P
P Private (computer drive designation).
P Wastes A federal waste list comprised of substances categorized as acutely hazardous.
P&T Parking and Transportation or Packaging and Transportation.
P(S) synchrotron light monitor.
P2/E2 Plan Pollution Prevention and Energy Efficiency Plan.
P5 Particle Physics Project Prioritization Panel.
PA Preliminary Assessment.
Pa Pascal. A unit of pressure.
PA Project & Activity code. (SLAC)
PAAA Price-Anderson Amendments Act.
PAB Physics & Astrophysics Building (Stanford).
PAC Perturbed Angular Correlation
PAC Particle Accelerator Conference.
PAC Physics / Project Advisory Committee.
PAC Phase and Amplitude Controller.
Packet The unit of data sent across a packet switching network. The term is used loosely defined. While some Internet literature uses it to refer specifically to data sent across a physical network, other literature views the Internet as a packet switching network and describes IP datagrams as packets.
Packet Internet Groper See PING.
PACM Potential Asbestos Containing Material.
PACT Projects for the Acceleration and Commercialization (DOE)
PAEC Pakistan's Atomic Energy Commission.
PAESMEM Presidential Award for Excellence in Science, Mathematics and Engineering Mentoring.
PAFD Palo Alto Fire Department.
PAH Polycyclic Aromatic Hydrocarbons.
Pair Production The creation of an electron and a positron from a high energy photon in a strong electric field such as that surrounding a nucleus. This process is used to create positrons at the positron target.
PAL Pohang Accelerator Laboratory.(Korea)
Paleoparadoxia See Neoparadoxia Repenningi entry
PAMELA Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics.
PAMM Planned Accessible Machine Maintenance or Planned Access for Maintenance and Modifications. (LCLS)
PANDA Proton ANtiproton annihilation DArmstadt.
PANIC Particles And Nuclei International Conference.
Panic Circuit Part of the linac PPS system that consists of EMERGENCY OFF buttons that will trip off all the VVSs in the LINAC when depressed.
Panofsky Long Ion Chamber See PLIC.
PAO Proposal Advancement Office.
PAP Performance Assurance Plan (GLAST).
PAP Personnel Access Platform (GLAST).
PAPR Powered Air-Purifying Respirator.
PARC Xerox Corporation's Palo Alto Research Center
PARMELA Phase And Radial Motion in Electron LinAcs. An accelerator simulation program for electron linacs. (CERN) See also PARMILA.
PARMELLA Phase And Radial Motion in ELectron Linear Accelerators. A modeling and design program for transport line optics that incorporates beam bunching.
PARMILA Phase And Radial Motion In LinAcs. An accelerator simulation program for linacs. (CERN) See also PARMELA.
PARS Project Assessment and Reporting System. (DOE)
PARS-II Project assessment and Reporting System.
PASAG Particle Astrophysics Scientific Assessment Group.
PASCOS PArticles, Strings and COSmology (Symposium).
PASHA Package for Automated Snoop Hardware Analysis.
Pattern Receiver Interrupt Multiplexer See PRIM.
PAW Physics Analysis Workstation. A computer program available from CERN, PAW is an interactive utility for visualizing experimental data in a computer graphical display.
PAWS Parallel Assessment Window System.
PAX Polarized Antiproton eXperiment.
PB Performance Baseline
PB Pep Beamline. (SSRL)
PBGS Partial Breaking of Global Supersymmetry
PBH Primordial Black Holes
PBRT Proton Beam Radio-Therapy.
PBWA Plasma Beat Wave (laser) Acceleration
PBX Private Branch eXchange. A private telephone network used within an enterprise. PBX users share a certain number of outside lines for making telephone calls external to the private network.
pc Parsec. An astronomical unit of measurement equivalent to 3.26 light years' distance, calculated using the PARallax of 1 arc SECond .
PC Personal Computer.
PC Protection Collimator.
PCAC Partially Conserved Axial vector Current
PCAST President's Council of Advisers on Science and Technology.
