Beam-based calibrations of the BPM offset at C-ADS Injector Ⅱ

Wei-Long Chen; Zhi-Jun Wang; Chi Feng; Wei-Ping Dou; Yue Tao; Huan Jia; Wang-Sheng Wang; Shu-Hui Liu; Yuan He

doi:10.1088/1674-1137/40/7/077003

Chinese Physics C> 2016, Vol. 40> Issue(7) : 077003 DOI: 10.1088/1674-1137/40/7/077003

Beam-based calibrations of the BPM offset at C-ADS Injector Ⅱ

Wei-Long Chen ^1,2 ,
Zhi-Jun Wang ¹ ,
Chi Feng ¹ ,
Wei-Ping Dou ¹ ,
Yue Tao ^1,2 ,
Huan Jia ^1,2 ,
Wang-Sheng Wang ¹ ,
Shu-Hui Liu ¹ ,
Yuan He ^1,,

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Abstract：
Beam-based BPM offset calibration was carried out for Injector Ⅱ at the C-ADS demonstration facility at the Institute of Modern Physics (IMP), Chinese Academy of Science (CAS). By using the steering coils integrated in the quadrupoles, the beam orbit can be effectively adjusted and BPM positions recorded at the Medium Energy Beam Transport of the Injector Ⅱ Linac. The studies were done with a 2 mA, 2.1 MeV proton beam in pulsed mode. During the studies, the "null comparison method" was applied for the calibration. This method is less sensitive to errors compared with the traditional transmission matrix method. In addition, the quadrupole magnet's center can also be calibrated with this method.
- ADS Injector II ,
- beam commissioning ,
- BPM offset calibration ,
- null comparison method

References

[1]	P. Emma, Beam Based Alignment of Sector-1 of the SLC Linac, SLAC-PUB-5787, March 1992
[2]	W. J. Corbett, M. J. Lee, V. Ziemann, A Fast Model-Calibration Procedure for Storage Rings, SLAC-PUB-6112, May 1993
[3]	T. Honda, T. Obina, T. Miyajima et al, Beam Based Aligement of BPM and Orbit Stabilization at the Photon Factory Storage Ring, Proceedings of the 2001 Particle Accelerator Conference, Chicago, 2001
[4]	S. Sasaki, K. Soutome, H. Tanaka, Beam Based Calibration of BPM Position Sensitivity at Spring-8 Storage Ring, AIP Conference Proceedings, 648:425(2002)
[5]	Zhang CaiXia, Liu Weibin, Ye Qiang, Atomic Energy, 44(2). Feb. (2010)
[6]	J.Y. Huang, D.H. Jung, K.H. Kim et al, Beam-based offset calibration of the PLS BPM, IEEE 2:2107-2109(1997)
[7]	WANG Zhi-Jun, HE Yuan, WANG Wang-Sheng et al, Chin. Phys. C, 37(4):047003(2013)
[8]	J. Wang, J.L, Huang, Y. He et al, Phys. C, 38(10):107005(2014)
[9]	Zhang Yong, Wu Jun-Xia, Zhu Guang-Yu et al, Capacitive Beam Position Monitors for the Low- Beam of the Chinese ADS Proton Linac, Chin. Phys. C, to be published
[10]	Jia Huan, He Yuan, Song Ming-Tao et al, Chin. Phys. C, 39(10):107003(2015)

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Wei-Long Chen, Zhi-Jun Wang, Chi Feng, Wei-Ping Dou, Yue Tao, Huan Jia, Wang-Sheng Wang, Shu-Hui Liu and Yuan He. Beam-based calibrations of the BPM offset at C-ADS Injector Ⅱ[J]. Chinese Physics C, 2016, 40(7): 077003. doi: 10.1088/1674-1137/40/7/077003

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Received: 2015-09-09

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Supported by National Natural Science Foundation of China (91426303, 11525523)

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Beam-based calibrations of the BPM offset at C-ADS Injector Ⅱ

Corresponding author: Yuan He,

Received Date: 2015-09-09
Available Online: 2016-07-05

Fund Project: Supported by National Natural Science Foundation of China (91426303, 11525523)

Abstract: Beam-based BPM offset calibration was carried out for Injector Ⅱ at the C-ADS demonstration facility at the Institute of Modern Physics (IMP), Chinese Academy of Science (CAS). By using the steering coils integrated in the quadrupoles, the beam orbit can be effectively adjusted and BPM positions recorded at the Medium Energy Beam Transport of the Injector Ⅱ Linac. The studies were done with a 2 mA, 2.1 MeV proton beam in pulsed mode. During the studies, the "null comparison method" was applied for the calibration. This method is less sensitive to errors compared with the traditional transmission matrix method. In addition, the quadrupole magnet's center can also be calibrated with this method.