FRIB Cryogenic Distribution System and Status

[摘要] The MSU-FRIB cryogenic distribution system supports the 2 K primary, 4 K primary, and 35 - 55 K shield operation of more than 70 loads in the accelerator and the experimental areas. It is based on JLab and SNS experience with bayonet-type disconnects between the loads and the distribution system for phased commissioning and maintenance. The linac transfer line, which features three separate transfer line segments for additional independence during phased commissioning at 4 K and 2 K, connects the folded arrangement of 49 cryomodules and 4 superconducting dipole magnets and a fourth transfer line supports the separator area cryo loads. The pressure reliefs for the transfer line process lines, located in the refrigeration room outside the tunnel/accelerator area, are piped to be vented outdoors. The transfer line designs integrate supply and return flow paths into a combined vacuum space. The main linac distribution segments are produced in a small number of standard configurations; a prototype of one such configuration has been fabricated at Jefferson Lab and has been installed at MSU to support testing of a prototype FRIB cryomodule.

[发布机构] Thomas Jefferson National Accelerator Facility, Newport News; VA; 23606, United States^1;Facility for Rare Isotope Beams (FRIB), Michigan State University, MI; 48824, United States^2

[效力级别] 物理学 [学科分类] 材料科学（综合）

[关键词] Combined vacuum;Distribution systems;Jefferson Lab;Pressure relief;Superconducting dipoles;Support testing;Transfer line design;Transfer lines