Nuclear Techniques ›› 2020, Vol. 43 ›› Issue (3): 30202-030202.doi: 10.11889/j.0253-3219.2020.hjs.43.030202


Multi-physics field coupling analysis of radio frequency quadrupole cavity

Bo ZHAO1,2,Bin ZHANG2,Shuping CHEN1(),Fengfeng WANG2,Tieming ZHU2,Xiaofeng JIN2   

  1. 1.Institute of Petrochemical Technology, Lanzhou University of Technology, Lanzhou 730050, China
    2.Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2019-08-22 Revised:2019-10-14 Online:2020-03-15 Published:2020-03-24
  • Contact: Shuping CHEN
  • About author:ZHAO Bo, female, born in 1985, graduated from Dalian University of Technology with a master’s degree in 2011, doctoral student, focusing on accelerator technology and applications
  • Supported by:
    National Natural Science Foundation of China(11427904)

Abstract: Background

Radio frequency quadrupole (RFQ) field accelerator causes temperature rise and thermal deformation during high power operation. Among many multi-physical analysis methods for RFQ cavity, these models are limited to 2D RFQ section or 3D RFQ local structures whilst the fluid flow motion was ignored.


This study aims to propose a noval three-dimensional multi physical field numerical method for coupling analysis of RFQ cavity.


Combined with computational fluid dynamics (CFD) and heat flow coupling, electromagnetic, fluid, thermal, structure were integrated into electromagnetic multi physical field coupling analysis. A 81.25 MHz RFQ cavity was taken as sample for verification and the heat transfer effects of three (Standard, RNG, Realizable)k-ε turbulence models under the same experimental conditions were analyzed.

Results & Conclusions

The results show that the CFD numerical simulation method can better simulate the steady-state heat transfer of RFQ accelerator. The feasibility and reliability of the method were verified by comparison with the experimental results. The variation of cavity temperature, structure and frequency under different parameters were analyzed using a suitable turbulence model. Hence this study provides an effective numerical simulation platform for the structural optimization and performance improvement of the accelerators in future.

Key words: Computational fluid dynamics, Accelerator, Coupled, Numerical simulation

CLC Number: 

  • TL29