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SLACspeak Terms

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A
DC steering magnet.
A
Angstrom.
A&E
Administration and Engineering. (Building 042)
A-Line
The transport line from the beam switchyard (BSY) to End Station A (ESA).
A-Scale Sound Level
A measurement of sound approximating the sensitivity of the human ear, used to note the intensity or annoyance of sounds.
A/D
Analog to Digital.
A/E
Acquisition Executive.
AA
Antiproton Accumulator. (CERN)
AAA
Advanced Accelerator Association for promoting science and technol ogy.
AAAS
American Association for the Advancement of Science
AANM
Astronomy and Astrophysics in the New Millennium. (2001)
AAO
Affirmative Action Office.
AAP
American Association of Publishers. Often used in the context of SGML as the AAP DTD
AAP
Accelerator Advisory Panel. (ILC)
AAR
Association of American Railroads.
AARD
Advanced Accelerator Research and Development
AAS
American Astronomical Society.
AAS
Advanced Accelerator Studies.
AATF
Affirmative Action Task Force
AATF
Advanced Accelerator Task Force
AB
Assembly Bill.
ABAG
Association of Bay Area Governments.
ABC
Abashian-Booth-Crowe
ABEL
EPA's computer model for analyzing a violator's ability to pay a civil penalty.
ABF
Andrews-Baxter-Forrester
ABJ
Adler-Bell-Jackiw anomaly.
ABL
Aharonov-Bergmann-Lebowitz
ABRT
ABoRT.
ABS
Atomic Beam Source.
Absolute zero
Zero on the Kelvin and Rankine scales. See Word of the Week at http://today.slac.stanford.edu/a/2008/04-11.htm.
AC
Air Conditioning or Air Conditioning unit.
AC
Antiproton Collector (CERN)
ACC
ACCounting Office.
Accelerator
Device used to produce high-energy beams of charged particles such as electrons, protons, or heavy ions for research in high -energy and nuclear physics, synchrotron radiation research, medical therapies, and some industrial applications.
Accelerator
See Word of the Week at http://today.slac.stanford.edu/a/2009/04-17.htm .
Accelerator Department Safety Office
See ADSO.
Accelerator Improvements
See AI.
Accelerator Maintenance East
See AME.
Accelerator Maintenance RF Systems
See AMRF.
Accelerator Maintenance Special Systems
See AMSS.
Accelerator Maintenance West
See AMW.
Accelerator Physics Expert
See APE.
Accelerator Status
See ACCS.
Acceptance
A measurement of the size of the beampipe aperture as applied to generalized parameters such as energy, angle, and transverse positions. The units of acceptance are the units of the particular parameter whose acceptance is being measured or defined. Geometric acceptance is the emittance at which 90% or some arbitrary fraction of the beam is transmitted through the available aperture. Energy acceptance is the energy range at which 90% or some arbitrary fraction of the beam energy is transmitted through the pipe. See also Emittance.
Accident Site
The location of an unexpected occurrence, failure or loss, either at a plant or along a transportation route, resulting in a release of hazardous materials.
ACCM
ACCMOR Collaboration.
ACCMM
Altarelli-Cabibbo-Corbo-Maiani-Martinelli
ACCMOR
Amsterdam-CERN-Cracow-Munich-OxfoRd
ACCS
ACCelerator Status. A database primary.
ACD
Advanced Conceptual Design.
ACD
Analytic Continuation by Duality
ACD
Anti-Coincidence Detector (GLAST).
ACD
|Subsystem designed to detect incident cosmic ray charged particles. Data from the ACD is used to distinguish Gamma-rays from cosmic rays, and can be used to study cosmic ray sources alone, or to filter out cosmic ray background| | during studies of Gamma-ray sources.|
  Glast Category: hardware
ACD
Advanced Computations Department. (SLAC)
ACDS
Administrative Controlled Document System. (SLAC)
ACE
Astrophysical Composition Explorer.
ACE3P
Advanced Computational Electromagnetics 3-D Parallel. A software s uite used to run accelerators.
ACFA
Asian Committe for Future Accelerators.
ACGIH
American Conference of Governmental Industrial Hygienists. This group is best known for developing TLVs for occupational chemical exposures.
ACH
Air Changes per Hour. The movement of a volume of air in a given period of time. If a house has one air change per hour, it means that all of the air in the house will be replaced in a one- hour period.
