R
R Region.
R Roentgen.
R&D Research and Development.
R2A2 Roles, Responsibilities, Authorities and Accountability (ES&H).
R2As Roles, Responsibilities and Authorities.
RA Radiation Area.
RA Return Air.
RACT Reasonably Available Control Technology (from CAA).
RAD Radiation Absorbed Dose. A unit of absorbed dose of radiation. One RAD of absorbed dose is equal to .01 joules per kilogram.
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 potential 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.
RAFEL Regenerative Amplifier Free-Electron Laser
RAID Redundant Array of Independent/Inexpensive Disks.
RAIRS Reflection Absorption Infrared Spectroscopy
RAL Rutherford Appleton Laboratory (UK).
RAM Random Access Memory.
RAM RadioActive Material.
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 specifications.
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.
RCA Radiologically Controlled Area.
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)
RDBMS Relational DataBase Management System.
RDC Remote Desktop Connection.
RDDS Rounded Damped Detuned Structures. (NLC)
RDDS Rounded Damped-Detuned Structure
RDF Radical Distribution Function
RDP Remote Desktop Protocol.
RDR Reference Design Report (ILC).
RDTS Rausch De Traubenberg and Slupinsky
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.
REDE Resonance depolarization.
Reduced Instruction Set Computer See RISC.
REE Rare Earth Elements.
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.'
REM Readiness and Emergency Management Team (ES&H).
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).
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 DOE 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.
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 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).
RF RadioFrequency.
RFAR Radio Frequency Accelerator Research.
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.
RFI Request For Information.
RFP Request For Proposal
RFQ Request For Quotation
RFQ Radio-Frequency Quadrupole
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.
RHW Restricted Hazardous Wastes.
RI/FS Remedial Investigation/Feasibility Study.
RIA Rare Isotope Accelerator.
RIA Relativistic Impulse Approximation
RICH Ring-Imaging CHerenkov detector.
RID Review Item Discrepancy.
RID Ratio of Intensity Driver.
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.
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.
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.
RM Records Management.
RM Requirements Management.
RMA Return Merchandise Authorization.
RMA Radiological Materials Area.
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.
RNA RiboNucleic Acid
RNB Radioactive Nuclear Beam
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 Adaptive Refinement.
ROD Record Of Decision.
ROD Repair Opportunity Day.
ROD The SSRL Research and Operations Division.
ROG Reactive Organic Gases.
ROI Regions Of Interest.
ROI Return On Investment.
Roller Screen A type of beam monitoring screen that `rolls' in and out of the beam path.
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.
Ross Diagram A timing diagram showing the beam codes and their firing order for a specified machine rate. Named for Marc 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 Responsible Party.
RP Radiation Physics. The SLAC organization group responsible for Radiation shielding design, Beam Line containment and BAS definitions. Also called Radiation Protection.
RP&TC Research Partnerships & Technology Commercialization. (SLAC)
RPA Rapid Prototype Array.
RPA Random Phase Approximation
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.
RPD Radiation Protection Department. (SLAC)
RPFO Radiation Protection Field Operations group. (SLAC)
RPG Radiation Physics Group.
RPM Risk Prioritization Model.
RPO Recovery Point Objective (Business Continuity Plan).
RPP Respiratory Protection Program.
RPP Radiation 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
RPTC Rinecker Proton Therapy Center, located in Munich, Germany. Contains Europe's first clinical proton-therapy system.
RPTC Research Partnerships and Technology Commercialization. (SLAC)
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 Roles, 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-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/Support Building (Bld. 052).
RSC Radiation 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.
RST Russo-Susskind-Thorlacius
RSVP Rare Symmetry Violating Processes. (Brookhaven)
RSWCF Radiation Safety Work Control Form.
RSXS Resonant Soft X-ray Scattering (a type of chamber / end station in LCLS and a type of science done at LCLS)
RTECS Registry of the Toxic Effects of Chemical Substances. It is published by NIOSH.
RTEMS Real-Time Executive for Multiprocessor Systems.
RTM Rear Transition Modules.
RTML Ring To Main Linac. (ILC)
RTO Recovery Time Objective (Business Continuity Plan).
RTOS Real-Time Operating System.
RTP Rapid-Thermal-Processing.
Rubin Vera C. Rubin Observatory, in Chile, location of LSST experiment
RUF Respirator User's Form
Running Schedule See Operations Schedule.
RVT Restart Validation Team.(SLAC)
RVUE Review of previous data.
RWG Revolutionary Working Group. (SLAC Contract Project)
RWK ReWorK.
RWM Radiation Waste Management group (SLAC)
RWP Radiological Work Permit.
RWQCB Regional Water Quality Control Board.
RWT Radiation Worker Training.
RWTP Rinse Water Treatment Plant.
RXTE Rossi X-ray Timing Explorer satellite
