J-PARC decay muon channel construction status

Strasser, P.*; Shimomura, Koichiro*; Koda, Akihiro*; Kawamura, Naritoshi*; Fujimori, Hiroshi*; Makimura, Shunsuke*; Kobayashi, Yasuo*; Nakahara, Kazutaka*; Kato, Mineo*; Takeshita, Soshi*; Hiraishi, Masatoshi*; Miyazaki, Masanori*; Higemoto, Wataru  ; Ito, Takashi   ; Ninomiya, Kazuhiko; Ishida, Katsuhiko*; Kubo, Kenya*; Kadono, Ryosuke*; Nishiyama, Kusuo; Miyake, Yasuhiro*

The new Muon Science Facility (MUSE) that is now under construction at J-PARC in the Materials and Life Sciences Facility (MLF) building will comprise four types of muon channels. In the first stage, a conventional superconducting decay muon channel (D-Line) was constructed, which can extract surface (positive) muons with an expected muon yield of /s and decay positive/negative muon up to 120 MeV/c, with an expected muon yield of a few /s at 60 MeV/c for both positive and negative muons. This channel will be used for various kinds of muon experiments like SR, muon catalyzed fusion and nondestruction elements analysis.