Achromat
The concrete girders, or cells, in the SLC arcs are called 'achromats' because their magnetic optics are designed to be achromatic. A beam line is called achromatic when its beam transport characteristics do not change momentum. For convenience of construction and operation, the arcs are divided into 23 subsections, each made up of 20 magnets. Each subsection is called an achromat.
ACI
American Competitiveness Initiative.
acid
A large class of substances having a ph less than 7. An acid waste is considered hazardous when its pH is 2.0 or less.
ACKS
Astro/CSSA/KIPAC/SLAC (Seminar series).
ACL
Alternate Concentration Limit or Administrative Control Level.
ACL
Access Control List
ACM
Asbestos Containing Materials
ACME
Advanced Cosmic Microwave Explorer
ACP
SSRL Accelerator Systems Department, Accelerator Development and Controls Group.
ACR
Accelerator Control Room.
ACS
Access Control System.
ACSR
Advanced Science Computing Research. (DOE)
ACT
Atmospheric Cerenkov Telescope.
Activated Carbon
A highly adsorbent form of carbon used to remove odors and toxic substances from liquid or gaseous emissions. In waste treatment it is used to remove dissolved organic matter from wastewater. It is also used in motor vehicle evaporative control systems.
Activated Sludge
Sludge that results when primary effluent is mixed with bacteria-laden sludge and then agitated and aerated to promote biological treatment. This speeds breakdown of organic matter in raw sewage undergoing secondary waste treatment.
Activated Sludge Treatment
Exposing waters to microorganisms and air. A portion of the organic matter is oxidized to carbon dioxide and water and the other portion is synthesized into new microbial cells.
ActiveX
A loosely defined set of technologies developed by Microsoft. ActiveX is an outgrowth of two other Microsoft technologies, called OLE (Object Linking and Embedding) and COM (Component Object Model).
ACTS
see DOE ACTS
Acute Effects
Toxic effects which occur over a relatively short period of time (minutes, hours). See also Chronic Effects.
Acute Toxicity
A quantitative measure of the effects of a toxic agent administered once or only a few times over a short period of time, e.g., 24 hours. See also Chronic Toxicity.
ACWP
Actual Cost of Work Performed.
AD
Accelerator Department.
AD
Antiproton Decelerator (CERN)
AD
Associate Director.
AD&I
Accelerator Design & Integration. (ILC)
ADA
Anello Di Accumulazione. Italian half-meter diameter positron- electron asymmetric ring. Built in 1961.
ADA
Americans with Disabilities Act.
ADC
Analog to Digital Converter.
ADC
Analog-to-Digital Converter.
ADC Tolerance
See ATOL.
ADCC
See ADCOC.
ADCOC
Associate Directors' Committee on Computing.
ADCP
Pointer to ADC location in buffer. (%ADC n + CH m) where n is the ADC number o ...M is the channel number. A magnet VAX database secondary.
ADD
Arkani-Hamed, Dimopoulos, and Dvali (1998)
Address Resolution
Conversion of an Internet address to the corresponding physical address.
Address Resolution Protocol
See ARP.
ADE
ADE refers to the A_n, D_n and exceptional E_n Lie Groups. These are the Lie groups with only single lines in their Dynkin diagrams.
ADEPT
Advanced Dark Energy Physics Telescope.
ADHM
Atiyah-Drinfeld-Hitchin-Manin.
ADHMN
Atiyah-Drinfeld-Hitchin-Manin-Nahm.
ADI
Angular Differential Imaging.
ADM
Arnowitt-Deser-Misner
Administrative Order On Consent
A legal agreement signed by EPA and an individual, business, or other entity through which the violator agrees to pay for correction of violations, take the required corrective or cleanup actions, or refrain from an activity. It describes the actions to be taken, may be subject to a comment period, applies to civil actions, and can be enforced in court.
ADMO
Accelerator Division Maintenance Office.
ADONE
Italian 1.5 GeV electron-positron collider. In operation 1969-1993 (Frascati)
ADP
Automated Data Processing
ADS
Anti-De Sitter
ADs
Associate Directors.
ADS
Activity Data Sheet.
