Legacy SLACspeak D
DAC Director's Advisory Committee.
DAC versus Current Goodness See DVIG.
DACL CAMAC DAC location. A magnet database secondary.
DACV A magnet database secondary indicating the last DAC value.
Daczero To run down a magnet to zero current. This is done by putting zero volts on the DAC that controls the magnet's power supply.
DAFNE phi-meson factory at the Frascati National Laboratories (Italy)
DALEC Dump All Low Extracted Currents. A system which senses current in the Damping Ring before extraction and stops extracted beam in the Beam Switch Yard if current is below a specified threshold.
Damping Ring Injection Point See DRIP.
Damping Ring Phase Processor See DROPP.
Damping Ring RF See DRRF.
Damping Ring Turns Counter See DRTC.
DAPHNE see DAFNE.
DAS Data Acquisition System (SLD)
DASP DESY double-arm spectrometer.
DAT An abbreviation for DATA used in VAX file terminology as in 'File.Dat.'
DBC Deuterium bubble chamber.
DBEX DataBase EXecutive. A VAX process which transfers data between the micros and the host computer.
DBGEN DataBase GENeration. The process of rebuilding the database on the SLC VAX. It is a process that adds new signals to the database and simultaneously checks that no two signals have the same name.
DBInstall Transfer of the complete database from the SLC VAX to the MCC VAX (or vice versa). It involves a brief shut down of operations. (The computer can't use the database while it is being updated.)
DCH Drift CHamber. (BaBar)
DCI Dispositif de Collision dans l'Igloo. The electron - positron storage ring at ORSAY.
DCL Digital Command Language. The command language used by the VAX.
DCVD Drift Chamber Vertex Detector. It is used for high-precision tracking of charged particles near the interaction point.
DDS Damped Detuned Structure
DEAR Experiment conducted at the Frascati National Laboratories (Italy) phi-meson factory DAFNE
Decnet A VAX communications system protocol between DEC computers. Decnet provides remote file service and remote terminal sessions. It can be used on the Ethernet cable system.
DELCO Direct ELectron COunter, an experiment at PEP.
DELPHI DEtector with Lepton Photon and Hadron Identification. (CERN-LEP)
DESY HERA DESY Hadron Electron Ring Accelerator
DGRP Display GRouP. A VAX primary.
DIDN Digital Input Device label defiNitions. A VAX primary.
Differential Pumping Station See DPS.
Digital Command Language See DCL.
Digital InputDevice Label Definitions See DIDN.
Digital to Analog Converter See DAC.
DIRC Detector of Internally Reflected Cherenkov light. DIRC is a device developed for use in the SLAC BaBar Detector. Also: Detection of Internally Reflected Cerenkov Light. Invented by Blair Ratcliff.
Disaster Monitor Obsolete. See Burn Through Monitor.
Display Group See DGRP.
Divide By Four A module which divides by four the S-BAND frequency to get the RF subharmonic used in the damping rings.
DLCO DELCO detector at SLAC-SPEAR or SLAC-PEP.
DLPH DELPHI detector at LEP.
DM Disaster Monitor. See Burn Through Monitor.
DM1 Magnetic detector no. 1 at Orsay DCI collider.
DM2 Magnetic detector no. 2 at Orsay DCI collider.
DOE ACTS Department of Energy Academies Creating Teacher Scientists.
DOE ER Department of Energy, Energy Research. This department supersedes the Energy Research and Development Agency (ERDA), which superseded the Atomic Energy Commission (AEC).
DOE OBER Department of Energy Office of Biological and Environmental Research.
DOE SF DOE San Francisco Field Office.
DOE/OAK Department of Energy Oakland Operations Office
DOENTS Department of Energy Nationwide Telecommunication Services.
DONUT Direct Observation of the NU Tau. Experiment (FermiLab) that in 2000 directly observed the tau neutrino for the first time.
DORIS DOppel RIng Speicher, a storage ring at DESY.
DPAC Deputy Physics Analysis Coordinator (BaBar).
DPG Deutsche Physikalische Gesellschaft.
DPS Differential Pumping Station. A refrigerated section of waveguide which is used to maintain a difference in vacuum pressure between the LINAC and BSY, yet allows beam to pass (also called Refrigerated Baffle).
Drift Chamber Vertex Detector See DCVD.
DRIP
Damping Ring Injection Point. 1. A PPS area between PPS Sector 0 and PPS Sector 2, and the Damping Ring vaults. 2. The point where the beamlines from and to the rings are connected (the Ten Finger Box).
DROPP See DRPP
Dropp Phase A Damping ring phase shifter used in phase ramping the damping ring RF to phase the beam with respect to the LINAC S-BAND frequency.
DRPP Damping Ring Phase Processor. A CAMAC module driving the Damping Ring Phase Shifter. (Sometimes appears as DROPP.)
DRRF Damping Ring RF. A VAX primary.
DRS DResS.
DRTC Damping Ring Turns Counter. A CAMAC module including a 20 bit counter reset by the FIDO missing pulse and incremented by the MTG: used to synchronize extraction from the damping rings with respect to PEP RF when filling the PEP storage ring.
DRV Damping Ring Vault. (SLC)
DSP Digital Signal Processors
DTE Data Terminal Equipment.
DUD Deep Underground Detector (IMB).
DUMAND Deep Underwater Muon And Neutrino Detector.
DUSEL Deep Underground Science and Engineering Laboratory (at Homestake Mine, South Dakota). Became SURF.
Dvi A common abbreviation for DeVice Independent. It refers to output produced by TeX, and is often used as the "extension" portion of a computer file specification containing TeX output, as in "myletter.dvi."
DVI The product of the DAC and power supply transfer functions. For conversion of DAC units to power supply output units. A SLC VAX database secondary.
DVIG DAC Versus current Goodness. The root mean square residual error (in DAC bits) from the linear fit as determined from a calibration. A magnet database secondary. Also, a SLC VAX database secondary.
Dvips A commonly-used program that converts TeX DVI files to PostScript. An important feature is that it can merge other PostScript files into its output, permitting an author to include figures and other graphics with text.
