SYNCHROTRON-RADIATION CALCULATIONS USING THE EGS4 CODE

Distributions of synchrotron radiation intensity as a function of phot on energy and opening angle are complicated which, together with elabo rate geometries, make the Monte Carlo technique the method of choice f or most synchrotron radiation calculations. This paper presents synchr otron radiation calculations using the EGS4 Monte Carlo code. Two exam ples related to the SLAG PEP-II project are given. The first is the ca lculation of the dose to the magnet coil insulation from synchrotron r adiation escaping the stainless steel vacuum chamber in the straight s ections of the Nigh Energy Ring. Emphasis is given on the spectral sam pling and the normalization of the Monte Carlo dose results. The secon d is the calculation of the dose environment in the tunnel resulting f rom synchrotron radiation escaping the aluminum vacuum chamber and ant echamber of the Low Energy Ring with emphasis on the opening-angle pro file.