Operation, maintenance and technical development of cryogenic hydrogen system at MLF (JFY20182022)

Aso, Tomokazu ; Ariyoshi, Gen  ; Muto, Hideki*; Tanaka, Shigeto*

The cryogenic hydrogen system of the J-PARC center is one of the most important pieces equipment, which is a refrigeration system for moderating (cooling) the high energy neutrons generated the spallation neutron source of the Material and Life Science Experimental Facility (MLF) that is used by many users from Japan and abroad. Since the first operation of the MLF for neutron use in 2008, the cryogenic hydrogen system has been continuously operated and maintained, and related technology development has been carried out. This report summarized these activities over the past five years.