PCB PolyChlorinated Biphenyl. A group of toxic, persistent chemicals used in transformers and capacitors for insulating purposes and in gas pipeline systems as a lubricant. Further sale or new use was banned by law in 1979.
PCB Printed Circuit Board.
PCD Power Conversion Department. Engineers, maintains and installs cables for modulators, sub-boosters and all power supplies from the injector through the Research Area.
PCDS Photon Controls and Data Systems.
PCE PerChloroEthylene. (aka tetrachloroethylene, or `perc'.)
PCI Peripheral Component Interconnect
PCI Phase Contrast Imaging.
PCM Programmable Control Module.
PCMCIA Personal Computer Memory Card International Association. This group of manufacturers created the new PCMCIA industry standard adapter. It looks like a credit card and is mounted by pushing it into an external computer slot, similar to an ATM.
PCMS Project Controls Management System. (FGST)
PCON Phase CONfiguration. The phase of a klystron taken from a model or a saved configuration.
PCR Polymerase Chain Reaction.
PCR Project Closure Review
PCT Parity Charge conjugation and Time reversal.
PCW Process Cooling Water.
PD Project Director.
PDB Protein Data Bank.
PDE Partial Differential Equations.
PDES Phase DESired for a klystron.
PDF Parton Distribution Function or Pair-Distribution Function.
PDF Portable Document Format.
PDF Powder Diffraction File.
PDG Particle Data Group. The PDG is an international collaboration with affiliations at LBNL, CERN, KEK, INFN, IHEP, SLAC and elsewhere. The PDG reviews the field of particle physics and compiles and analyzes data on particle properties.
PDM Project or Product Data Management.
PDR Preliminary Design Review.
PDS Pole Divergent Subtraction
PDS Power Density Spectrum.
PE Plant Engineering. A SLAC organizational group merged under Facilities and renamed the Site Engineering and Maintenance Office (SEM).
PE/BI Plans Examiner/Building Inspector.
PEA Personnel Exclusion Area.
PEC PhotoElectroChemical.
PED Project Engineering and Design.
PED Plant Engineering Department.
PEEM PhotoElEctron Microscopy.
PEG Polarized Electron Gun. A CID injector gun used to generate a polarized electron beam.
PEL Permissible Exposure Limit. Maximum exposure levels for workplace chemicals as determined by OSHA.
PEL Physical ELectronics. Renamed Surface and Materials Science in 2005.
PEMP Performance Evaluation and Measurement Plan. (DOE)
Pencil Beam A beam with low energy spread and low emittance: usually tightly collimated by one or more adjustable collimators.
Penetration The flow of a hazardous chemical through zippers, stitched seams, pinholes, or other imperfections in protective clothing material.
penguin A type of Feynman diagram describing the weak decay of a quark through an intermediate quark - weak boson loop, in which a gluon (or Z or photon) couples to the quarks in the loop, and then decays to a quark - anti-quark pair.
PENULT PENULTimate.
PEO Plant Engineering Operations. (SLAC)
PEP Project Execution Plan.
PEP-N Upgrade to PEP-II (proposed).
PEP-X Synchrotron storage ring project at SLAC utilizing PEP-II. (Proposed)
PER PERsonnel Department.
PERDPM PERioDic Permanent Magnet.
Periodic Permanent Magnet Klystron An advanced generation klystron developed at SLAC, and planned to provide microwave power for the NLC.
Perl Practical Extraction and Report Language. An interpretive programming language developed by Larry Wall. Because of its strong text-processing abilities, Perl has become one of the most popular languages for writing CGI scripts.
Permeation An invisible process by which a hazardous chemical moves through a protective clothing material.
Permissible Exposure Limit See PEL.
Permissive A pattern gate used to allow the gun to pulse when a set of interlocks is complete. The BCS and some MPS systems remove the permissive in response to interlock trips. Operators also have control of the permissive. This is a `fail-safe' method of killing the beam, in that the gun can only pulse when the permissive gate is present.
