Apf方式 ih-dtlによるミューオン加速実証試験のための診断ビームラインの開発 development of a diagnostic beamline for the demonstration of the muon acceleration with an apf ih-dtl

The muon linear accelerator is under development for the muon g-2/EDM experiment in J-PARC. Since the first-stage acceleration with a radio frequency quadrupole (RFQ) was successful in 2017, the muon acceleration with a prototype of an inter-digital H-mode drift tube linac (IH-DTL) plans to be demonstrated at J-PARC MLF H-line as the next stage. The IH-DTL prototype will accelerate muons from 0.34MeV to 1.3MeV at a drive frequency of 324MHz. We designed a diagnostic beamline in order to efficiently detect the accelerated muon and measure an emittance. The beam intensity was expected to be ∼ 10−2 Hz and it shows that the muon acceleration test is feasible. In this paper, the feasibility of a demonstration of muon acceleration with the IH-DTL prototype and the basic design of a bending magnet and single-gap buncher for the diagnostic beamline are reported.