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Gas Mixing Shack (GMS)

The building next to the utility pad and the ring in which the DCH and IFR gases are prepared.


General Monitoring Board (GMB)

The common electronics interface board where detector monitoring/control signals are converted to/from signals on CANbus. This is the BaBar hardware interface to EPICs.

Reference Link (http://www.slac.stanford.edu/~wtmeyer/detcon/gmb/gmb.html)


Generator Framework Interface (GenFwkIn)

The Generator Framework Interface, (GenFwkIn), is used to generate events in the Babar Framework using various underlying generators.

Reference Link (http://www.slac.stanford.edu/BFROOT/www/doc/workbook/gen/gen.html)


GeoKin (GeoKin)

BaBar software package for vertex fitting with geometric and kinematical constraints

Reference Link (http://www.slac.stanford.edu/babar-internal/BAD/doc/detail.html?docNum=102)


GHit

primitive hit information such as a particle's location and energy at a detector boundary, generated by a tracking and physics simulation module such as BgsApp, persisted in the database, and transmitted to a detector simulation module such as SimApp.


Giga electron volts (GeV)

The work required to move a charge of one electron through a potential difference of one billion volts.


Global Level Trigger (GLT)

The GLT attempts to match the angular locations of calorimeter towers and drift chamber tracks, and flexibly generates Level 1 triggers and sends them on to the Fast Control and Timing system (FCTS), based on the results of the processing.

Reference Link (http://www.slac.stanford.edu/BFROOT/www/Detector/Trigger/trigger_whatsit.html)


gmake

A GNU make tool. Make is a tool which controls the generation of executables and other non-source files of a program from the program's source files.

Reference Link (http://www.gnu.ai.mit.edu/software/make/make.html)


Good tracks

In Beta, a general class of track selectors. This term is normally qualified with the level of selection, e.g., GoodTtracksVeryLoose and in this context refers to a list of tracks in a BaBar event.


Good Tracks Loose (GTL)

Charged tracks having a minimum transverse momentum of 0.1 GeV, at least 12 hits in the drift chamber, and which pass within 10 cm of the beamspot in z and 1.5 cm from the beamspot in x-y.

Reference Link (http://www.slac.stanford.edu/BFROOT/www/doc/workbook/nanomicro/v8.8/Micro/CandLists.html)


GoodTracksLoose (GTL)

a type of BABAR track list, defined in BetaMicro/BtaGoodTrkSelector.cc

Reference Link (http://www.slac.stanford.edu/BFROOT/www/doc/workbook/nanomicro/v8.6/Micro/Cand_Lists.html)


grid computing

Name given to automatic data and computational distribution to globally spread resources. BaBar has a group working on utilising this technology.

Reference Link (http://www.slac.stanford.edu/BFROOT/www/Computing/Offline/BaBarGrid/)


grl selector

grl selector is the name for a proton selector that was implemented by Margaret Haire. It is based on a method developed by Gerry Lynch. Items 43,49, and 87 in the "Hadron ID AWG" hypernews describe the method and the selector.

To add an entry to the Glossary use the BaBar Glossary Submission Form.


All comments, requests, and corrections are welcome. Send them by e-mail.


Project Lead: Ray Cowan
Project Supervision: Douglas Smith (SLAC Computing Services)

Last significant update: 10-Sept-2002