Permit An authorization, license, or equivalent control document issued by EPA or an approved state agency to implement the requirements of an environmental regulation, e.g., a permit to operate a wastewater treatment plant or to operate a facility that may generate harmful emissions.
Persistence The property of a chemical whereby it tends to remain in the environment in its original molecular form.
Personnel Protection System See PPS.
PERT Program/project Evaluation and Review Technique.
PERT Procurement Evaluation Review Team
PET Positron Emission Tomography.
PETE Photon-Enhanced Thermionic Emission.
PETRA See DESY PETRA
PETS Power Extraction and Transfer Structure. (CLIC)
PEVATRON Accelerator of cosmic rays with energies of several PeV.
PF Photon Factory
PF Protection Factor. That number which when multiplied by the TLV of a substance yields the maximum permissible concentration in which the respirator in question may be used. Protection factors are assigned to classes of respirators.
PFA Particle Flow Algorithms.
PFIAB President's Foreign Intelligence Advisory Board.
PFMON ProFile MONitor.
PFN Pulse Forming Network.
PG&E Pacific Gas and Electric Company
PGB Pseudo-Goldstone Boson
PGM Plane Grating Monochromator.
P-Gun or PGUN Polarized gun. See also PLS.
pH A measure of corrosivity on a scale from O to 14, with 7 being neutral, acidity increasing toward O and alkalinity increasing toward 14.
Phase Acceptance See Acceptance.
Phase Advance The phase change of a betatron oscillation over a certain distance(s) which can be a lattice cell.
Phase and Amplitude Detector See PAD.
Phase and Amplitude Detector Offset See PADO.
Phase and Radial Motion in ELectron Linear Accelerators See PARMELLA.
Phase Configuration See PCON.
Phase Raw See PRAW.
Phase Shift Keying See PSK.
Phase Space A plot of the beam position versus its phase angle.
Phasing To adjust the timing of any periodic device less than 360 degrees.
Phasing To change the timing of a klystron's RF output with respect to the bunch. This will add or subtract energy from the bunch by causing the bunch to see a greater or smaller accelerating voltage.
PHENIX the Pioneering High Energy Nuclear Interaction eXperiment located at BNL to investigate high energy collisions between heavy ions and protons.
PHENIX A comprehensive software package for macromolecular structure determination using crystallographic or electron cryo-microscopy data IB-1770
Phishing The practice of sending false email in an effort to trick the receiver into revealing information that can be used to perpetrate identity theft. Phishers direct the unwary to sites that look legitimate, but are not.
PHM Klystron summary display indicating that the station mean phase is out of tolerance.
PHM PHase Mean.
PHMC Polynomial Hybrid Monte Carlo
PHOBOS A detector at RHIC.
phonon wave-like vibration of an atom in a solid.
Photomultiplier A photon to current transducer amplifier which uses the photoelectric effect and secondary emissions in cascaded diode cells to produce a measurable electric current from a relatively weak light source.
Photon A particle of light. In 1889, Max Planck postulated that light is not continuous, but comes in bunches, or quanta. Each of these granular quanta of light is made up of photon particles.
photonics The technology of using particles of light as carriers of information.
PHP Personal Home Page (original meaning). General purpose scripting language developed by Rasmus Lerdorf.
PHTN Photon.
Physical Address A grouping of numbers that identifies a particular piece of computer hardware connected to a local area network or other data communications system. Contrast with logical address.
Physical ELectronics See PEL.
PHYSTAT International Conference on Statistical Problems in Particle Physics, Astrophysics and Cosmology.
PIC Particle-In-Cell
PIC Port d'Informació Científica. (Scientific Information Harbour)
PIC Product of Incomplete Combustion.
PIC Person In Charge. The person in charge of laboratory response to emergencies.
PIC Pocket Ion Chamber.
PIC Protection Ion Chamber.
Picobarn A unit of area equal to 10 to the minus 12 barns. Used to measure cross-sections in nuclear and particle physics.
