Abstract
A negative muonium ion () source using an aluminum foil target (Al target) was developed as a low-energy muon source. ions are produced by irradiating the Al target with a 3-MeV positive muon () beam and observed using a microchannel plate. An experiment to produce ions was conducted to evaluate the performance of this ion source. The measured event rate of ions was when the event rate of the incident beam was . 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 ions to the incident muons on the Al target, was . This ion source was first adopted in the commissioning of the muon accelerator at the D-line, and the event rate of the accelerated ions was consistent with the expectation. This 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.
1 More- Received 24 June 2020
- Revised 29 January 2021
- Accepted 19 February 2021
DOI:https://doi.org/10.1103/PhysRevAccelBeams.24.033403
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Published by the American Physical Society