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SLACspeak Terms

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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.
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).
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.
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.
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.
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
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.
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.
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.
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.
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)
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.

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