Cavity beam position monitor  design optimization and offline test for BEPCII

Zhou Jiashen; He Jun; Du Yaoyao; Zhao Jingxia; Wang Xujian; Wang Anxin; Sui Yanfeng; Yue Junhui; Cao Jianshe

doi:10.11884/HPLPB202032.200158

Volume 32 Issue 10

Sep. 2020

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Article Navigation > High Power Laser and Particle Beams > 2020 > 32(10): 104001

Zhou Jiashen, He Jun, Du Yaoyao, et al. Cavity beam position monitor design optimization and offline test for BEPCII[J]. High Power Laser and Particle Beams, 2020, 32: 104001. doi: 10.11884/HPLPB202032.200158

Citation:

Zhou Jiashen, He Jun, Du Yaoyao, et al. Cavity beam position monitor design optimization and offline test for BEPCII[J]. High Power Laser and Particle Beams, 2020, 32: 104001. doi: 10.11884/HPLPB202032.200158

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Cavity beam position monitor design optimization and offline test for BEPCII

doi: 10.11884/HPLPB202032.200158

Zhou Jiashen^{1, 2
,},
He Jun¹,
Du Yaoyao¹,
Zhao Jingxia¹,
Wang Xujian¹,
Wang Anxin^{1, 3},
Sui Yanfeng^{1, 2},
Yue Junhui^{1, 2},
Cao Jianshe^{1, 2
,
,}

1.
Institute of High Energy Physics, Beijing 100049, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China
3.
Spallation Neutron Source Science Center, Dongguan 523803, China

Received Date: 2020-06-09
Rev Recd Date: 2020-08-25
Publish Date: 2020-09-29

Abstract

Abstract

In BEPCⅡ, button BPM and stripline BPM cannot reach sufficient precise resolution for beam transverse displacement. This project aims at the design of cavity BPM for BEPCⅡ linac. Position cavity in cavity beam position monitor (CBPM) is an re-entrant resonator with four rectangular waveguides. TM₁₁₀ mode frequency is chosen in S band, and the radius of beam pipe is 23 mm. TM₀₁₀ mode in reference cavity is almost as same as TM₁₁₀ mode in position cavity. According to the results of offline test, characterized parameters of CBPM coincided with computer simulated data. The frquency of TM₁₁₀ mode are 2502 MHz in horizontal direction and 2503 MHz in vertical direction. Cross-talk isolation for position cavity is better than −44.7 dB. Ratio front circuits included filtration, amplification and down-convertion when signals extracted from CBPM. Offline caliberation test results showed that CBPM has excellent measurement value of linearity area, which is over 10 mm. After frequency spectrum analysis and linear fitting, the position resolution of CBPM is 2.87 μm in horizontal direction and 2.16 μm in vertical direction.
- BEPCⅡ,
- cavity beam position monitor,
- TM₁₁₀,
- cross-talk isolation,
- position resolution

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References(13)

References

[1]	Inoue Y, Hayano H, Honda Y, et al. Development of a high-resolution cavity-beam position monitor[J]. Physical Review Special Topics - Accelerators and Beams, 2008, 11: 062801. doi: 10.1103/PhysRevSTAB.11.062801
[2]	Lorenz R. Cavity beam position monitors[C]//AIP Conference Proceedings. 1999: 53-73.
[3]	Wiedemann H. Particle accelerator physics[M]. USA: Springer, 2007.
[4]	Jackson J. Classical electrodynamics[M]. John Wiley & Sons. 2007.
[5]	Pozar D M. Microwave engineering (Third edition)[M]. Publishing House of Electronics Industry. 2010.
[6]	Lorenz R, Sabah S, et al. Cavity-type beam position monitors for the SASE FEL at the TESLA Test Facility[R]. CM-P00042566, 2003.
[7]	Luo Qing, Sun Baogen. Design of S-band re-entrant cavity BPM[J]. Nuclear Science and Techniques, 2009, 20(3): 133-139.
[8]	Sargsyan V. Cross-talk problem in pillbox cavity[R]. Technische Universitat Berlin and DESY-Zeuthen, TESLA 2003-01.
[9]	Chen Xiangcheng. History of cavity beam position monitors[R]. GSI-Report-2014-3.
[10]	Zhou Jiashen, Cao Jianshe, Sui Yanfeng, et al. Design and simulation of cavity BPM for BEPCII[J]. Radiation Detection Technology and Methods, 2019, 3(3): 1-6.
[11]	Dassault System. CST Studio Instruction Book[EB/OL]. https://www.3ds.com/products-services/simulia/products/cst-studio-suite/solvers/.
[12]	ROHDE & SCHWARZ R&B ZNB4 Introduction[EB/OL]. https://www.rohde-schwarz.com.cn/product/znb-productstartpage_63493-11648.html.
[13]	Teledyne LeCroy WavePro 760Zi-A Introduction[EB/OL]. http://www.teledynelecroy.com.cn/product/proDetail_29.html.