Temperature Rise Calculations for the Beam Pipe in the SLC Arcs

摘要

This note presents the results of EGS calculations for 50 GeV electron beams showering in 1mm thick slabs of copper and aluminum at glancing angles. The maximum temperature rise for 50 mu (Gaussian sigma) beams of 5 x 10 exp 10 e exp - /pulse was found to increase with angle, ranging about: 300 to 700 exp 0 C/pulse (copper), and 50 to 100 exp 0 C/pulse (aluminum) for angles of incidence between 0.1 to 10 mradians. The results are also applicable to slabs thicker than 1mm within this angular range. For larger angles, where shower leakage out the back becomes important, the slabs were made thicker. These extended results (see last figure) are applicable for all angles of incidence and should be useful for calculating the maximum temperature rise in such devices as collimators and slits. (ERA citation 09:029102)