ADS
Astrophysics Data System. (SAO/NASA)
ADS
Accelerator-Driven machine concept. (Europe)
ADSL
Asymmetric Digital Subscriber Line. A technology that allows more data to be sent over existing copper telephone lines. ADSL supports data rates from 1.5 to 9 Mbps when receiving data (downstream rate) and from 16 to 640 Kbps when sending data (upstream rate).
ADSO
Accelerator Directorate Safety Office.
Adsorption
Gathering a gas, liquid, or dissolved substance on a surface (e.g., charcoal adsorbs gases.) Can be used to remove low concentrations of organic materials from gaseous and watery waste streams.
ADST
Asymptotic Disappearance of Space-Time.
ADTT
Accelerator-Driven Transmutation Technology
Advanced Projects Research Agency
See ARPA.
Advanced TCA
Advanced Telecommunications Computing Architecture.
Advanced Wastewater Treatment
Any treatment of sewage that goes beyond the secondary or biological water treatment stage and includes the removal of nutrients such as phosphorus and nitrogen and a high percentage of suspended solids. See Primary Waste Treatment and Secondary Treatment.
AdvLIGO
Advanced Laser Interferometer Gravitational-wave Observatory.
AD2
Antiproton Decelerator (CERN)
AE
Architect / Engineer.
AEC
Atomic Energy Commission. Superseded by the Energy Research and Development Agency (ERDA), which in turn was superseded by the Department of Energy (DOE). Established 1 August 1948, superseded 11 October 1974.
AECM
Architectural Engineering Construction Management.
AED
Automated External Defibrillator.
AED or AE
Accelerator Engineering Division.(SLAC)
AEESP
Association of Environmental Engineering and Science Professors.(C anada)
AEL
Accessible Emission Limit.
AEMCBP
Advances in Experimental Methods for Colliding Beam Physics.
AEMS
Argonne Effective Mass Spectrometer.
Aerobic
Occurring in the presence of free oxygen.
aerogel
extremely light, diaphanous substance used in the threshold Cherenkov counter in BELLE.
AES
Advanced Energy Systems.
AES
Auger Electron Spectroscopy.
AES
Advanced Engineering Staff (General Motors).
AFB
Air Force Base
AFEE
Per tower, each of 4 Calorimeter AFEE boards processes the outputs from 4 GCRC ASICs, and sends eight Trigger Requests to the Tower Electronics Module (TEM): 4 High-Energy requests and 4 Low-Energy requests.
  Glast Category: hardware
AFF
Above Finished Floor.
AFFF
Aqueous Film-Forming Foam. Contains fluorocarbon surfactants to change the surface tension of water such that it will float on hydrocarbon compounds in which it would normally sink, thereby enhancing firefighting.
AFM
Atomic Force Microscopy.
AFP
Approved Funding Plan.
AFS
A widely used Unix network file facility allowing file sharing among machines many thousands of miles apart. AFS is descended from a distributed file system developed at Carnegie Mellon University and was originally called the "Andrew File System" in honor of Andrew Carnegie.
AG
Alternating Gradient.
AGASA
Akeno Giant Air Shower Array.
AGC
Automatic Gain Control.
AGF
Alternating Gradient Focusing magnet. The SLAC arcs are made up of AGF magnets. See also Achromat.
AGK
Abramovskii-Gribov-Kancheli
AGN
Active Galactic Nuclei. A class of galaxies which spew massive amounts of energy fromcross their centers and have a much higher than normal luminosity acros she electromagnetic spectrum. This radiation is often attributed to supermassive black holes th at may lie at the center of these galaxies and power their explosive energy output.
  Glast Category: astronomy
AGOR
l'Accelerateur Groningen-ORsay. a cyclotron resulting from collaboration between KVI and IPN.
AGS
Alternating Gradient Synchrotron (Brookhaven)
AGUT
Anti-Grand Unification Theory.
AH
Air Handler.
AHA
Area Hazard Analysis.
AHERA
Asbestos Hazard Emergency Response Act of 1986. (Federal)
AHJ
Authority Having Jurisdiction.
AHM
Acutely Hazardous Material. (CH&SC Sec. 25532 et seq)
AHU
Air Handler Unit.
AI
Artificial Intelligence. The branch of computer science that studies how smart a machine can be, which involves the capability of a device to perform functions normally associated with human intelligence, such as reasoning, learning, and self-improvement.
AI
Accelerator Improvements. A class of DOE funding.
