Thermal analysis of UHV beam tube of SIS100 for FAIR

We have studied the effect of eddy current joule loss on the beam tube of SIS100 superconducting magnet. In order to keep the ultra high vacuum (UHV) in the range of 10-12 mbar inside beam tube, we design beam tube as an extended cryopump. The design optimization procedures enable us to reduce the loss down to 11.2 % of total dynamic loss of SIS100 superconducting magnet. Appropriate cooling pipe position is also simulated to find optimal temperature profile which satisfies our design criterion. Design activities and related numerical simulation results are presented.