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SLACspeak Terms

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R
Region.
R
Roentgen.
R&D
Research and Development.
R-Matrix
A transport matrix which describes the path of a charged particle through a magnet lattice. It may be used to calculate the position and angle of a particle at point B from a known position and angle at point A.
RA
Radiation Area.
RA
Return Air.
RAB
Receiver ABort.
RACT
Reasonably Available Control Technology (from CAA).
RAD
Radiation Absorbed Dose. A unit of absorbed dose of radiaion. One RAD of absorbed dose is equal to .01 joules per kilogram.
RADCON
Radiological Control manual.
Radiation Absorbed Dose
See RAD.
Radiation Physics
See RP.
Radiological Worker
Worker whose job assignment requires work on, with, or in the proximity of radiation-producing machines or radioactive materials. A radiological worker has the postential of being exposed to more than 0.1 rem (1 mSv) per year, which is the sum of the dose equivalent from external irradiation and the committed effective dose equivalent from internal irradiation. A "radiological worker" may also be referred to as a "radiation worker" or a "rad worker."
Radionuclides
Atoms which give off various radiations through spontaneous nuclear events.
RAID
Redundant Array of Independent/Inexpensive Disks.
RAIRS
Reflection Absorption Infrared Spectroscopy
RAL
Rutherford Appleton Laboratory (UK).
RAM
Random Access Memory.
RAM
RadioActive Material.
RAMM
Remote AMplifier Monitor. A SLC VAX primary.
RAMSY
RadioActive Materials Storage Yard.
Random Variable
In probability theory, the event whose probability of occurrence is in question is the `random variable.'
RAP
Remedial Action Plan.
RARP
Reverse Address Resolution Protocol. The Internet protocol a diskless host uses to find its Internet address at startup. RARP maps a physical (hardware) address to an Internet address.
RAS
Russian Academy of Science.
RAS
Reliability, Availability, and Serviceability. Part of ATCA speci fications.
RASICAM
Radiometric All-Sky Infrared CAMera. (SLAC)
RASK
Restricted Access Safety Key. Used to enable magnets to be tested while personnel are present in an area where the power supplies are normally interlocked off with the PPS system. The RASK key circumvents the normal protection interlock system, and must be used under a strict set of operational procedures that are designed to prevent accidents during the magnet test.
Rate LIMit
See RLIM.
RA1 - RA6
Rate (0 through 120) on time slots 1 through 6.
RB
Reverse Bend. The section near the upstream end of each SLC arc where the curvature changes direction so that the beams can be steered around toward the IP.
RCA
Radiologically Controlled Area.
RCBC
Rapid-Cycling Bubble Chamber.
RCE
Reconfigurable Cluster Element. (ATLAS)
RCF
RHIC Computing Facility, located at BNL.
RCFT
Rational Conformal Field Theory
RCM
Radiological Control Manager
RCMBNR
ReCoMBiNeR.
RCNP
Research Center for Nuclear Physics
RCRA
Resource Conservation and Recovery Act. (42 U.S.C. Ch. 82, Sec. 6901 et seq)
RD
Research Division. A SLAC organizational group.
RDBMS
Relational DataBase Management System.
RDC
Remote Desktop Connection.
RDDS
Rounded Damped-Detuned Structure
RDDS
Rounded Damped Detuned Structures. (NLC)
RDF
Radical Distribution Function
RDR
Reference Design Report (ILC).
RDTS
Rausch De Traubenberg and Slupinsky
RE
Klystron Reflected Energy. A klystron summary display message indicating problems with reflected energy. See also RP.
REA
Registered Environmental Assessor. (CH&SC Sec. 25570 et seq)
REC
REConstruction of the physical properties of events (data). (HEP)
Recharge Zone
A land area where rainwater, or infiltration from surface streams or impoundment areas or other sources soaks into the ground and enters an aquifer.
RED
Research Engineering Department. (SLAC)
REDE
Resonance depolarization.
Reduced Instruction Set Computer
See RISC.
Reflected Power
An RF engineering parameter that indicates the quality of impedance matching between any two power devices in an RF system. The lower the reflected power, the better the impedance match at any given frequency.
