Abstract
Purpose
A 325-MHz bi-periodic on-axis coupled accelerating structure prototype which consists of two bi-periodic accelerating modules is under fabrication in the Institute of High Energy Physics, Beijing, dedicated to a 10-MeV/100 kW industrial linear electron accelerator. According to the beam dynamics study, the average power dissipated in the prototype cavity is about 19.1 kW. Effective cooling scheme is one of the most important issues in the high-power operation.
Methods
This paper mainly deals with the RF, thermal and structural coupled analyses of the accelerating structure prototype with the help of the ANSYS code. The cooling scheme is optimized to minimize the temperature rise, displacement and von Mises stresses.
Results
The temperature and stress distributions in the steady state are presented. The maximum von Mises stress is much lower than the yield strength limit of the corresponding material. The frequency shift caused by the thermal expansion is calculated as well, which is within the scope of the tuning range.
Conclusion
The coupled analyses based on the ANSYS software package are presented to design and optimize the cooling scheme of the accelerating structure. The von Mises stresses are much lower than the yield strength limit of the material. The calculation results indicate that our cooling scheme can deal with the dissipated RF power efficiently.
Similar content being viewed by others
Change history
13 March 2018
The original version of these four articles as below unfortunately contained a mistake. The category “Review” was incorrect. The correct category is “Original Paper”.
References
A.A. Bryazgin, V.I. Bezuglov, E.N. Kokin et al., ILU-14 industrial electron linear accelerator with a modular structure. Instrum. Exp. Tech. 54(3), 295–311 (2011)
S.X. Zheng, C.X. Tang, Y.Z. Lin et al., Development of high power irradiating accelerator. Chin. Phys. C 32(S1), 226–228 (2008). (in Chinese)
R.B. Miller, G. Loda, R.C. Miller et al., A high-power electron linear accelerator for food irradiation applications. Nucl. Instrum. Methods Phys. Res. Sect. B 211(4), 562–570 (2003)
X.T. Zhang, J.R. Zhang, S.L. Pei, G. Shu, Study of accelerator structure for high average beam power irradiation linac. At. Energy Sci. Technol. 51(8), 1515–1520 (2017). (in Chinese)
J. St Aubin, S. Steciw, B.G. Fallone, The design of a simulated in-line side-coupled 6 MV linear accelerator waveguide. Med. Phys. 37(2), 466–476 (2010)
J. Shao, Y. Du, H. Zha et al., Development of a C-band 6 MeV standing-wave linear accelerator. Phys. Rev. Spec. Top. Accel. Beams 16(9), 90–103 (2014)
ANSYS, Inc. Canonsburg, Pennsylvania, USA. http://www.ansys.com
N. Hartman, R.A. Rimmer, in Electromagnetic, thermal, and structural analysis of RF cavities using ANSYS. Particle Accelerator Conference, 2001. PAC, Proceedings of the 2001. IEEE 2001 vol. 2, p. 912–914
R. Losito, S. Marque, in Coupled Analysis of Electromagnetic, Thermo-mechanical Effects on RF Accelerating Structures. Proceedings of EPAC2002, Paris, France (2002)
Microwave Studio, Computer Simulation Technology, Darmstadt, Germany. www.cst.com
H.C. Liu, J. Peng, Y.F. Ruan et al., Thermal analysis for the high duty cycle PIMS accelerator. Chin. Phys. C 34(7), 1005–1008 (2010)
S.V. Kutsaev, B. Mustapha, P.N. Ostroumov et al., Design and multiphysics analysis of a 176 MHz continuous-wave radio-frequency quadrupole. Phys. Rev. Spec. Top. Accel. Beams 17(7), 072001 (2014)
V. Pettinacci, D. Alesini, L. Pellegrino et al., in Thermal-Mechanical Analysis of the RF Structures for the ELI-NP Proposal. Proceedings of IPAC2014, Dresden, Germany (2014)
H.C. Liu, H.F. Ouyang, Thermal analysis and water-cooling design of the CSNS MEBT 324 MHz buncher cavity. Chin. Phys. C 32(4), 280–284 (2008)
S. Pei, H. Ouyang, J. Zhang et al., in 325 MHz CW Room Temperature High Power Bunching Cavity For The China ADS MEBT1. Proceedings of IPAC2012, THPB025, Tel-Aviv, Israel (2012)
Author information
Authors and Affiliations
Corresponding author
Additional information
A correction to this article is available online at https://doi.org/10.1007/s41605-018-0036-4.
Rights and permissions
About this article
Cite this article
Shu, G., Zhang, JR., Zhang, XT. et al. Multi-physics analysis of a 325 MHz bi-periodic on-axis coupled accelerating structure. Radiat Detect Technol Methods 1, 20 (2017). https://doi.org/10.1007/s41605-017-0021-3
Received:
Revised:
Accepted:
Published:
DOI: https://doi.org/10.1007/s41605-017-0021-3