AICHE
American Institute of CHemical Engineers.
AIDA
Accelerator Integrated Data Access. A software service in the acce lerator complex, which allows scientific software applications to access the various kinds of data necessary for control and optimiz ation of the beam. For instance, control data, mathematical models , archived data, static data in Oracle, etc. See http://www.slac.s tanford.edu/grp/cd/soft/aida/.
AIDA
Organization founded to help development of software tools for academic scientific research in an international, collaborative way. (See AIDA website.)
  Glast Category: organization
  URL: http://wwwasd.web.cern.ch/wwwasd/lhc++/AIDA/
AIDA
Advanced european Infrastructures for Detectors and Accelerators.
AIHA
American Industrial Hygiene Association.
AIL
Agreement of Associated International Laboratory (France and Japan ).
AIP
Accelerator Improvement Project.
AIP
American Institute of Physics.
AIPE
American Institute of Plant Engineers.
Air Changes per Hour
See ACH.
Air Pollutant
Any substance in air which could, if in high enough concentration, harm humans, other animals, vegetation, or material. Pollutants may include almost any natural or artificial composition of matter capable of being airborne. They may be in the form of solid particles, liquid droplets, gases, or in combinations of these forms. Generally, they fall into two main groups: 1) those emitted directly from identifiable sources and 2) those produced in the air by interaction between two or more primary pollutants, or by reaction with normal atmospheric constituents, with or without photoactivation. Exclusive of pollen, fog, and dust, which are of natural origin, about 100 contaminants have been identified and fall into the following categories: solids, sulfur compounds, volatile organic chemicals, nitrogen compounds, oxygen compounds, halogen compounds, radioactive compounds, and odors.
Air Quality Control Region
An area--designated by the federal government--in which communities share a common air pollution problem. Sometimes several states are involved.
AIS
Advanced Instrumentation Seminars.
AISC
American Institute of Steel Construction.
AJAX
Asynchronous Javascript and XML.
AKHEP
Association of Korean High Energy Physicists.
AKNS
Ablowitz-Kaup-Newell-Segur
AL
Ablowitz-Ladik
ALARA
As Low As Reasonably Achievable.
ALBA
New third-generation synchrotron light source located near Barcelo na, Spain, scheduled to open in 2010.
ALCOR
Algebraic Coalescence Rehadronization
Alcove
A room located in each klystron gallery sector housing a micro and other controls and hardware for a LINAC sector. The areas housing electronics in the arcs are also called `alcoves.'
ALCPG
American Linear Collider Physics Group.
ALCSC
Asian Linear Collider Steering Committee.
ALD
Associate Laboratory Director (SLAC)
Alderson phantom
A human skeleton enclosed in plastic tanks filled with tissue-equivalent liquids containing the same trace elements as are found in human bodies. Used under controlled conditions to safely determine radiation exposure.
ALE
Asymptotically Locally Euclidean
ALEP
ALEPH - CERN LEP detector.
ALEPH
CERN-LEP detector
ALICE
large ion collider detector experiment at the CERN LHC.
ALICE
Alpha LInux Cluster Engine.
ALLM
Abramowicz-Levin-Levy-Maor
ALMA
Atacama Large Millimeter Array telescope. (Chile)
ALP
Annual Laboratory Plan.
Alpha
Generally refers to a Twiss parameter measuring the rate of change of Beta, used in studies of accelerator optics.
ALPHA
Antihydrogen Laser PHysics Apparatus.
Alpha Magnet
A dipole magnet designed to bend the beam through a sharp angle (in the shape of the Greek letter Alpha). For example, an alpha magnet is used to bend the beam out of the NPI injector back into the linac
ALPS
Any Light Particle Search. (DESY)
ALS
Advanced Light Source.
ALS
Advanced Life Support.
ALTA
Alberta Large-scale Time-coincidence Array.
Alternating Gradient Focusing Magnet
See AGF.
AMANDA
Antarctic Muon And Neutrino Detector Array
AMBASS
AMBASSador. A model of computer terminal manufactured by Ann Arbor Corporation.
Ambassador
See AMBASS.
AMD
Antisymmetrized Molecular Dynamics.
AME
Accelerator Maintenance East. Part of PCD.
AMEP
Assistant Manager for Energy Programs.
American Conference of Governmental Industrial Hygienists
See ACGIH.
