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Report No.

Development of negative muonium ion source for muon acceleration

Kitamura, Ryo   ; Bae, S.*; Choi, S.*; Fukao, Yoshinori*; Iinuma, Hiromi*; Ishida, Katsuhiko*; Kawamura, Naritoshi*; Kim, B.*; Kondo, Yasuhiro   ; Mibe, Tsutomu*; Miyake, Yasuhiro*; Otani, Masashi*; Razuvaev, G. P.*; Saito, Naohito; Shimomura, Koichiro*; Strasser, P.*

A negative muonium ion (Mu$$^{-}$$) source using an aluminum foil target was developed as a low-energy muon source. An experiment to produce Mu$$^{-}$$ ions was conducted to evaluate the performance of the Mu$$^{-}$$ ion source. The measured event rate of Mu$$^{-}$$ ions was $$(1.7 pm 0.3) times 10^{-3}$$ Mu$$^{-}$$/s when the event rate of the incident muon beam was $$1.3times10^{6}$$/s. The formation probability, defined as the ratio of the Mu$$^{-}$$ ions to the incident muons on the Al target, was $$(1.1 pm 0.2(textrm{stat.})^{-0.0}_{+0.1}(textrm{syst.})) times10^{-6}$$. This Mu$$^{-}$$ ion source boosted the development of the muon accelerator, and the practicality of this low-energy muon source obtained using a relatively simple apparatus was demonstrated.



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Category:Physics, Nuclear



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