Computer Science – Performance
Scientific paper
Sep 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994dpf..meetq...2.&link_type=abstract
Presented at the Meeting of the Division of Particles and Fields of the American Physical Society, Albuquerque, NM, 2-6 Aug. 199
Computer Science
Performance
Cosmic Rays, Particle Tracks, Scintillating Fibers, Scintillation Counters, Actuators, Data Acquisition, Performance Tests, Photons, Trigger Circuits
Scientific paper
The authors report on results of a cosmic-ray test of a 3,072 channel scintillating fiber tracker using Visible Light Photon Counter (VLPC) readout. This system is a prototype for the D0 detector tracking upgrade, and represents a configuration that is similar to that planned for the final detector. A detailed description of the cosmic ray test, including trigger, fiber configuration, lightguides, VLPC cassettes and cryogenics, calibration system, and DAQ is given. Tracking results with a muon momentum cutoff of 2.5 GeV/c include R-(phi) and R-Z resolution studies, light yield/mip, and efficiency measurements. Preliminary analysis gives a most probable value of 19.2 photoelectrons/mip per fiber doublet, an R-(phi) resolution of 163 microns (before corrections for fiber position survey), and an efficiency of nearly 100% after accounting for known dead channels in the system.
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