Picocurie Measurement of radioactivity. A picocurie is one million millionth, or a trillionth, of a curie, and represents about 2.2 radioactive particle disintegrations per minute.
Picocuries Per Liter A unit of measure used for expressing levels of radon gas. See also Picocurie.
PICSEL Physics with Integrated Cmos Sensors and ELectron machines.
Picture Element See Pixel.
PID Photo-Ionization Detector.
PID Particle IDentification.
PIE Precourt Institute for Energy. (Stanford)
PIE Process Improvement and Efficiency.
PIER Promoting Inclusive and Equitable Research (DOE)
Pig A container, usually lead, used to ship or store radioactive materials.
PII Personally Identifiable Information.
PILATUS PIxel ApparaTUs for the Sls project.
Pile The fuel element in a nuclear reactor.
PIM Profile Intensity Monitor.
PIMC Path Integral Monte Carlo
PIMMS Proton and Ion Medical Machine Study.
PING Packet INternet Groper. A program which is useful for testing and debugging networks. It sends an ICMP Echo packet to the specified host, and waits for a response. It reports successor failure and statistics about its operation. The term is used as a verb: Ping host X to see if it is up!
PingER Ping End-to-end Reporting.
PIP Project Implementation Plan. (ILC)
Piracy Unauthorized copying of software.
PIS Primary Instrument Scientist.
PISL Pi-mode stabilizing loops
PITZ PhotoInjector Test Facility, Zeuthen. (DESY)
PIV Personal Identification Verification.
Pixel Picture element. A dot of video graphics that can be in either an on or off state. The number of pixels determines the resolution. Resolution is the number of pixels on the monitor and is determined by multiplying the number of horizontal pixels by the number of vertical pixels. For example, VGA is 640 x 480 or 307,200 pixels on the monitor.
PJB Pre-Job Briefing
PJLZ Parrinello-Jona-Lasinio-Zwanziger.
PKU3 Peking University 3rd. A 1.3 gigahertz TESLA-type nine-cell niobium superconducting cavity.
PL Pulsed Linac (FEL).
PL/1 Programming Language 1. General-purpose language used for both scientific and business applications.
Plant Engineering See PE.
PLAS Plastic detector.
PLC Programmable Logic Controller.
PLD Pulsed Laser Deposition.
PLEDGE PoLicy Enforcement in Data Grid Environments. (NARA)
PLI Project Leadership Institute. (DOE)
PLIC Panofsky Long Ion Chamber. A gas filled cable running along the linac housing or primary beam transport line used to detect a mis-steered beam. The point where the beam is lost can be determined from the time of arrival of the ion shower that the lost beam sprays into the cable-chamber. Conceived by Wolfgang K. H. Panofsky, SLAC Director Emeritus.
PLS Pohang Light Source. (Korea)
Plug Compatibility Manufactured hardware that is designed to be interchangeable with another vendor's product, even though internal details may differ.
PLUME Pixelated Ladder with Ultra-Low Material Embedding. (ILC)
PLUT DESY PLUTO detector.
PM Peripheral Monitors.
PM Project Management.
PM Preventive Maintenance.
PM Pulsed Magnet.
PM Performance Measures.
PM Protection colliMator.
PM Pulse-bending Magnet.
PMAG Project Management Assurance Group.
PMAAG Project Management Advisory and Assurance Group
PMB Performance Measurement Baseline.
PMC PCI Mezzanine Card. (GLAST)
PMCS Project Management Control System
PMD Photon Multiplicity Detector.
PME Plant Maintenance Electrical.
PMI Plant Maintenance Instrumentation.
PMM Plant Maintenance Mechanics.
PMN Pre-Manufacture Notification.
PMO Project Management Office. (SLAC)
PMPS Photon Machine Protection System
PMS Program Management System.
PMS Peripheral Monitoring Stations.
PMS Plant Maintenance Services.
PMT PhotoMultiplier Tube. See also Photomultiplier.
PMU Plant Maintenance and Utilities Building.
