Title :
A high rate gas mixture for glass RPC operated in streamer mode
Author :
Kikuchi, N. ; Ando, S. ; Fujikawa, T. ; Hayasaka, H. ; Hoshi, Y. ; Kumagai, M. ; Nagamine, T. ; Neichi, K. ; Yamaguchi, A.
Author_Institution :
Dept. of Phys., Tohoku Univ., Sendai, Japan
Abstract :
In Belle, glass RPCs have operated in streamer mode with the Belle standard gas mixture. However, efficiencies of RPCs for the outermost few layers of the endcap region decrease from ∼95% to ∼50% due to hit-rate of 1.4 Hz/cm2 from neutron background originated from KEKB with higher beam current operation. To operate efficiently glass RPCs at this high background rate, high rate gas mixtures using SF6 have been tested. We report the performance of glass RPC.
Keywords :
ionisation chambers; position sensitive particle detectors; Belle standard gas mixture; KEKB; SF6 gas; beam current; endcap region; glass RPC; glass resistive plate chamber; high rate gas mixture; hit-rate; neutron background; streamer mode; Argon; Conductivity; Electrodes; Glass; Helium; Neutrons; Particle beams; Physics; Testing; US Department of Commerce;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2004 IEEE
Print_ISBN :
0-7803-8700-7
Electronic_ISBN :
1082-3654
DOI :
10.1109/NSSMIC.2004.1462229