American National Standards Institute
See ANSI.
AMJ
AMplitude Jitter. A klystron summary display message indicating jitter in the klystron output.
AMM
AMplitude Mean. A klystron Summary Display message indicating that the klystron mean amplitude is out of tolerance.
AMO
Atomic, Molecular, and Optical physics.
AMplitude Jitter
See AMJ.
Amplitude Mean
See AMM.
AMR
Adaptive Mesh Refinement
AMRF
Accelerator Maintenance RF Systems. This is the department responsible for the maintenance of Linac klystrons, DR klystrons, klystron vacuum pumps power supplies, pulsed RF systems, phase and RF cooling water systems (formerly called `Gallery Maintenance').
AMS
Alpha Magnetic Spectrometer (PSI). An experiment to detect antimatter and dark matter in space.
AMS
Acquisitions Management System. (Purchasing)
AMSB
Anomaly Mediated Symmetry Breaking.
AMSS
Accelerator Maintenance Special Systems. The group responsible for the maintenance of the kickers. There are approximately a dozen kicker systems on the SLC experiment. See also Kicker.
AMW
Accelerator Maintenance West. Part of PCD.
AMY
AMY detector at KEK-TRISTAN.
Analog Status
See ASTS.
Angstrom
See Word of the Week at http://today.slac.stanford.edu/a/2008/04-25.htm.
ANITA
ANtarctic Impulsive Transient Antenna.
ANL
Argonne National Laboratory.
Annihilation
See Word of the Week http://today.slac.stanford.edu/a/2008/10-31.htm.
Anonymous FTP
A method for downloading public files using the File Transfer Protocol (FTP). Anonymous FTP is called anonymous because you don't need to identify yourself before accessing files.
ANP
Adler-Nussinov-Paschos.
ANS
American Nuclear Society.
ANSI
American National Standards Institute. The Institute disseminates basic standards like ASCII, and acts as the United States' delegate to the ISO. Standards can be ordered by writing to the ANSI Sales Department, 11 West 42nd Street, New York, NY 10036, or by telephoning 212.642.4900
Antagonism
The interaction of two chemicals having an opposing, or neutralizing effect on each other, or--given some specific biological effect--a chemical interaction that appears to have an opposing or neutralizing effect over what might otherwise be expected.
Anti-Degradation Clause
Part of federal air quality and water quality requirements prohibiting deterioration where pollution levels are above the legal limit.
Anti-Preprints
A section in PPF (Preprints in Particles and Fields) published by the SLAC Library, which lists publication information for former 'preprints.' Available from SLAC's ftp server at: ftp://preprint. slac.stanford.edu/preprints/Miscellaneous/
Antibodies
Proteins produced in the body by immune system cells in response to antigens, and capable of combining with antigens.
AO
Adaptive Optics.
AOD
Analysis Object Data.
AOG
Accelerator Operations Group.
AOPDF
Acousto-Optic Programmable Dispersive Filter (the Dazzler). LCLS
AORR
Accelerator Operations Readiness Report.
AOS
Array Operations Site. (ALMA telescope - Chile).
AOS
|Orbital event at which GLAST establishes a communications link with a TDRSS satellite or with a ground station. Operations personnel consult the AOS schedule at the start of each shift as they prepare to monitor the LAT during | |real-time contacts.|
  Glast Category: operations, spacecraft
AOS
Accelerator Operations and Safety. (SLAC) See Also AOSD.
AOSD
Accelerator Operations and Safety Division. (SLAC Accelerator Dire ctorate)
AOT
ADC Out of Tolerance. A MCC klystron CUD message.
AP
Alogorithm processor.
AP
pulse steering magnet.
APAC
Asian Particle Accelerator Conference.
Apache Web Server
A public-domain Web server developed by a loosely-knit group of programmers. The first version of Apache, based on the NCSA http daemon Web server, was developed in 1995. Because it was developed from existing NSCA code and various patches, it was called "a patchy web server." Sophisticated features, excellent performance, and low price (it's free), have made Apache the world's most popular Web server. By some estimates, in 1999 it hosted more than 50% of all Web sites in the world.
APAF
Advanced Plasma Acceleration Facility. (proposed)
APARS
Advisory Panel on Accelerator Radiation Safety.
APB
Administrative Panel on Biosafety. (Stanford University)
APCA
Air Pollution Control Association.