PMV Pulse-bending Magnet Vertical.
PNC Parity NonConservation, or Parity NonConserving.
PNGB Pseudo-Nambu-Goldstone Boson.
PNL An abbreviation for `Panel.'
PNNL Pacific Northwest National Laboratory.
PNT Position, Navigation and Time.
PO Purchase Order.
PO Pump Out.
POAM Plan Of Action and Milestones.
POC Point Of Contact or Point of Connection.
Pockels Cell A crystal which changes its angle of light polarization when submitted to a high voltage. A Pockels cell is used in the PLS to chop the laser beam and also for polarization and intensity control. It is useful for fast switching and control of polarized light beams.
POD Print-On-Demand.
POHC Principal Organic Hazardous Constituent.
POI Person Of Interest.
Poisson A modeling program used for calculating magnetic fields.
Poisson A type of statistical distribution (see also Gaussian) named after the mathematician Simeon Denis Poisson.
Polling Connecting to another system to check for things like mail or news.
Polychlorinated Biphenyl See PCB.
POMDP Partially Observable Markov Decision Process.
Pomeron A color-neutral collective partonic excitation the aggregate mechanism responsible for elastic scattering.
POMM Planned Operational Machine Maintenance. (LCLS)
POP Post Office Protocol. A protocol used to retrieve e-mail from a mail server. Most e-mail applications (sometimes called an e-mail client) use the POP protocol, although some can use the newer IMAP (Internet Message Access Protocol).
POPBCI POst Processor for Beam Coupling Interfaces.
PosiPol Polarized positrons.
Positron A particle with a mass equal to an electron but with opposite charge. First postulated by P.A.M. Dirac in 1929, and experimentally discovered by C.D. Anderson in 1931.
POSS Palomar Observatory Sky Survey (1950-1955).
Post Telephone and Telegraph Administration See PTT.
Postmaster The person responsible for taking care of mail problems, answering queries about users, and other related work at a site.
PostScript A commonly-used graphics description language designed for use with computer printers. Most modern computer word processors and graphics programs can produce PostScript output.
POTW Publicly-Owned Treatment Works.
POTW Plan Of The Week.
POW Plan Of the Week. (SLAC)
Power Conversion Department See PCD.
Power Supply Controller See PSC.
Power Supply Operations Group See AME.
Power Teks. See AME.
PPA Particle Physics and Astrophysics (Directorate-SLAC). Changed in August 2007. Was Particle and Particle Astrophysics (Directorate-SLAC).
PPARC Particle Physics and Astronomy Research Council (UK).
ppb Parts per billion.
PPB Planning and Policy Board. (Stanford University)
PPC Parallel Plate Chamber
PPDG Particle Physics Data Grid. Collaboration formed in 1999 to develop a worldwide distributed computing model.
PPE Personal Protective Equipment.
PPL Pervasive Parallelism Laboratory. (Stanford - Computing)
PPL Pole PLate.
PPM Piecewise Parabolic Method.
PPM Periodic Permanent Magnet.
ppm Parts per million.
PPM Focusing Periodic permanent magnet focusing. Uses an array of closely spaced magnetic lenses of alternating polarity, driven by ring- shaped, high-energy, rare earth magnets (which provides table fields and require no input current).
PPN Parametrized PostNewtonian
PPO Program Planning Office, an ES&H Division Department
PPP Point to Point Protocol. A protocol that allows a computer to use the TCP/IP protocols and become a full Internet member with a standard phone line and a hi-speed modem. Replaces SLIP.
PPP Preferred Procurement Products. (DOE)
PPPA Poison Prevention Packaging Act. (Federal)
PPPL Princeton Plasma Physics Laboratory.
PPRC Polarized Photocathode Research Collaboration.
PPS Pulses Per Second.
PPS Personnel Protection System. A safety system designed to protect people from radiation hazards. It includes the access control system of radiation areas and the radiation detection systems (BSOIC and BCS).
