RF-thermal-structural-RF coupled analysis on the travelling wave disk-loaded accelerating structure

TL;DR

This paper presents a method for RF-thermal-structural-RF coupled analysis of traveling wave disk-loaded accelerating structures, validated against experimental data and applied to a specific linac structure using a single PC.

Contribution

The paper introduces a computationally efficient coupled analysis method for TW disk-loaded structures that can be performed on a single PC, validated with experimental results.

Findings

Good agreement between RF simulation and experimental data on BEPCII structure

Effective coupled analysis method demonstrated on NSC KIPT linac structure

Method enables comprehensive analysis without high-performance computing resources

Abstract

Travelling wave (TW) disk-loaded accelerating structure is one of the key components in normal conducting (NC) linear accelerators, and has been studied for many years. In the design process, usually after the dimensions of each cell and the two couplers are finalized, the structure is fabricated and tuned, and then the whole structure characteristics can be measured by the vector network analyzer. Before the structure fabrication, the whole structure characteristics are less simulated limited by the available computer capability. In this paper, we described the method to do the RF-thermal-structural-RF coupled analysis on the TW disk-loaded structure with one single PC. In order to validate our method, we first analyzed and compared our RF simulation results on the 3m long BEPCII structure with the corresponding experimental results, which shows very good consistency. Finally, the RF-thermal-structure-RF coupled analysis results on the 1.35m long NSC KIPT linac accelerating structure are presented.