Title :
Physics Performance of the Barrel RPC System of the HARP Experiment
Author :
Bogomilov, M. ; Artamonov, A. ; Giani, S. ; Kolev, D. ; Panman, J. ; Tsenov, R. ; Tsukerman, I.
Author_Institution :
Dept. of Atomic Phys., Univ. of Sofia
fDate :
4/1/2007 12:00:00 AM
Abstract :
The physics performance of the barrel RPC system of the HARP experiment is described. In the barrel two sets of fifteen identical resistive plate chambers (RPCs) have been operated in 2001 and 2002 as a part of the HARP experiment at the CERN PS accelerator. For the first time under real experimental conditions RPCs have bean applied for particle identification (PID) by measuring the particle´s time-of-flight (ToF). The procedure developed for the RPC calibration, based on reconstructed tracks in the HARP Time Projection Chamber (TPC), is described in detail. Intrinsic RPC time resolutions of 141 ps and a combined time resolution of the large angle TOF system of 180 ps are obtained. The effective resolution of the comparison of predicted and measured ToF is 305 ps in the region of interest for this experiment. The PID capabilities of the system are demonstrated. An average efficiency of the RPC counters of about 97% is measured
Keywords :
calibration; particle tracks; readout electronics; time of flight spectrometers; time projection chambers; CERN PS accelerator; HARP experiment; HARP time projection chamber; RPC calibration; RPC time resolutions; TOF system; TPC; barrel RPC system; particle identification; particle time-of-flight; readout channel; reconstructed tracks; resistive plate chambers; Calibration; Detectors; Magnetic field measurement; Particle beam measurements; Particle beams; Particle measurements; Particle tracking; Physics; Solids; Spectroscopy; Gaseous detector; HARP; particle identification; resistive plate chamber (RPC); time-of-flight (TOF);
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2006.890323
