Frequency tuning with RFQ temperature in China ADS Injector Ⅱ

Jing Wang; Jian-Long Huang; Xiao-Qi Zhang; Bin Zhang; Yuan He; Zhou-Li Zhang; Ai-Min Shi

doi:10.1088/1674-1137/40/3/037003

Chinese Physics C> 2016, Vol. 40> Issue(3) : 037003 DOI: 10.1088/1674-1137/40/3/037003

Frequency tuning with RFQ temperature in China ADS Injector Ⅱ

1.
Lanzhou University of Technology, Lanzhou 730000, China
2.
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
3.
Lanzhou University of Technology, Lanzhou 730000, China
4.
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China

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Abstract：
A 162.5 MHz four-vane radio frequency quadruple (RFQ) accelerator has been developed at the Institute of Modern Physics (IMP) for Injector II of the China ADS linac. The RFQ will operate in continuous wave mode at 100 kW. For the designed 10 mA beam, the additional RF power dissipation will induce a very large reflection of power. A water-temperature controlling system will be used to reduce the power reflection by tuning the frequency of the RFQ. The tuning capability of the water temperature is studied under different configurations of cooling water. Simulations and experiment are compared in this paper. The experimental results agree well with simulation using ANSYS. This can be used as a reference to tune the RFQ in beam commissioning.
- RFQ ,
- frequency tuning ,
- beam loading ,
- ADS ,
- multi-physics simulation

References

[1]	J. Y. Tang, P. Cheng, H. P. Geng, Conceptual Physics Design for the China-ADS LINAC, Proceedings of PAC2013, Pasadena, CA USA, THPSM04. 2013
[2]	Z. L. Zhang, Y. He, A. M. Shi, et al, Design of a four-vane RFQ for CHINA ADS project, Proceedings of LINAC 2012, Tel-Aviv, Israel. THPB039. 2012
[3]	H. Vernon Smith, Jr., T. L. Figueroa et al, Commissioning Results From the Low-energy Demonstration accelerator(LEDA) Radio-frequency Quadrupole(RFQ), Proceedings of EPAC 2000, Vienna, Austria
[4]	A. Ratti, J. Ayers, L. Doolittle et al, The SNS RFQ Commissioning. Proceedings of LINAC 2002,Gyeongju,Korea
[5]	H. F. Ouyang, Y. Yao, Thermal Analysis of CSNS RFQ. High Energy Physics and Nuclear Physics, 31(12): 1116-1121, 2007
[6]	ANSYS. Inc. Canonsburg, Pennsylvania, USA. www.ansys.com
[7]	J. Wang, J. L. Huang, Y. He, et al, Chinese Physics C, 38(10): 107005, 2014

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Jing Wang, Jian-Long Huang, Xiao-Qi Zhang, Bin Zhang, Yuan He, Zhou-Li Zhang and Ai-Min Shi. Frequency tuning with RFQ temperature in China ADS Injector Ⅱ[J]. Chinese Physics C, 2016, 40(3): 037003. doi: 10.1088/1674-1137/40/3/037003

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Received: 2015-06-09

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Supported by National Natural Science Foundation of China (91026001)

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

Frequency tuning with RFQ temperature in China ADS Injector Ⅱ

Corresponding author: Jing Wang,

1. Lanzhou University of Technology, Lanzhou 730000, China
2. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
3. Lanzhou University of Technology, Lanzhou 730000, China
4. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China

Received Date: 2015-06-09
Available Online: 2016-02-29

Fund Project: Supported by National Natural Science Foundation of China (91026001)

Abstract: A 162.5 MHz four-vane radio frequency quadruple (RFQ) accelerator has been developed at the Institute of Modern Physics (IMP) for Injector II of the China ADS linac. The RFQ will operate in continuous wave mode at 100 kW. For the designed 10 mA beam, the additional RF power dissipation will induce a very large reflection of power. A water-temperature controlling system will be used to reduce the power reflection by tuning the frequency of the RFQ. The tuning capability of the water temperature is studied under different configurations of cooling water. Simulations and experiment are compared in this paper. The experimental results agree well with simulation using ANSYS. This can be used as a reference to tune the RFQ in beam commissioning.