Ray tracing simulations of bending magnet sources with SHADOW4

TL;DR

This paper details the algorithms and procedures used in SHADOW4 for simulating bending magnet sources, including spectral, angular, intensity, and polarization distributions, with comparisons to phase space and source size calculations.

Contribution

It introduces specific algorithms in SHADOW4 for accurate ray tracing of bending magnet sources and compares different methods for source size estimation.

Findings

Successful simulation of spectral and angular distributions

Comparison of source size calculations with ray tracing results

Application to ESRF1 and ALSU storage rings

Abstract

We explain the algorithm employed in SHADOW4 to generate bending magnet sources. We provide an overview of the fundamental equations used to calculate the spectral and angular distributions of synchrotron emission from bending magnets. We outline the procedures for ray sampling. We present examples for intensity and polarization of the bending magnet at the old ESRF1 storage ring, and phase spaces for the bending magnet of the upcoming ALSU ring. Finally, we discuss the calculation of the effective source size and compare it with ray tracing.