WANG Geng, YANG Jiancheng, XIA Jiawen. Closed Orbit Correction for the Isochronous Mode of Spectrometer Ring[J]. Nuclear Physics Review, 2019, 36(4): 419-425. doi: 10.11804/NuclPhysRev.36.04.419
Citation:
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WANG Geng, YANG Jiancheng, XIA Jiawen. Closed Orbit Correction for the Isochronous Mode of Spectrometer Ring[J]. Nuclear Physics Review, 2019, 36(4): 419-425. doi: 10.11804/NuclPhysRev.36.04.419
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Closed Orbit Correction for the Isochronous Mode of Spectrometer Ring
- 1.
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;
- 2.
University of Chinese Academy of Sciences, Beijing 100049, China
Funds:
National Nature Science Foundation of China (11375243);Guangdong Innovative and Entepreneurial Research Team Program (2016ZT06G373)
- Received Date: 2019-03-21
- Rev Recd Date:
2019-05-27
- Publish Date:
2019-12-20
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Abstract
The Spectrometer Ring (SRing), which is an important component of the High Intensity heavy-ion Accelerator Facility (HIAF), has to be optimized for the closed orbit correction system. Since the maximum horizontal β function of the isochronous mode (γt=1.43) is very large, the field imperfections and alignment deviations of the magnets will cause large closed orbit distortion (COD), which will result in the distortions of linear optics. Therefore, the closed orbit correction is critical to the operation of SRing. In the simulations, the Singular Value Decomposition (SVD) algorithm is adopted. The repeated correction method is applied and the response matrices are multi-calculated before each correction. The influences of BPM reading errors are analyzed. In addition, the effects of reduced singular values are analytically expressed and simulated. As a result, the closed orbits are corrected to be less than 0.8 mm, and the linear optics is also well optimized.
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References
[1]
|
YANG J C, XIA J W, XIAO G Q, et al. Nucl Instr and Meth B, 2013, 317:263. |
[2]
|
WU B, YANG J C, XIA J W, et al. Nucl Instr and Meth A, 2018, 881:27. |
[3]
|
WU Bo, YANG Jiancheng, GE Wenwen, et al. Nuclear Physics Review, 2018, 35(3):270.(in Chinese)(吴波,杨建成,葛文文,等.原子核物理评论, 2018, 35(3):270.) |
[4]
|
GAO Xiang, YANG Jiancheng, XIA Jiawen, et al. High Power Laser and Particle Beams, 2014, 26(5):055101.(in Chinese)(高翔,杨建成,夏佳文,等.强激光与粒子束, 2014, 26(5):055101.) |
[5]
|
HAUSMANN M, ATTALLAH F, BECKERT K, et al. Nucl Instr and Meth A, 2000, 446(3):569. |
[6]
|
GE Wenwen, YUAN Youjin, YANG Jiancheng, et al. Nuclear Physics Review, 2018, 35(2):147.(in Chinese)(葛文文,原有进,杨建成,等.原子核物理评论, 2018, 35(2):147.) |
[7]
|
DOLINSKII A, LITVINOV S, STECK M, et al. Nucl Instr and Meth A, 2007, 574:207. |
[8]
|
WALL E W, RECHTSTEINER A, ROCHA M L. A Practical Approach to Microarray Data Analysis[M], New York:Springer, 2003:91. |
[9]
|
DINEV D. Physics of Particles and Nuclei, 1997, 28(4):398. |
[10]
|
The MAD-8 code. Available on the web http://cern.ch/mad8. |
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Proportional views
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