PPSN Public Packet Switched Network, e.g., Telnet, Tymnet, Uninet in the U.S., Datapac in Canada, Datexp in Germany.
PQCD Perturbative QCD
PQFT Perturbative Quantum Field Theory.
PR beam position monitor, cherenkov cell, phosphor screen.
PRA Paperwork Reduction Act. (1995)
PRBs Permeable Reactive Barriers.
PRC People's Republic of China.
PRC PRoperty Control.
PRCS Permit Required Confined Spaces.
PRD Physics Requirements Document.
PRD Pressure Relief Damper.
PREC Physical Requirements and Exposures Checklist.
Pre-kicker A small pulsed magnet used on SLC to cancel the kick received by the second bunch on the previous turn of the NDR.
Preprint A manuscript intended for publication but circulated among peers for comment prior to being submitted for publication.
Preset Buttons PPS search devices which need to be activated by an operator when searching an accelerator area. These buttons are placed strategically in the beam housing to ensure that the search team does a complete job of searching all the nooks and crannies in the tunnel.
Primary Waste Treatment The first steps in wastewater treatment. Screens and sedimentation tanks are used to remove most materials that float or will settle. Primary treatment results in the removal of about30 percent of carbonaceous biochemical oxygen demand from domestic sewage.
PRIME Post-RefInement and MErging. Software program for analyzing data from X-ray laser experiments.
Princeton-Stanford Storage Rings See Stanford-Princeton Storage Rings.
Print Server A network server assigned to manage local or remote printers and printer queues. The print server keeps track of print jobs, allows manipulation of print queues, and sends print jobs to various printers.
Priority Pollutants A list of chemicals selected from the list of toxic pollutants by the EPA as priority toxic pollutants for regulation under the Clean Water Act.
PRISM Phase-Rotated Intense Slow Muon Source (Osaka).
Private Branch Extension See PBX.
PRL Physics Review Letters. PHYSICS
PRL Phase Reference Line (For PAD).
PRL Positron Return Line.
Probability A number between zero and one that represents the chance of occurrence of a given event, wherein a probability of zero means there is no chance of the event occurring, and a probability of one means the event must happen. (A fifty percent chance of occurrence is a probability of one half).
Process Any autonomous program executed by a computer's CPU is a process. Sometimes called a job.
Profile Monitor A screen inserted in a beam transport line to view the beam cross section. The visible emission created by the beam exiting the screen's phosphor coating (usually zinc sulfide) is viewed by a video camera and the picture transmitted to the Control Room. Profile monitor screens can usually be inserted and removed remotely by the machine operators.
Program Deputy The physicist temporarily in charge of the current program. Program deputies usually have the 'duty' for a period of one or two weeks.
Programmable Input/Output Processor See PIOP.
Programmable Synchronization Unit See PSU.
Programmable Width Unit See PWU.
Programmed Data Processor See PDP-11.
Programming Language 1 See PL/1.
Prop. 65 Safe Drinking Water and Toxic Enforcement Act of 1986, citizen's referendum in California.
PROSCAN Proton therapy project at the Paul Scherrer Institute (PSI).
Protection Factor See PF.
Protection System See PTS.
Protocol A formal description of message formats and the rules two computers must follow to exchange those messages. A Protocol can describe low-level details of machine-to-machine interfaces(e.g., the order in which bits and bytes are sent across a wire) or high-level exchanges between allocation programs (e.g., the way in which two programs transfer a file across the Internet).
Proxy The mechanism whereby one system fronts for another system in responding to protocol requests. Proxy systems are used in network management to avoid having to implement full protocol stacks in simple devices, such as modems.
PRP Potentially Responsible Party.
PRP Proposal or Program Review Panel.
PRST-AB Physical Review Special Topics - Accelerators and Beams.
PRT Participating Research Team (SSRL)
PRV Pressure Relief Valve
PS Pico-Second.
ps A commonly used abbreviation for PostScript. Often used as the extension portion of a computer file specification containing PostScript language commands, as in myletter.ps.
