Title :
A study of non-flammable gas mixture for resistive plate counter
Author :
Takamatsu, H. ; Abe, K. ; Hoshi, Y. ; Ishikawa, M. ; Kawamura, N. ; Kawasaki, H. ; Nagamine, T. ; Nakajima, T. ; Neichi, K. ; Takayama, T. ; Yamaguchi, A. ; Yuta, H.
Author_Institution :
Tohoku Gakuin Univ., Tagajo, Japan
Abstract :
The good time and position resolution of the resistive plate counter (RPC) make it on attractive detector for muon trigger system of collider experiment. The standard gas mixture (Ar:68%, +iso-C4H10:30%, +Freon:2%) used for RPC is very flammable when leaked into air. In view of safety issues, we have been studying Ar+CO2+iso-C4H10+Freon gas mixture as a function of ratio Ar:CO2 and with the maximum iso-C4H10 allowed in non-flammable gas mixture for ABS electrodes. The main characteristic of the various mixture have been measured: single count rate versus high voltage and counting efficiency. We have found a set of non-flammable mixture of the kind of Ar+CO2 +Freon containing less than ~8.4% of iso-C4H10 for muon counter of KEK-B
Keywords :
ionisation chambers; muon detection; position sensitive particle detectors; safety; streamer chambers; ABS electrodes; Ar; CO2; muon counter; muon trigger system; nonflammable gas mixture; position resolution; resistive plate counter; safety; Argon; Conductivity; Counting circuits; Electrodes; Fires; Flammability; Gases; Ignition; Ink; Testing;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference Record, 1995., 1995 IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-3180-X
DOI :
10.1109/NSSMIC.1995.504277
