A beam profile monitor (BPM) based on a microchannel plate has been developed for muon beams with low transverse momentum for the measurement of the muon anomalous magnetic moment and electric dipole moment at high precision, with capability of diagnosing muon beams of kinetic energy range from a few keV to 4 MeV. The performance of the BPM has been evaluated using a surface muon beam at J-PARC and additionally with an ultraviolet (UV) light source. It has been confirmed that the BPM has a dynamic range from a few to 104 muons per bunch without saturation. The spatial resolution of the BPM has been estimated to be less than 0.30 mm. The positron background from muon decays is an obstacle in muon beam profile monitoring and a partial discrimination of the positrons has been achieved under discrete particle conditions.
|Number of pages
|Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
|Published - 2018 Aug 11
Bibliographical noteFunding Information:
We are grateful to the J-PARC personnel for the excellent machine operation. The experiment with muon beam was performed at the Materials and Life Science Experimental Facility of the J-PARC under a user program (Proposal No. 2015A0321). We thank Dr. T. U. Ito for his advice on the technical design. This work was supported by the JSPS KAKENHI Grant Numbers JP26287053 , JP15H03666 , JP16J07784 , the Korean National Research Foundation grants NRF-2015K2A2A4000092 , NRF-2015H1A2A1030275 , NRF-2015R1A4A1042542 , NRF-2017R1A2B3007018 , the Russian Foundation for Basic Research grant RFBR 17-52-50064 , which is a part of the Japan-Russia Research Cooperative Program and the Russian Science Foundation grant RNF-17-12-01036 .
© 2018 Elsevier B.V.
- Beam diagnostics
- Beam profile
- Low emittance muon beam
- Microchannel plate
ASJC Scopus subject areas
- Nuclear and High Energy Physics