PS Program Support. (DOE)
PS Power Supply.
PS vacuum Pumping (above housing)
PS Pressure Switch.
PS2 high-energy Photon Science.
PSA PCB waste Storage Area. SLAC
PSAD Preliminary Safety Analysis Document.
PSB Power Supply Board.
PSC Planar Spark Counter.
PSD Prevention of Significant Deterioration. (from CAA)
PSD Pulse Shape Discrimination.
PSE Power Systems Engineering group (SLAC).
PSES Pretreatment Standards for Existing Sources. (from CWA)
PSF Point Spread Function.
PSF Planetary Systems and Star Formation.
Psi The Greek letter 'y.' See also Phase Advance.
PSI Paul Scherrer Institute.(Switzerland)
PSI A revolutionary long-lived meson discovered simultaneously at SLAC and MIT in 1974. Burton Richter (SLAC) and Sam Ting (MIT) shared the 1976 Nobel Prize in Physics for the discovery of this particle, called J by the MIT team.
PSI Pounds per Square Inch (unit of pressure).
PSI Protein Structure Initiative (NIH/NIGMS).
PS-II PhotoSystem-II
PSK Phase Shift Keying. Used in the SLED system to add the energy stored in the sled cavity to that being produced by the klystron. The PSK knob moves the envelope of the RF for sector 2-30with respect to the beam. It affects both beams, unlike the phase ramp knob which is used to adjust the e+ and e- beam energies separately.
PSLB Photon Science Laboratory Building. (Bldg. 057) Renamed Arillaga Science Center in 2017.
PSM vacuum Pumping (Mech.) (above housing)
PSN Proper Shipping Name. (from 49 CFR)
PSNM Power Supply NaMe or serial number.
PSNS Pretreatment Standards for New Sources. (from CWA)
PSPS Public Safety Power Shutoff (PG&E)
PSUSY ParaSUperSYmmetry.
pT Transverse momentum.
PTA Projects-Tasks-Awards. (Stanford)
PTE Potential To Emit.
PTEC Physics Teacher Education Coalition.
PTFE PolyTetraFluorEthylene.
PTPS Pulse To Pulse Stabilizer.
PTS ProTection System. The SLAC operational group charged with designing and troubleshooting electronics systems used in Beam Containment and PPS.
Public Packet Switched Network See PPSN.
PUE Power Usage Effectiveness.
PULSE Photon Ultrafast Laser Science and Engineering center (SLAC).
Pulsed Amplitude Unit See PAU.
Pulsed Bend Horizontal See PBH.
Pulsed Power Output Module See PPOM.
Pump down Depressurize.
Pump Probe A technique developed for the observation of ultra-fast events. A sample of material is 'pumped' at regular intervals to create discrete events, and as the sample is changing, the experimenters 'probe' the response of the system to the created excitation events.
PUR Purchasing.
PVA PolyVinyl Alcohol.
PVA
Process Variable Access (Computing)
PVC PolyVinylChloride.
PVM Parallel Virtual Machine. A message-passing library and processor daemon for coordinating tasks across processors. Public domain from Oak Ridge National Lab. Like Express and Linda, usage has been growing explosively. Used in conjunction with batch programs like Condor on MPPs or clusters to take better advantage of multiple processors. PVM node programs aren't currently under Condor control.
PVSS Prozessvisualisierungs und Steuerungs System, an LHC control software.
PWA Partial-Wave Analysis.
PWC Proportional Wire Chamber
PWFA Plasma-based WakeField Acceleration.
PWHA Pre-Work Hazard Assessment.
PWR Pressurized Water Reactor.
PWSA Ports and Waterways Safety Act. (Federal)
PWT Plane Wave Transformer.
PXE Preboot eXecution Environment
Pyroehoric Capable of igniting spontaneously when exposed to dry or moist air at or below 130 degrees F (54.44 C).
Pyrolysis The destruction of molecular composition through heating, resulting in smaller, simpler, and generally less toxic compounds.
