2018•JACOWOpen access
Muon Acceleration Test with the RFQ Towards the Development of the Muon Linac
R. Kitamura, Sunghan Bae, Seonho Choi, Y. Fukao, K. Futatsukawa, Kazuo Hasegawa, Toru Iijima, H. Iinuma, Katsuhiko Ishida, Naritoshi Kawamura, Bongho Kim, Yasuhiro Kondo, Sirui Li, T. Mibe, Yasuhiro Miyake, Takatoshi Morishita, Yuga Nakazawa, M. Otani, G.P. Razuvaev, Naohito Saito, Y. Sue, T. Yamazaki
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Abstract
The muon linac to accelerate muons 212 MeV is planned in order to measure the muon dipole moments precisely in the J-PARC. The muon acceleration with a RF accelerator hasn't been demonstrated yet in the world. Therefore the muon acceleration test with the RFQ as the feasibility test of the muon linac was demonstrated at the Muon D line in the J-PARC MLF. Conventional muons are cooled with producing ultra-slow muons using the muonium production and the ionization laser for the muon linac. However these apparatuses couldn't be used because of the limitation of the experimental area in the acceleration test. Therefore the conventional muon was converted to the negative muonium ion (Mu-) with less than 2 keV using the thin aluminum foil target as the easy cooling method. The Mu- was finally accelerated to 90 keV using the RFQ. The accelerated Mu- was selected with a diagnostic beam line and identified with the Time-Of-Flight measurement using a MCP detector. The result of the world's first muon acceleration test with the RFQ will be reported in this presentation.