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Report No.

Result of the first muon acceleration with radio frequency quadrupole

Kitamura, Ryo*; Otani, Masashi*; Fukao, Yoshinori*; Futatsukawa, Kenta*; Kawamura, Naritoshi*; Mibe, Tsutomu*; Miyake, Yasuhiro*; Yamazaki, Takayuki*; Kondo, Yasuhiro   ; Hasegawa, Kazuo; Morishita, Takatoshi  ; Bae, S.*; Kim, B.*; Razuvaev, G.*; Iinuma, Hiromi*; Nakazawa, Yuga*; Ishida, Katsuhiko*; Saito, Naohito; Sue, Yuki*

Muon acceleration using radio-frequency accelerators makes it possible to precisely measure the muon anomalous magnetic moment and the electric dipole moment. The first muon acceleration was demonstrated using a radio-frequency quadrupole (RFQ) linac. A negative muonium ion (Mu$$^{-}$$) with less than 2 keV energy was produced from an incident muon with 3 MeV energy using a thin aluminum foil target in order to cool the muon beam for the acceleration, because the designed input energy of the RFQ is 5.6 keV. The Mu$$^{-}$$ was first accelerated to 5.6 keV using an electrostatic accelerator, and was subsequently accelerated to 90 keV using the RFQ. This accelerated Mu$$^{-}$$ was selected using a diagnostic beam line and was identified based on Time-Of-Flight measurements.



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