New Muon Kicker System for the Decay Muon Beamline at J-PARC

Abstract

Abstract At J-PARC Muon Science Facility a conventional superconducting decay muon beamline (D-Line) was constructed that can extract surface (positive) muons and decay positive/negative muons up to 120 MeV/c. This beamline will be used for various kinds of muon experiments like μSR, muon catalyzed fusion and nondestructive elements analysis. Similarly to the ISIS facility at RAL, the muon beam produced at J-PARC has a double-pulsed structure. To utilize the muon beam more efficiently, a muon kicker system will be installed to separate the double-pulsed beam and send the two pulses to two experimental areas simultaneously, allowing μSR experiments with single-pulsed muons. A muon kicker system, comprising two magnetic kicker magnets, two switchyard magnets and a septum magnet, is now been constructed. Single-pulsed muon beam up to 60 MeV/c can be transported. New state-of-the-art power supplies are also been fabricated. The installation in the beamline is planned in summer 2011.