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Report No.
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Low power measurement of a 1300-MHz RFQ cold model

Kondo, Yasuhiro; Morishita, Takatoshi; Tamura, Jun; Otani, Masashi*

A muon linac development for a new muon g-2 experiment is now going on at J-PARC. Muons from the muon beam line (H line) at the J-PARC muon science facility are once stopped in a silica-aerogel target, and room temperature muoniums are evaporated from the aerogel. They are dissociated with lasers, then accelerated up to 212 MeV using a linear accelerator. In the current reference design, a 324-MHz radio frequency quadrupole (RFQ) and an interdigital H-mode drift tube linac (IH-DTL) are used for the low beta acceleration. We propose a 1300 MHz (L band) RFQ instead of the 324 MHz RFQ and IH-DTL as an alternative to simplify the configuration of the muon linac. In this paper, the present status of the design and the measurement of a cold model of this world first L-band RFQ is described.

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