Title :
Development of a liquid Xe photon detector for μ→eγ decay search experiment at PSI
Author :
Mihara, S. ; Doke, T. ; Kamiya, Y. ; Mashimo, T. ; Mori, T. ; Nishiguchi, H. ; Ootani, W. ; Orito, S. ; Ozone, K. ; Sawada, R. ; Suzuki, S. ; Tejuna, G. ; Terasawa, K. ; Yahagi, K. ; Yamashita, M. ; Yashima, J.
Author_Institution :
Int. Center for Elementary Particle Phys., Tokyo Univ., Japan
Abstract :
We are developing a new type of photon detector for an experiment searching for muon decays to positron+gamma with a sensitivity of 10-14 branching ratio by using the world most intense continuous muon beam provided at PSI. In this experiment the photon detector utilizes liquid xenon as a scintillation material because of its fast response, large light output yield, and high density. Scintillation light emitted in liquid Xe is directly observed by photomultipliers (PMTs) located in a liquid without any transmission window in order not to lose light yield. To study the detector response to gamma rays we constructed a prototype with an active volume of 2300 cm3 surrounded by 32 PMTs. The PMT was newly developed so as to be operated even in liquid Xe at 165 K. The energy, position, and timing resolution have been evaluated with gamma-ray sources from 320 keV to 1835 keV. The performance of the prototype is presented
Keywords :
gamma-ray detection; liquid scintillation detectors; photomultipliers; position sensitive particle detectors; 165 K; 320 to 1835 keV; Xe; energy resolution; gamma rays; light yield; liquid Xe photon detector; photomultipliers; position resolution; timing resolution; Energy resolution; Gamma ray detection; Gamma ray detectors; Gamma rays; Mesons; Photomultipliers; Prototypes; Solid scintillation detectors; Timing; Xenon;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2000 IEEE
Conference_Location :
Lyon
Print_ISBN :
0-7803-6503-8
DOI :
10.1109/NSSMIC.2000.949134
