Magnetic system for cleaning the gamma beam at the LUE-40 electron linac output

TL;DR

This paper presents the design, modeling, and testing of a magnetic cleaning system using permanent magnets to produce a pure gamma beam at the LUE-40 electron linac for studying photo-nuclear reactions.

Contribution

It introduces a novel magnetic cleaning system based on permanent magnets for effectively separating electron and gamma beams at the LUE-40 linac.

Findings

The system achieves a maximum on-axis field of 0.9 T.

It provides sufficient beam separation at over 90 mm from the magnet.

The design is based on commercially available permanent magnets.

Abstract

The bremsstrahlung of accelerated electrons passing through a converter is used to study multiparticle photo-nuclear reactions. The results of calculations, numerical modeling, design, and testing of a special magnetic cleaning system to obtain a "pure" beam of bremsstrahlung quanta when studying the cross-sections of such reactions at the LUE-40 linac are presented. The system is based on commercially available permanent magnets of rectangular cross-sections. The maximum on-axis field is 0.9 T, which provides sufficient separation of the electron beam and gamma rays at a distance of more than 90 mm from the magnet.