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First muon acceleration using a radio-frequency accelerator

Bae, S.*; Choi, H.*; Choi, S.*; Fukao, Yoshinori*; Futatsukawa, Kenta*; Hasegawa, Kazuo; Iijima, Toru*; Iinuma, Hiromi*; Ishida, Katsuhiko*; Kawamura, Naritoshi*; Kim, B.*; Kitamura, Ryo*; Ko, H. S.*; Kondo, Yasuhiro; Li, S.*; Mibe, Tsutomu*; Miyake, Yasuhiro*; Morishita, Takatoshi; Nakazawa, Yuga*; Otani, Masashi*; Razuvaev, G. P.*; Saito, Naohito; Shimomura, Koichiro*; Sue, Yuki*; Won, E.*; Yamazaki, Takayuki*

Muons have been accelerated by using a radio-frequency accelerator for the first time. Negative muonium atoms (Mu$$^{-}$$), which are bound states of positive muons and two electrons, are generated from through the electron capture process in an aluminum degrader. The generated Mu$$^{-}$$'s are initially electrostatically accelerated and injected into a radio-frequency quadrupole linac (RFQ). In the RFQ, the Mu$$^{-}$$'s are accelerated to 89 keV. The accelerated Mu$$^{-}$$'s are identified by momentum measurement and time of flight. This compact muon linac opens the door to various muon accelerator applications including particle physics measurements and the construction of a transmission muon microscope.

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Category:Physics, Nuclear

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