TY - JOUR

T1 - Development of negative muonium ion source for muon acceleration

AU - Kitamura, R.

AU - Bae, S.

AU - Choi, S.

AU - Fukao, Y.

AU - Iinuma, H.

AU - Ishida, K.

AU - Kawamura, N.

AU - Kim, B.

AU - Kondo, Y.

AU - Mibe, T.

AU - Miyake, Y.

AU - Otani, M.

AU - Razuvaev, G. P.

AU - Saito, N.

AU - Shimomura, K.

AU - Strasser, P.

N1 - Funding Information: We would like to deeply thank the RIKEN Advanced Meson Science Laboratory and the J-PARC MUSE group for their significant supports. This work is supported by JSPS KAKENHI Grants No. JP25800164, No. JP15H03666, No. JP16H03987, No. JP15H05742, No. JP16J07784, and No. JP18H03707. This work is also supported by the Korean National Research Foundation Grants No. NRF-2015H1A2A1030275, No. NRF- 2015K2A2A4000092, and No. NRF-2017R1A2B3007018; the Russian Foundation for Basic Research Grant No. RFBR 17- 52-50064; and the Russian Science Foundation Grant No. RNF 17-12-01036. The muon experiment at the Materials and Life Science Experimental Facility of the J-PARC was performed under user programs (Proposal No. 2016A0067). Publisher Copyright: © 2021 American Physical Society. All rights reserved. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/3/24

Y1 - 2021/3/24

N2 - A negative muonium ion (Mu-) source using an aluminum foil target (Al target) was developed as a low-energy muon source. Mu- ions are produced by irradiating the Al target with a 3-MeV positive muon (μ+) beam and observed using a microchannel plate. An experiment to produce Mu- ions was conducted to evaluate the performance of this Mu- ion source. The measured event rate of Mu- ions was (1.7±0.3)×10-3 Mu-/s when the event rate of the incident μ+ beam was 1.3×106/s. The experiment was conducted at the Muon Science Establishment, D-line in the Materials and Life Science Experimental Facility within the Japan Proton Accelerator Research Complex. The formation probability, defined as the ratio of the Mu- ions to the incident muons on the Al target, was (1.1±0.2(stat)+0.1-0.0(syst))×10-6. This Mu- ion source was first adopted in the commissioning of the muon accelerator at the D-line, and the event rate of the accelerated Mu- ions was consistent with the expectation. 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.

AB - A negative muonium ion (Mu-) source using an aluminum foil target (Al target) was developed as a low-energy muon source. Mu- ions are produced by irradiating the Al target with a 3-MeV positive muon (μ+) beam and observed using a microchannel plate. An experiment to produce Mu- ions was conducted to evaluate the performance of this Mu- ion source. The measured event rate of Mu- ions was (1.7±0.3)×10-3 Mu-/s when the event rate of the incident μ+ beam was 1.3×106/s. The experiment was conducted at the Muon Science Establishment, D-line in the Materials and Life Science Experimental Facility within the Japan Proton Accelerator Research Complex. The formation probability, defined as the ratio of the Mu- ions to the incident muons on the Al target, was (1.1±0.2(stat)+0.1-0.0(syst))×10-6. This Mu- ion source was first adopted in the commissioning of the muon accelerator at the D-line, and the event rate of the accelerated Mu- ions was consistent with the expectation. 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.

UR - http://www.scopus.com/inward/record.url?scp=85103787002&partnerID=8YFLogxK

U2 - 10.1103/PhysRevAccelBeams.24.033403

DO - 10.1103/PhysRevAccelBeams.24.033403

M3 - Article

AN - SCOPUS:85103787002

VL - 24

JO - Physical Review Accelerators and Beams

JF - Physical Review Accelerators and Beams

SN - 2469-9888

IS - 3

M1 - 033403

ER -