Design and Measurement of Dipole Magnets for CSNS 1.6GeV RCS

TL;DR

This paper details the design, measurement, and testing of dipole magnets for the CSNS RCS, focusing on improving magnetic field quality and reducing eddy currents to ensure reliable high-frequency operation.

Contribution

It presents new design methods and measurement techniques for dipole magnets tailored for high-frequency proton acceleration in CSNS RCS.

Findings

Improved magnetic field uniformity in the dipole magnets.

Reduced eddy currents in the iron core.

Successful prototype testing confirming design effectiveness.

Abstract

The Rapid Cycling Synchrotron (RCS) in Chinese Spallation Neutron Source (CSNS) accelerates proton beam from 80Mev to 1.6GeV at a repetition rate of 25Hz. All dipole magnets of RCS are operated at AC with biased DC. Aiming at the properties of these dipole magnets, we take some methods to improve magnetic field quality in the good region and reduce eddy currents in the iron core . In this paper, we would present the process of the magnet design and temperature rise calculation. At the same time, the field measurement results and temperature test of the prototype magnet are also described and discussed.