APCD
Air Pollution Control District. (CH&SC Sec. 40000 et seq)
APD
Avalance PhotoDiodes
APE
Accelerator Physics Expert. A person recording incidents and problems during operations of the SLC in order to collect data for analysis and improving operation efficiency. Also called `Machine Physicist.'
APE
Array Processor Elements, a European project involving INFN, DESY, and the University of Paris-Sud.
APEL
Accounting Processor for Event Logs.
APEL
Accounting Processor for Event Logs.
APENext
Array Processor Experiment/Next. (Supercomputer)
Aperture
In optics, the effective diameter of a lens or mirror. In accelerator terminology, a measure of the transport line's effective opening.
APEX
Accelerator Physics EXperiment.
API
American Petroleum Institute.
API
Application Program Interface. A set of calling conventions defining how a service is invoked through a software package.
APIARY
An early acronymn for the B Factory. Alper Garren, an LBL accelerator physicist who first designed the lattice for what is now referred to as PEP-II, or the B Factory, coined the phrase 'Asymmetric Particle Interactions Accelerator Research Yard.' Pier Oddone at LBL used an alternate version that captured the physicist's perspective of the high luminosity: 'Asymmetric Particle Interactions At Roaring Yield.'
APM
Automated Plate Measurement
APM
Automated Photographic Measuring
APM
Assurance Program Manager.
APPEC
AstroParticle Physics European Coordination.
Applet
A dynamic and interactive program written in the Java language, which can run inside a Web page displayed by a Java- capable browser.
Application Layer
The top-most layer in the OSI Reference Model providing such communication services as electronic mail and file transfer.
Application Server
A server dedicated to running specific applications (for example, a communications server).
Apron
The floor area in the CEH. Some Power Supplies and SLC controls hardware are located on the apron. In any sunken experimental collision area, the apron is the edge at ground level, and the sunken area is called the `pit.'
APS
Advanced Photon Source (x-ray facility) at the Argonne National Laboratory near Chicago, Illinois.
APS
American Physical Society
APT
Accelerator Production of Tritium
APU
Atomic Parity Violating
APUL
Accelerator Project to Upgrade LHC.
AQMD
Air Quality Management District.
AQS
Air Quality Standards.
Aqueous Film-Forming Foam
See AFFF.
Aquifer
A geologic formation that contains sufficient saturated permeable material to yield significant quantities of water to wells and springs.
ARA
Accelerator Research Department - A
ARAA
Annual Review of Astronomy and Astrophysics.
ARAC
Atmospheric Release Advisory Capability.
ARB
Air Resources Board. (CH&SC Sec. 39500 et seq)
ARB
Accelerator Research Department - B
Arc
One of the two curved, caliper-shaped transport lines of the SLC which transport the two beams from the switchyard to the final focus area for collision. Since the arcs are curved and without klystron accelerator stations, about two GeV of beam energy is lost in each arc. See also Achromat.
ARCADE
Absolute Radiometer for Cosmic And Diffuse Emission.
ARCAS
Arillaga Recreation Center At SLAC.
ARCM
Arc Magnet
Arcmin
A measure of arc length: one arcmin is 1/60 degree.
  Glast Category: astronomy
ARCS
Accelerator Resonantly Coupled Energy Storage
Arcsec
A measure of lengths of arc. One arcsec is 1/60 arcmin.
  Glast Category: astronomy
ARD
Accelerator Research Division (SLAC).
ARDA
Accelerator Research Department A (SLAC)
ARDB
Accelerator Research Department-B
ARDB
Accelerator Research Department B (SLAC)
Area of Review
In the UIC program, the area surrounding an injection well tht is reviewed during the permitting process to determine whether the injection operation will induce flow between aquifers.
Area Source
Any small source of non-natural air pollution that is released over a relatively small area but which cannot be classified as a point source. Such sources may include vehicles and other small fuel combustion engines.
ARF
Ancillary Response Files.
ARG
Accident Response Group.
ARG
ARGUS detector at DORIS.
ARGO
Astrophysical Radiation with Ground-based Observatory. (Tibet)
ARGOS
Advanced Research and Global Observation Satellite. A US Air Force low earth orbit satellite launched in 1999 carrying the USA experiment (among others).
