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Report No.

Performance test of a helium refrigerator for the cryogenic hydrogen system in J-PARC

Tatsumoto, Hideki; Aso, Tomokazu ; Kato, Takashi; Otsu, Kiichi; Hasegawa, Shoichi   ; Maekawa, Fujio  ; Futakawa, Masatoshi  

In J-PARC, a cryogenic hydrogen system, which plays a role in providing supercritical hydrogen with a pressure of 1.5 MPa and a temperature of 20 K to three moderators, has been designed. The performance test of the helium refrigeration system was conducted independently. The helium refrigeration system was cooled down to 18 K within 4.5 hours, and the refrigerator power of 6.45 kW at 15.6 K was confirmed. The performance test results proved that the helium refrigerator met the performance requirements.



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