Design of cryosorption pumps for TEST BEDS of ITER relevant Neutral Beam Injectors

The two identical cryopumps for IPP are foreseen to pump a hydrogen-throughput of 3 Pa m3/s (H2) with a pumping speed of 350 m3/s per pump. The pressure conditions must be maintained over 4 h pumping without regeneration of the cryopanels. For the ITER Neutral Beam Test Facility, design calculations to assess heat loads and pumping parameters of the cryopumps will be briefly described.