ARGUS
A complete particle detector, upgraded with a microvertex drift chamber for B-meson physics, at DESY DORIS-II.
ARL
Archives and Research Library.
ARM
SSRL Accelerator Systems Department, Accelerator and FEL Physics Group.
AROD
Accelerator Research and Operations Division.
ARP
Address Resolution Protocol. The Internet protocol used to dynamically map Internet addresses to physical (hardware) addresses on local area networks. Limited to networks that support hardware broadcast.
ARPA
Advanced Research Projects Agency. Former name of DARPA, the government agency that funded ARPANET and later the DARPA Internet.
ARPANET
A pioneering long haul network funded by ARPA. It served as the basis for early networking research as well as a central backbone during the development of the Internet. The ARPANET consists of individual packet switching computers interconnected by leased lines.
ARPES
Angle-Resolved PhotoEmission Spectroscropy. Technique pioneered at Stanford and at SLAC to study the behavior of complex materials. Uses a high-resolution spectrometer to detect electrons emitted from the surfaces of materials subjected to intense X-ray beams.
ARR
Accelerator Readiness Review.
ARR
Message sent automatically by the LAT or the GBM to the Spacecraft when either instrument suspects a Gamma-ray Burst is in progress. The Spacecraft evaluates the request and - if orbital conditions allow - may slew into a mor e direct viewing angle, notifying the LAT, the GBM, and the ground of the action taken.
  Glast Category: spacecraft
ARRA
American Recovery and Reinvestment Act (2009).
ART
Algebraic Reconstruction Technique
ART
Americas Regional Team (ILC).
ARTEMIS
Accelerator Remedy Trouble Entry and Maintenance Information Syste m.
Artesian Aquifer
An aquifer in which ground water is confined under pressure significantly greater than atmospheric pressure. Also known as a Confined Aquifer.
Artificial Intelligence
See AI.
AS
Australian Synchrotron.
ASACUSA
Atomic Spectroscopy And Collisions Using Slow Antiprotons. A Japanese-European collaboration at CERN. (Also the name of a famous temple district in Tokyo.)
ASCII
American Standard Code for Information Interchange. Defines a 7-bit internal computer code for storing 128 letters, numbers, punctuation, and control codes. ASCII is used on almost all computers except some IBM mainframes (see EBCDIC). There is also an 'extended ASCII' which provides for 256 characters.
ASCR
Advanced Scientific Computing Research (DOE).
ASD
Accelerator Systems Development / Department. (SSRL)
ASD
Accelerator Systems Division.
ASDC
|Established in November 2000, the Italian ASI Science Data Center supports ASI scientific missions for all matters concerning the management and archival of scientific space data and all ASI scientific missions. It also serves| | as the interface between the ASI scientific missions and the users' community.|
  Glast Category: astronomy, management
  URL: http://www.asdc.asi.it/right.html
ASE
Accelerator Safety Envelope.
ASEB
Aeronautics and Space Engineering Board.
ASER
Annual Site Environmental Reports.
ASG
Advanced Study Group (of the Max Planck Society).
ASGC
Academia Sinica Grid Center.
ASHRAE
American Society of Heating, Refrigerating and Air- conditioning En gineers.
ASIC
Application Specific Integrated Circuits.
ASLS
Advances Synchrotron Light Source.
ASME
American Society of Mechanical Engineers.
ASO
Accelerator Systems Operator.
ASOD
Accelerator Safety and Operations division, Accelerator Directorat e.
ASOS
Absolute value Solid-On-Solid
ASP
Anomalous Single Photon detector and experiment at PEP.
ASP
|ASP products provide a 'Quick Look' at LAT data in order to alert the scientific community of time-critical transient events (GRBs and other transient sources). Light curves are also provided for a predefined list of sources.|
  Glast Category: software
ASP
Astronomical Society of the Pacific.
ASPENS
Astrometric Search for Planets Encircling Nearby Stars.
ASPERA
AStroParticle European Research Area.
ASPK
Automatic SParK chambers.
ASRF
Accelerator Systems and Research Facilities. (SLAC)
ASRP
Australian Synchrotron Research Program.
ASSET
Accelerator Structure SET-up. A SLAC experiment to test future linear colliders. A three-meter beam line space in linac sector two has been reserved to test X-band structure.
Assimilation
The ability of a body of water to purify itself of pollutants.
