Design and construction of the ultra-slow muon beamline at J-PARC/MUSE

P Strasser, Y Ikedo1, S Makimura, J Nakamura, K Nishiyama1, K Shimomura1, H Fujimori, T Adachi1, A Koda1, N Kawamura1, Y Kobayashi1, W Higemoto, TU Ito, T Nagatomo, E Torikai, R Kadono and Y Miyake

At the J-PARC Muon Science Facility (MUSE), a new Ultra-Slow Muon beamline is being constructed to extend the SR technique from bulk material to thin lms, thus empowering a wide variety of surface and nano-science studies, and also a novel 3D imaging with the \ultra-slow muon microscope”. Ultra-slow muons will be produced by the re-acceleration of thermal muons regenerated by the laser resonant ionization of muonium atoms evaporated from
a hot tungsten foil, a method that originated from the Meson Science Laboratory at KEK. The design parameters, construction status and initial beam commissioning are reported.

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