Refractory Organics
Organic compounds which are resistant to decomposition through burning or high temperature treatment.
Refrigerated Baffle
See DPS.
REG
Research Electronics Group.
REG
Research Engineering Group.
Regional Response Team
See RRT.
REL
Recommended Exposure Level. (from NIOSH)
Relativistic
A mechanical or electrical system that involves velocities close enough to the speed of light to require the formulas of relativistic mechanics is said to be `relativistic.' If the velocities involved in the system are far enough sub-light to be approximated by Newtonian mechanics, then the system is said to be `non-relativistic.'
Release Manager
Release Manager (RM) software makes a build each time a new version of a package is checked in, whether for GlastRelease, BeamtestRelease, EngineeringModel, or ScienceTool software. It also runs a series of tests to ensure interoperablility with other packages that have been checked in.
  Glast Category: software, SAS, package
REM
Roentgen Equivalent Man. A unit of radiation absorbed by a person. A `q' multiplication factor is used to adjust for different type of radiation (having differing effects on the human body).
REM
Readiness and Emergency Management Team (ES&H).
REML
Radiological Environmental Monitoring Laboratory.
Remote Amplifier Monitor
See RAMM.
Remote Procedure Call
See RPC.
Remote Procedure-Co-System
A subset of a distributed computing environment that includes a programming library, network-resource mapping, and binding services. These tools provide the means for client processes to execute procedures on a remote server.
REMP
Radiological Environmental Monitoring Plan.
RENO
Reactor Experiment for Neutrino Oscillations. (Korea)
REPMM
Rare Earth Permanent Magnet Multipoles.
REPMM
Rare Earth Permanent Magnet Material.
Reportable Occurrence
A DOE administrative definition. Reportable occurrences are defined by D0E order 5000.3A. and include all emergencies and unusual occurrences. These events are reported by the EOIC in a Notification note book (a binder on the MCC Console desk).
Reportable Quantity
See RQ.
RES
RESonant.
RESA
Research Equipment Storage and Assembly.
Research Yard
The area east of the BSY and including End Stations A, B, and C. This term is not generally used for the SLC collider hall or any facilities east of Beam Dump East.
Restricted Access
A PPS beam housing access status designed to allow the safe operation of electrical hazards in the beam housing without having to prepare for beam operations that require the extra discipline of radiation safety. This allows the safe testing of magnets and power supplies without meeting all of the requirements of the BAS that would be required to get to the `no access' state. (Does not exist in CID and LINAC.)
Reverse Bend
See RB.
Rexx
REstructured eXtended eXecutor (programming language).
RF
RadioFrequency.
RF
The microwave radio frequency power used to accelerate particles in the LINAC (2856 MHz) and in the ring cavities (714 MHz). Generally, any oscillation frequency above 30 KHz (above audio).
RFARD
Radio Frequency Accelerator Research Division. (SLAC)
RFARE
RF Accelerator Research and Engineering Division. (SLAC)
RFARED
RF Accelerator Research and Engineering Division.
RFC
Request for Comments. The document series, begun in 1969, which describes the Internet suite of protocols and related experiments. Not all RFCs describe Internet standards, but all Internet standards are written as RFCs.
RFP
Request For Proposal
RFQ
Radio-frequency quadrupole
RFQ
Request For Quotation
RFQD
Radio-Frequency Quadrupole Decelerator.
RG
Renormalization Group
RGA
Residual Gas Analyzer
RGB
Red, Green, and Blue.
RGD
Radiation Generating Devices.
RGE
renormalization group equation
RGT
Renormalization Group Transformation
RHEED
Reflection High-Energy Electron Diffraction.
RHEL4
Red Hat Enterprise Linux 4.
RHIC
Relativistic Heavy Ion Collider. A Brookhaven National Lab collider that generates 100 Gev/n per beam.
RHM
Running Hour Meter.
RHMC
Rational Hybrid Monte Carlo.
Rhumbatron
Cavity resonator invented by Hansen to serve as a powerful electron accelerator with relatively modest power consumption. As a partice accelerator, it was surpassed by the Kerst betatron, but it became a crucial part of Stanford's first microwave tube: Varian's klystron.
RHW
Restricted Hazardous Wastes.
