Synchrotron radiation calculations using the EGS4 code

Distributions of synchrotron radiation intensity as a function of photon energy and opening angle are complicated which, together with elaborate geometries, make the Monte Carlo technique the method of choice for most synchrotron radiation calculations. This paper presents synchrotron radiation calculations using the EGS4 Monte Carlo code. Two examples related to the SLAC PEP-II project are given. The first is the calculation of the dose to the magnet coil insulation from synchrotron radiation escaping the stainless steel vacuum chamber in the straight sections of the High Energy Ring. Emphasis is given on the spectral sampling and the normalization of the Monte Carlo dose results. The second is the calculation of the dose environment in the tunnel resulting from synchrotron radiation escaping the aluminum vacuum chamber and antechamber of the Low Energy Ring with emphasis on the opening-angle profile.