A Large Area Timing RPC

Details A Large Area Timing RPC A Large Area Timing RPC

2001-03-26

arxiv.org/abs/physics/0103086v1

ICFA Instrum.Bull. 23 (2001) 1-15; Nucl.Instrum.Meth. A485 (2002) 328-342

Physics

Instrumentation and Detectors

22 pages, 10 figures (submitted to Nucl. Instr. and Meth.)

Scientific paper

10.1016/S0168-9002(01)02119-2

A large area Resistive Plate Chamber (RPC) with a total active surface of 160x10 cm2 was built and tested. The surface was segmented in two 5 cm wide strips readout on both ends with custom, very high frequency, front end electronics. A timing resolution between 50 and 75 ps sigma with an efficiency for Minimum Ionizing Particles (MIPs) larger than 95% was attained over the whole active area, in addition with a position resolution along the strips of 1.2 cm. Despite the large active area per electronic channel, the observed timing resolution is remarkably close to the one previously obtained (50 ps sigma) with much smaller chambers of about 10 cm2 area. These results open perspectives of extending the application of timing RPCs to large area arrays exposed to moderate particle multiplicities, where the low cost, good time resolution, insensitivity to the magnetic field and compact mechanics may be attractive when compared with the standard scintillator-based Time-of-Flight (TOF) technology.

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