Theoretical analysis of BLM system for HLS Ⅱ

CHEN Yu-Kai; LI Yu-Xiong; LI Wei-Min; HE Li-Juan

doi:10.1088/1674-1137/39/1/017003

Chinese Physics C> 2015, Vol. 39> Issue(1) : 017003 DOI: 10.1088/1674-1137/39/1/017003

Theoretical analysis of BLM system for HLS Ⅱ

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Abstract：
Hefei Light Source (HLS) is being upgraded to HLS Ⅱ. Its emittance will be much lower than before, therefore the Touschek scattering will increase significantly and become the dominant factor of beam loss. So it is necessary to build a new beam loss monitoring (BLM) system that, in contrast to the old one, is able to obtain the quantity and position information of lost electrons. This information is useful in the commissioning, troubleshooting, and beam lifetime studying for HLS Ⅱ. This paper analyzes the distribution features of different kinds of lost electrons, introduces the operation parameters of the new machine and discusses how to choose proper monitoring positions. Based on these comprehensive analyses, a new BLM system for HLS Ⅱ is proposed.

References

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Bialowons W, Ridoutt F, Wittenburg K. Electron Beam Loss Monitors for HERA. in Fourth European Particle Accelerator Conference (EPAC94). World Scientific. 1994. 1628[2] LI Yu-Xiong et al. The Beam Loss Monitoring System for HLS Storage Ring. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2001, 467: 80-83[3] CUI Yong-Gang et al. Nuclear Techniques, 2002, 25(2): 95-98[4] CUI Yong-Gang et al. Nuclear Electronics and Detection Technology, 2002, 22(1): 72-77[5] ZHAO Xiao-Yan et al. Chinese Physics C (HEP NP), 2008, 32(3): 80-82[6] CAI Jun et al. Nuclear Science and Techniques, 2011, 22: 5-8[7] LI Yu-Xiong et al. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2003, 505(1): 366-369[8] LI Yu-Xiong et al. A New Tool for Beam-Life Research at HLS Storage Ring. Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the. Vol. 4. IEEE, 2003[9] Le Duff. Single and Multiple Touschek Effects. in Proc. of the CERN Acc. School, Berlin 1989, CERN 89-01. 114-130

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CHEN Yu-Kai, LI Yu-Xiong, LI Wei-Min and HE Li-Juan. Theoretical analysis of BLM system for HLS Ⅱ[J]. Chinese Physics C, 2015, 39(1): 017003. doi: 10.1088/1674-1137/39/1/017003

CHEN Yu-Kai, LI Yu-Xiong, LI Wei-Min and HE Li-Juan. Theoretical analysis of BLM system for HLS Ⅱ[J]. Chinese Physics C, 2015, 39(1): 017003. doi: 10.1088/1674-1137/39/1/017003 shu

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Received: 2014-01-22
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Theoretical analysis of BLM system for HLS Ⅱ

Corresponding author: CHEN Yu-Kai,

Corresponding author: LI Yu-Xiong,

Received Date: 2014-01-22
Accepted Date: 1900-01-01
Available Online: 2015-01-05

Abstract: Hefei Light Source (HLS) is being upgraded to HLS Ⅱ. Its emittance will be much lower than before, therefore the Touschek scattering will increase significantly and become the dominant factor of beam loss. So it is necessary to build a new beam loss monitoring (BLM) system that, in contrast to the old one, is able to obtain the quantity and position information of lost electrons. This information is useful in the commissioning, troubleshooting, and beam lifetime studying for HLS Ⅱ. This paper analyzes the distribution features of different kinds of lost electrons, introduces the operation parameters of the new machine and discusses how to choose proper monitoring positions. Based on these comprehensive analyses, a new BLM system for HLS Ⅱ is proposed.