RI/FS
Remedial Investigation/Feasability Study.
RIA
Rare Isotope Accelerator.
RIA
Relativistic Impulse Approximation
RICH
Ring-Imaging CHerenkov detector.
RID
Ratio of Intensity Driver.
RID
Review Item Discrepancy.
Rigidity Factor
A database constant used in the calculation of KMOD and equal to 33.356. BDES = KMOD X Rigidity X Length.
RIKEN
Institute of Physical and Chemical Research in Saitama, Japan. Active in many areas of physics, especially nuclear physics.
Ring Network
LAN in which multiple stations are each connected to an adjacent workstation. Communications must be relayed through the adjacent stations to reach the desired station.
Ring To LINAC
See RTL.
RIPL
The ripple readback from the SAM module.
RISC
Reduced Instruction Set Computer. See also RISC Architecture.
RISC Architecture
The objective of this computer technology is to reduce the complexity of instructions so each can be completed in a CPU clock cycle, producing faster results.
RISE
Raising Interest in Science and Engineering. (Stanford-DOE program )
Risk
The probability of an adverse health effect as a result of exposure to a hazardous substance or substances.
Risk Assessment
The use of available information to evaluate and estimate exposure to a substance(s) and its consequent adverse health effects.
Risk Management
The process of integrating risk-assessment results with engineering data and social, economic, and political concerns, then weighing alternatives to select the most appropriate public health action (ranging from public education to interdiction) that will lead to reduction or elimination of the identified risk.
RIST
Radioactive Ion Source Test
RIXS
Resonant Inelastic X-ray Scattering.
RJ-45 connector
Small plastic phone-jack style (but different size) connecter used (at SLAC) on 10base-T Ethernet connections.
RLA
Recirculating Linear Accelerator.
RLIM
Rate LIMit. A common effect of the MPS is to rate limit the beam.
RM
Records Management.
RM
Requirements Management.
RMA
Radiological Materials Area.
RMA
Return Merchandise Authorization.
RMCL
Recommended Maximum Contaminant Level.
RMDF
Radiation Materials Declaration Form
RMF
Response Matrix File.
RMF
Risk Management Framework.
RMMA
Radioactive Materials Management Area.
RMPP
Risk Management and Prevention Program. (CH&SC Sec. 25531 et seq)
RMS
Root Mean Square. The RMS value of the calculated-by-history buffer.
RNB
Radioactive Nuclear Beam
RND
Reducing Nuclear Danger.
RNL
Relativistic Nonlocality
RNO
Reduced normal-ordering
RO
Reverse Osmosis.
ROB
Research Office Building
ROC
Read-Out Chip.
ROCKSTAR
Robust Overdensity Calculation using K-Space Topologically Adaptiv e Refinement.
ROD
Repair Opportunity Day.
ROD
Record Of Decision.
ROD
The SSRL Research and Operations Division.
ROG
Reactive Organic Gases.
ROI
Regions Of Interest.
ROI
Return On Investment.
ROI
|Spatial region from which LAT photons are accumulated.|
  Glast Category: astronomy, SAS
Roller Screen
A type of beam monitoring screen that `rolls' in and out of the beam path.
Rollfix
A system for compensating for the rolls in the SLC arcs.
ROM
Read Only Memory.
ROMEOs
Retired Old Men Eating Out. (Informal SLAC social club).
ROOT
An object-oriented data-analysis framework developed at CERN.
ROR
Receiver Over Run.
ROSAT
ROentgen SATellite. An X-ray observatory developed through a coope rative program between Germany, the US and the UK. Launched June 1 1990 and turned off February 12, 1999.
Ross Diagram
A timing diagram showing the beam codes and their firing order for a specified machine rate. Named for Mark Ross, its originator.
Route
The path that network traffic takes from its source to its destination.
Router
A dedicated computer (or other device) that sends packets from one place to another, paying attention to the current state of the network.
RP
Radiation Physics. The SLAC organization group responsible for Radiation shielding design, Beam Line containment and BAS definitions.
RP
Responsible Party.
RPA
Random Phase Approximation
RPA
Rapid Prototype Array.
RPAR
See Special Review.
