration.
- TTE
- Time Tagged Event
- TTF
- TESLA Test Facility.(DESY)
- TTHMs
- Total TriHaloMethanes.
- TTIM
- A magnet parameter indicating the last time the magnet was
successfully trimmed. A magnet database secondary.
- TTLC
- Total Threshold Limit Concentration. (CCR Title 22)
- TTO
- Technology Transfer Office. (SLAC)
- TTO
- Transfer To Operations.
- TTS
- Time-To-Spill
- TTU
- Transportable Treatment Unit.
- TUD
- Tune Up Dump. A safe place to absorb beam energy during
tuning and adjustment.
- TULIP
- Trilateration Utility for Locating IP hosts.
- TUNE
- In a storage ring, the fractional part of the quotient when
the betatron oscillation frequency (or synchrotron frequency) is
divided into the go-around frequency. The whole digit part of
this quotient is called the betatron number.
- Tune
- To adjust the steering, focus, current or energy of a beam
to bring it to proper specifications.
- Tune Up Dump
- See TUD.
- Tuple
- In relational database systems, a record.
- TURTLE
- Trace Unlimited Rays Through Lumped Elements. A computer
program used to model beam transport optics by simulating the
propagation of a beam, one particle at a time.
- TV
- TeleVision camera.
- TWA
- Treatment Works Approval.
- TWAS
- Academy of Sciences for the Developing World. (Known as TWAS
for i ts original name, Third World Academy of Sciences).
- TWC
- Talk, Walk and Clean (Safety Stand-down).
- TWG
- Technical Working Group (2006).
- Twiss
- See TWSP.
- Twiss Parameter
- See TWSP.
- Twisted Pair
- Cable made up of a pair of insulated copper wires wrapped
around each other to cancel the effects of electrical noise.
- TWIXT
- Region upstream of a dipole between the two magnets.(On
LASS, twix t was downstream of the solenoid and upstream of the
dipole.)
- TWR
- Transient Waveform Recorder. A CAMAC module.
- TWSP
- TWiSs Parameter. The beam ellipse is given by the matrix:
s11 s12 b a = e s21 s22 a g, where e, b, a, g are the beam
parameters: emittance, beta function, Alpha and gamma
respectively. These parameters have historically been known as
the Twiss Parameters after the physicist R.Q. Twiss.
- TWT
- Traveling-Wave Tube.
- TWTA
- Traveling-Wave Tube Amplifiers.
- TX
- Tone Transmitter. See Tone Loop.
- TXM
- Transmission X-ray Microscopy.
- TXRF
- Total Reflection X-ray Fluorescence.
- T2K
- Tokai to Kamioka (KEK experiment).
Send corrections to jmdeken@slac.stanford.edu
or propose new terms for SLACspeak.