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Plastic comb structures with wires strung between the teeth of the comb structure.A plastic cover plate forms the 4th surface of the tube. The surface of the comb structure is coated with a graphite bearing paint. The wire is held at high voltage. Limited streamers are produced when charged particles interact in the gas of contained in the comb structure. Pickup electrodes are located outside the plastic structure.(Also known at Limited Streamer Tubes (LST).) Technology chosen by BaBar for upgrade of the Instrumented Flux Return (barrel section).

Reference Link (http://ccdb3fs.kek.jp/cgi-bin/img/allpdf?197704192)

The set of activities performed for the Instrumented Flux Return detector subsytems maintenance

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

Inclusive Hadronic B Decays analysis working group

Reference Link (http://BFROOT/www/Physics/Analysis/AWG/IHBDecays/IHBDecays.html)

Inclusive Hadronic Particle Spectra Analysis Working Group

Reference Link (http://www.slac.stanford.edu/BFROOT/www/Physics/Analysis/AWG/ihaps/)

This type of module acts as the source of data. There will be a module to read from the online system or event generators. Only one input module may be active in a path at any one time.

Reference Link (http://www.slac.stanford.edu/BFROOT/www/doc/workbook/framework1/framework1.html)

The basic computational module of the BaBar online detector control system. At present (April 2002) the IOCs in use are Motorola MV177 (Power PC based) cards for use in VME crates. These run the VxWorks real time operating system.

Reference Link (http://www.vme.ru/pdf/MVME177.pdf)

The basic EPICS data gathering processor. In our case they are all Motorola MVME 177 SBCs. (Part of the control system of PEP-II.)

I/O Boards are used in BaBaR Detector DAQ systems. The EMC DAQ uses two different types of I/O Boards, see BIOB and EIOB.

Input/Output Controller (IOC), for BaBar, refers to a VME crate running VxWorks, usually on an mv177 CPU with other controller boards installed for the purpose of controlling instrumentation and hardware. The other boards used at BaBar are, for eg., CAEN controllers, VSAM (VxWorks Smart Analog Module), SIAM, CANbus, GPIB, etc. At BaBar, there are 17 IOCs used as part of the Online Detector Controls.

The BaBar Instrumented Flux Return, (IFR), is designed to identify muons with minimum momentum around 0.5GeV/c and to detect neutral hadrons.

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

This is the cosmic particle trigger of the detector's Level 1 trigger system.

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

The point of interaction between two particles. In BaBar this is the interaction point between a beam of positrons and a beam of electrons. The IP of study in BaBar is within the detector at IR2.

The PEPII interaction region in which BaBar is located.

This committee represents the funding agencies that support BaBar. It is chaired by the SLAC Director of Research.

Instantaneous luminosity is measured usually in cm^-2s^-1. Integrated luminosity is a measure of the total luminosity and is thus measured in cm^-2. It is useful to use inverse barns (1 barn = 10^-28m^2) to express this. It then becomes easy using the cr oss-section for a particular interaction to predict the number of such events expected.

Instantaneous luminosity is measured usually in cm^-2s^-1. Integrated luminosity is a measure of the total luminosity and is thus measured in cm^-2. It is useful to use inverse barns (1 barn = 10^-28m^2) to express this. It then becomes easy using the cr oss-section for a particular interaction to predict the number of such events expected.

This is a Babar online environment defined command. Its main purpose is to set the OO_FD_BOOT environment variable to point to the IR2 production data base with the name of ir2boot. Do not use this command if you are not sure what you are doing. Acces ses to ir2boot from outside IR2 are blocked - and inside the IR2 environment they may leave locks affecting our ability to take data.

National Institute of Nuclear Physics. The main Italian institution in the field of Nuclear and High Energy Physics.

Reference Link (http://www.infn.it)

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

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Last significant update: 10-Sept-2002