Spallation Neutron Source Cryomodule Heat Loads and Thermal Design.

Daly, E. F. ; Ganni, V. ; Rode, C. H.

Technical Information Center Oak Ridge Tennessee

关键词: Cryogenics;    Heat load;    Spallation;    Beam dynamics;    Neutron sources;   

RP-ID  :  DE2004804860

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

When complete, the Spallation Neutron Source (SNS) will provide a 1 GeV, 2 MW beam for experiments. One portion of the machine's linac consists of over 80 Superconducting Radio Frequency (SRF) 805 MHz cavities housed in a minimum of 23 cryomodules operating at a saturation temperature of 2.1 K. Minimization of the total heat load is critical to machine performance and for efficient operation of the system. The total heat load of the cryomodules consists of the fixed static load and the dynamic load, which is proportional to the cavity performance. The helium refrigerator supports mainly the cryomodule loads and to a lesser extent the distribution system loads. The estimated heat loads and calculated thermal performance are discussed along with two unique features of this design: the helium heat exchanger housed in the cryomodule return end can and the helium gas cooled fundamental power coupler.