BEPCⅡ Linac Upgrade and Beam Commissioning

WANG Shu-Hong; PEI Guo-Xi; SUN Yao-Lin; CHI Yun-Long; CHEN Yan-Wei; CAO Jian-She; KONG Xiang-Cheng; ZHAO Feng-Li; HOU Mi; DENG Bing-Lin

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《中国物理C》（英文）编辑部

2024年10月30日

Chinese Physics C> 2006, Vol. 30> Issue(S1) : 150-152

BEPCⅡ Linac Upgrade and Beam Commissioning

Institute of High Energy Physics, CAS, Beijing 100049, China

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Abstract：
The BEPCⅡ injector linac upgrade aims at having higher beam energy with smaller beam emittance and energy spread to meet the colliding luminosity upgrade by two orders of magnitudes higher. It is a great challenge to various systems and the beam physics for this injector linac. This paper describes the constructions of the new electron gun, the new positron source, the new RF power supply, the new phasing system and the upgraded beam instrumentation, which are immediately affected on the beam performance. The beam physics with high current and small emittance and energy spread are systematically studied. The preliminary beam commissioning results and the further machine improvement plans are presented.

References

[1]	. PEI Guo-Xi, WANG Shu-Hong, CHI Yun-Long et al. Con-cept Design of the BEPC/Injector Linac, IHEP-BEPC/-SB-03-2, IHEP, November 2003(in Chinese)(裴国玺，王书鸿，池云龙等.BEPC II直线加速器初步设计，IHEP-BEPC II-SB-03-2，中国科学院高能物理研究所，2003年11月)

[1]	ZHAO Xiao-Yan , CAO Jian-She , WANG Lin , YUE Jun-Hui , YE Qiang , SUI Yan-Feng , ZHAO Ying , MA Hui-Zhou , ZHAO Jing-Xia , ZHANG Guo-Qing , ZHAO Zheng , Zhang Lei . Beam Loss Monitoring System of BEPCⅡ and Its First Application. Chinese Physics C, 2008, 32(S1): 80-82.
[2]	SUN Yi , WANG Guang-Wei , PAN Wei-Min , LI Zhong-Quan , HUANG Hong , MA Qiang , LIN Hai-Ying , XU Bo , WANG Qun-Yao , LI Shao-Peng , HE Kun , LIU Ya-Ping . First Superconducting RF System Commissioning for BEPCⅡ in China. Chinese Physics C, 2008, 32(S1): 191-193.
[3]	LI Tie-Hui , WU Jing-Min , CHEN Zhi-Xing , YU Jie . Radiation Dose Monitoring and Analysis for the Construction of the UpgradedBeijing Electron-Positron Collider (BEPCⅡ) During Its Storage Ring Operation. Chinese Physics C, 2008, 32(S1): 112-114.
[4]	SUN Bao-Gen , LUO Qing , WANG Xiao-Hui . Recent Developments of Beam Diagnostics. Chinese Physics C, 2008, 32(S1): 145-147.
[5]	LIU Wei-Bin , WANG Shu-Hong , YE Qiang , WANG Lin . Emittance Measurement at BEPCⅡ Linac. Chinese Physics C, 2008, 32(S1): 86-88.
[6]	WANG Shu-Hong , PEI Guo-Xi , CHI Yun-Long , CHEN Yan-Wei , CAO Jian-She , KONG Xiang-Cheng , ZHAO Feng-Li , HOM Mi , CHEN Zhi-Bi , LIU Wei-Bin , DENG Bing-Lin , GENG Zhe-Qiao , PEI Shi-Lun , SHEN Li , LE Qi , YE Qiang . BEPCⅡ Linac Beam Commissioning and Operation. Chinese Physics C, 2008, 32(S1): 215-217.
[7]	HOU Mi , GENG Zhe-Qiao . Construction of the Phasing System for BEPCⅡ Linac. Chinese Physics C, 2007, 31(4): 391-394.
[8]	WANG Shu-Hong , PEI Guo-Xi , LIU Wei-Bin , CHEN Yan-Wei , YE Qiang , GENG Zhe-Qiao . Studies on the Beam Orbit and Energy Instabilities at the BEPCⅡ Linac. Chinese Physics C, 2007, 31(11): 1067-1070.
[9]	PEI Shi-Lun , WANG Shu-Hong . Transient Beam Loading Effects on Standing Wave Cavities in Linear Accelerators. Chinese Physics C, 2006, 30(5): 454-461.
[10]	GEN Zhe-Qiao , HOU Mi , PEI Guo-Xi . PAD Design for the Phasing System of BEPCⅡ Linac. Chinese Physics C, 2006, 30(2): 151-154.
[11]	ZHAO Feng-Li , HOU Mi , ZHAO Yan-Ping , LIU Jin-Tong , ZHANG Jing-Ru , ZHOU Yao-Xiang , HAN Da-Wei . Microwave System for BEPCⅡ-Linac. Chinese Physics C, 2006, 30(2): 155-158.
[12]	CHEN Yan-Wei , WANG Shu-Hong , PEI Guo-Xi , LIU Wei-Bin , YE Qiang . Beam Commissioning of BEPCII Injector Linac. Chinese Physics C, 2006, 30(6): 562-565.
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WANG Shu-Hong, PEI Guo-Xi, SUN Yao-Lin, CHI Yun-Long, CHEN Yan-Wei, CAO Jian-She, KONG Xiang-Cheng, ZHAO Feng-Li, HOU Mi and DENG Bing-Lin. BEPCⅡ Linac Upgrade and Beam Commissioning[J]. Chinese Physics C, 2006, 30(S1): 150-152.

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Received: 2005-12-07
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

BEPCⅡ Linac Upgrade and Beam Commissioning

Corresponding author: WANG Shu-Hong,

Institute of High Energy Physics, CAS, Beijing 100049, China

Received Date: 2005-12-07
Accepted Date: 1900-01-01
Available Online: 2006-01-04

Abstract: The BEPCⅡ injector linac upgrade aims at having higher beam energy with smaller beam emittance and energy spread to meet the colliding luminosity upgrade by two orders of magnitudes higher. It is a great challenge to various systems and the beam physics for this injector linac. This paper describes the constructions of the new electron gun, the new positron source, the new RF power supply, the new phasing system and the upgraded beam instrumentation, which are immediately affected on the beam performance. The beam physics with high current and small emittance and energy spread are systematically studied. The preliminary beam commissioning results and the further machine improvement plans are presented.