RPC
Remote Procedure Call. A type of interprocess communication that allows a process on one computer to call a process located in another computer.
RPC
Resistive Plate Chamber. (BaBar)
RPC modules
Resistive Plate Counter modules for detecting muons and long-lived kaons in the Belle detector (KEKB)
RPD
Radiation Protection Department. (SLAC)
RPFO
Radiation Protection Field Operations group. (SLAC)
RPG
Radiation Physics Group.
RPM
Risk Prioritization Model.
RPP
Respiratory Protection Program.
RPP
Review of Particle Physics. A biennial review published by The Particle Data Group which summarizes much of particle physics. Formerly titled Review of Particle Properties, RPP is available on the web at http://pdg.lbl.gov
RPP
Radiation Protection Program
RPTC
Rinecker Proton Therapy Center, located in Munich, Germany. Contains Europe's first clinical proton-therapy system.
RPWIA
Relativistic Plane Wave Impulse Approximation.
RQ
Reportable Quantity. (from 49 CFR) The quantity of a hazardous substance that triggers reports under CERCLA. If a substance is released in amounts exceeding its RQ, the release must be reported to the National Response Center, the State Emergency Response Commission, and community emergency coordinators for areas likely to be affected.
RQRPA
Renormalized Quasiparticle Random Phase Approximation
RR
Ramond-Ramond
RRA
Rolses, Responsibilities, and Authorities (ES&H).
RRAT
Rotating RAdio Transients.
RRCAT
Raja Ramanna Centre for Advanced Technology. (India)
RRD
Round Robin Database tool.
RRQM
Reconstruction of Relativistic Quantum Mechanics
RRR
Residual Resistance Ratio
RRT
Regional Response Team. Representatives of federal, local, and state agencies who may assist in coordination of activities at the request of the On-Scene Coordinator before and during a Superfund response action.
RS
|Type of error correction coding used in communications with GLAST. Telemetry packets received from the Observatory contain bits indicating whether there were corrected or uncorrected RS errors in the packets.|
  Glast Category: software, spacecraft
RS-232
The Electronics Industry Association standard defining interface voltage and current levels and other signal characteristics for connecting digital equipment to a transmission line.
RSB
Research Services Building (2013).
RSC
Raditaion Safety Committee.
RSC
Rigid Steel Conduit.
RSFP
Resonant Spin Flavor Precession
RSO
Radiation Safety Officer.
RSOS
Restricted Solid On Solid
RSOXS
Resonant Soft X-ray Scattering.
RSP
|Automated analyses run by the LAT collaboration for common use, e.g., catalog analysis, time-critical science processing, instrument monitoring, etc._|
  Glast Category: data processing, SAS
RSP
|A file format for response (.rsp) files. This class of files is used in XSPEC, gtrspgen, and other LAT-specific science analysis software packages. See Redesign and Reimplementation of XSPEC, Section 3.4.1 Data Package.|
  Glast Category: SAS, software
  URL: http://www.adass.org/adass/proceedings/adass00/P1-15/
RST
Russo-Susskind-Thorlacius
RSVP
Rare Symmetry Violating Processes. (Brookhaven)
RSWCF
Radiation Safety Work Control Form.
RTECS
Registry of the Toxic Effects of Chemical Substances. It is published by NIOSH.
RTEMS
Real-Time Executive for Multiprocessor Systems.
RTL
Ring To LINAC. A transport line section that brings the beam from either damping ring back to the LINAC.
RTM
Rear Transition Modules.
RTML
Ring To Main Linac. (ILC)
RTOS
Real-Time Operating System.
RUF
Respirator User's Form
Running Schedule
See Operations Schedule.
RVT
Restart Validation Team.(SLAC)
RVUE
Review of previous data.
RWK
ReWorK.
RWP
Radiological Work Permit.
RWQCB
Regional Water Quality Control Board.
RWT
Radiation Worker Training.
RWTP
Rinse Water Treatment Plant.
Rx
Tone Receiver. See Tone Loop.
RXTE
Rossi X-ray Timing Explorer satellite
R2As
Roles, Responsibilities and Authorities.
R2A2
Roles, Responsibilities, Authorities and Accountability (ES&H).

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

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