Progress of the Injector Linac Upgrade for the BEPCⅡ Project

PEI Guo-Xi; SUN Yao-Lin; CHI Yun-Long; WANG Shu-Hong

Chinese Physics C> 2004, Vol. 28> Issue(11) : 1214-1218

Progress of the Injector Linac Upgrade for the BEPCⅡ Project

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

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Abstract：
BEPCⅡ—an upgrade project of Beijing Electron Positron Collider (BEPC) is a factory type of e+e- collider. It requires its injector linac to have a higher beam energy (1.89 GeV) for on-energy injection and a higher beam current (40 mA e+ beam) for a higher injection rate ( 50 mA/min). The low beam emittance (1.6π mm·mrad for e+ beam, and 0.2πmm·mrad for 300 mA e- beam) and the low beam energy spread (±0.5%) are also required to meet the storage ring acceptance. Thus the original BEPC injector linac must be upgraded to have a new electron gun with its complete tuning system, a new positron source with a flux concentrator, a new RF power system with its phasing loops and a new beam tuning system with orbit correction and optics tuning devices. These new components have been designed, fabricated, tested and will be installed in their final positions in this spring and summer, which are described in this paper.

References

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[1]	MI Zheng-Hui , SUN Yi , PAN Wei-Min , WANG Guang-Wei , LI Zhong-Quan , DAI Jian-Ping , MA Qiang , LIN Hai-Ying , XU Bo , HUANG Hong , WANG Qun-Yao , XU Yu-Fen , ZHAO Guang-Yuan , HUANG Tong-Ming , SHA Peng , ZHANG Xin-Ying , MENG Fan-Bo , LI Han , CHEN Xu , ZHAO Dan-Yang , ZHANG Juan , PENG Ying-Hua . A tuning system for BEPCⅡ. Chinese Physics C, 2013, 37(8): 087003. doi: 10.1088/1674-1137/37/8/087003
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PEI Guo-Xi, SUN Yao-Lin, CHI Yun-Long and WANG Shu-Hong. Progress of the Injector Linac Upgrade for the BEPCⅡ Project[J]. Chinese Physics C, 2004, 28(11): 1214-1218.

PEI Guo-Xi, SUN Yao-Lin, CHI Yun-Long and WANG Shu-Hong. Progress of the Injector Linac Upgrade for the BEPCⅡ Project[J]. Chinese Physics C, 2004, 28(11): 1214-1218. shu

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Received: 2004-03-30
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Progress of the Injector Linac Upgrade for the BEPCⅡ Project

Corresponding author: WANG Shu-Hong,

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

Received Date: 2004-03-30

Accepted Date: 1900-01-01

Available Online: 2004-11-05

Abstract: BEPCⅡ—an upgrade project of Beijing Electron Positron Collider (BEPC) is a factory type of e+e- collider. It requires its injector linac to have a higher beam energy (1.89 GeV) for on-energy injection and a higher beam current (40 mA e+ beam) for a higher injection rate ( 50 mA/min). The low beam emittance (1.6π mm·mrad for e+ beam, and 0.2πmm·mrad for 300 mA e- beam) and the low beam energy spread (±0.5%) are also required to meet the storage ring acceptance. Thus the original BEPC injector linac must be upgraded to have a new electron gun with its complete tuning system, a new positron source with a flux concentrator, a new RF power system with its phasing loops and a new beam tuning system with orbit correction and optics tuning devices. These new components have been designed, fabricated, tested and will be installed in their final positions in this spring and summer, which are described in this paper.

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Progress of the Injector Linac Upgrade for the BEPCⅡ Project

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