Materials and Life Science Experimental Facility at the Japan Proton Accelerator Research Complex IV: The Muon Facility

Abstract

A muon experimental facility, known as the Muon Science Establishment (MUSE), is one of the user facilities at the Japan Proton Accelerator Research Complex, along with those for neutrons, hadrons, and neutrinos. The MUSE facility is integrated into the Materials and Life Science Facility building in which a high-energy proton beam that is shared with a neutron experiment facility delivers a variety of muon beams for research covering diverse scientific fields. In this review, we present the current status of MUSE, which is still in the process of being developed into its fully fledged form.

Compact buncher cavity for muons accelerated by a radio-frequency quadrupole

“…The buncher cavity is designed for measuring the longitudinal bunch size after acceleration with the RFQ. The experiment was conducted at the J-PARC muon science facility (MUSE) [21]. The J-PARC MUSE provides a pulsed muon (µ + ) beam with a 25-Hz repetition rate.…”

Materials and Life Science Experimental Facility at the Japan Proton Accelerator Research Complex I: Pulsed Spallation Neutron Source

“…Figure 17 shows a plan view from the 3 GeV Rapid Cycling Synchrotron to the MLF building. In the MLF building, the Muon Science facility (MUSE) [61,62] is arranged upstream of the spallation neutron source, where a 2-cm-thick carbon graphite target is used for the muon production at 33 m upstream of the neutron production mercury target in a cascade scheme. The proton beam loses about 6.5% by the nuclear interactions at the graphite target.…”

Commissioning of the Diagnostic Beam Line for the Muon RF Acceleration with H− Ion Beam Derived from the Ultraviolet Light

“…Figure 2 shows the experimental setup for muon RF acceleration. First, the surface positive muon beam is provided from J-PARC MLF (material and life science experimental facility) [7]. Kinetic energy is about 3 MeV.…”