ASST
Accelerator Systems String Test
ASTA
Accelerator Structure Test Area.
ASTB
As Sent To Bidder.
ASTE
ASTErix detector at LEAR. (CERN)
ASTeC
Accelerator Science and Technology Centre. (UK)
ASTM
American Society for Testing and Materials.
ASTR
Astronomy.
ASTRO-H
A satellite planned for launch by Japan in 2013.
Astronym
Astronomical acronym.
Astro2010
National Academy of Sciences' National Research council report New words, new Horizons in Astronomy and Astrophysics, released 8/13/ 2010.
ASTS
Analog STatuS. An SLC VAX primary.
ASW
Accelerator Safety Workshop.
Asymptotic freedom
The decrease,at high energy,of the strong force between quarks.
Asynchronous
Transmission by individual bytes, not related to specific timing on the transmitting end.
AT
Ampere Trip.
ATA
Allen Telescope Array.
ATA
Activity Training and Authorization. When signed by the worker and their supervisor, this document authorizes and releases a worker t o perform activities in their resident area. It is valid for one year.
ATA
Document describing activities, boundary conditions, hazards, controls, and training requirements, used to authorize and release an employee to perform resident activities __
  Glast Category: management
ATB
Augmented Technical Board.(BaBar)
ATCA
Australia Telescope Compact Array
ATCA
Advanced Telecommunications Computing Architecture.
ATF
Accelerator Test Facility / Advanced Test Facility.
ATF2
Accelerator Test Facility 2 (KEK).
ATHENA
AnTiHydrogEN Apparatus (CERN).
ATIC
Advanced Thin Ionization Calorimeter
ATLAS
A Toroidal LHC ApparatuS. (A general purpose dectector at the LHC at CERN).
ATM
Asynchronous Transfer Mode
ATO
Authority To Operate. (DOE)
ATOL
ADC TOLerance. A VAX magnet database secondary. The loose tolerance on desired current. Used for calibration, standardization, and for diagnostic knobs.
ATOM
Area Telecommunications Office Motivator
Atomic Energy Commission
See AEC.
ATR
Advanced microwave Technology Research department. (SLAC)
ATRAP
Antihydrogen TRAP.
ATS
List of commands that the spacecraft will automatically execute at specified times. An ATS load contains a week's worth of commands and cannot be edited in progress.
  Glast Category: operations
ATS
Action Tracking System. (Replaced CATS)
ATSDR
Agency for Toxic Substances and Disease Registry. (Federal)
ATST
Advanced Technology Solar Telescope.
ATT
Package that supplies routines used by other FSW subsystems to transform local (LAT) geometric coordinates to J2000 inertial coordinates.
  Glast Category: FSW, package
Attached Resource Computer Network
See ARCnet.
Attenuation
The process by which a compound is reduced in concentration over time, through adsorption, degradation, dilution, and/or transformation.
Attosecond
One billionth of one billionth of a second.
ATW
Accelerator-Driven Transmutation of nuclear Waste. A proposed Japanese Atomic Energy Research Institute (JAERI) facility that, if constructed, would bombard long-lived radioactive isotopes with neutrons to convert them into more stable isotopes.
ATWD
Analog Transient Waveform Digitizers (NESTOR).
AU
Astronomical Units
AURA
Association of Universities for Research in Astronomy. It is an organization of various universities and other non-profit and educational institutions.
Auston switch
Switch made of semiconductor material and triggered by an ultrafas t optical laser. Passes an extremely short-lived current when hit by a photon.
Authentication
The process of identifying an individual, usually based on a username and password. In security systems, authentication is distinct from authorization, which is the process of giving individuals access to system objects based on their identity. Authentication merely ensures that the individual is who he or she claims to be, but says nothing about the access rights of the individual.
Autoignition Temperature
The temperature at which a material (solid, liquid, or gas) will self-ignite and sustain combustion in the absence of a spark or flame.
Auxiliary Door
Any door between two PPS areas. An internal door in a PPS controlled zone.
AV
Anti-Virus. (Computing)
AWG
Analysis Working Group (BaBar).
AWK
Aho, Weinberger, and Kernighan. A Unix programming language for analyzing and manipulating text files.
AXAF
Advanced X-Ray Astrophysics Facility.

Send corrections to jmdeken@slac.stanford.edu or propose new terms for SLACspeak.

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