ON THE AVERAGE LUMINOSITY OF ELECTRON POSITRON COLLIDER AND POSITRON-PRODUING ENERGY

XIE Jia-Lin

Chinese Physics C> 1985, Vol. 9> Issue(5) : 577-585

ON THE AVERAGE LUMINOSITY OF ELECTRON POSITRON COLLIDER AND POSITRON-PRODUING ENERGY

XIE Jia-Lin ^,

Institute of High Energy Physics, Academia Sinica

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In this paper, the average luminosity of linac injected electron positron collider is investigated from the positron-producing energy point of view. When the energy of the linac injector is fixed to be less than the operating energy of the storage ring, it has been found that there exists a positron-producing energy to give optimum average luminosity. Two cases have been studied, one for an ideal storage ring with no single-beam instability and the other for practical storage ring with fast head-tail instability. The result indicates that there is a positron-producing energy corresponding to the minimum injection time, but this does not correspond to the optimum average luminosity for the practical storage rings. For Beijing Electron Positron Collider (BEPC), the positron-producing energy corresponding to the optimum average luminosity is about one tenth of the total injector energy.

References

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[8]	Guo Zhiyuan , Qin Qing , Zhang Chuang . Study of Bunch Lengthening at BEPC. Chinese Physics C, 1996, 20(11): 1034-1040.
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[11]	CHEN Yu , DAI Chang-Jiang , GU Yi-Fan , LEI Zhuan-Heng , LI Jian-Ping , LIU Shu-Dong , SHAO Bei-Bei , TANG Yue-Li . Study on Background Radiation at Beijing Electron Positron Collider and Radiation Damage of High-Z Scintillation Crystals. Chinese Physics C, 1993, 17(8): 673-679.
[12]	LI Jian-Ping , TANG Yue-Li , LIU Shu-Dong , JIANG Wen-Gui , LEI Chuan-Heng , SHAO Bei-Bei , LI Tie-Hui , CAI Xiao-Ping , ZHANG Qing-Jiang . Measurement of Radiation Dose Level of Synchrotron Radiation Experimental Hall of BEPC. Chinese Physics C, 1992, 16(2): 105-112.
[13]	BES Collaboration . τ Mass Measurement at Beijing Electron Positron Collider (BEPC). Chinese Physics C, 1992, 16(10): 865-875.
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[16]	SHEN Ji-Qiang , LONG Qi-Wei , ZHOU Jin , WANG Ke-Lin . ATOMIC DENSITY DISTRIBUTIONS OF GRAIN BOUNDARIES IN METALS AND CHARACTERISTICS OF POSITRON ANNIHILATION LIFETIME SPECTRA. Chinese Physics C, 1989, 13(10): 879-885.
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[20]	YAN Tai-Xuan . DISCUSSION ON THE RELATIONSHIP BETWEEN THE FREQUENCIES OF INJECTOR LINAC AND e⁺e^－ STORAGE RING. Chinese Physics C, 1984, 8(3): 323-327.

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XIE Jia-Lin. ON THE AVERAGE LUMINOSITY OF ELECTRON POSITRON COLLIDER AND POSITRON-PRODUING ENERGY[J]. Chinese Physics C, 1985, 9(5): 577-585.

XIE Jia-Lin. ON THE AVERAGE LUMINOSITY OF ELECTRON POSITRON COLLIDER AND POSITRON-PRODUING ENERGY[J]. Chinese Physics C, 1985, 9(5): 577-585. shu

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Received: 1900-01-01
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

ON THE AVERAGE LUMINOSITY OF ELECTRON POSITRON COLLIDER AND POSITRON-PRODUING ENERGY

Corresponding author: XIE Jia-Lin,

Institute of High Energy Physics, Academia Sinica

Received Date: 1900-01-01

Accepted Date: 1900-01-01

Available Online: 1985-10-05

Abstract: In this paper, the average luminosity of linac injected electron positron collider is investigated from the positron-producing energy point of view. When the energy of the linac injector is fixed to be less than the operating energy of the storage ring, it has been found that there exists a positron-producing energy to give optimum average luminosity. Two cases have been studied, one for an ideal storage ring with no single-beam instability and the other for practical storage ring with fast head-tail instability. The result indicates that there is a positron-producing energy corresponding to the minimum injection time, but this does not correspond to the optimum average luminosity for the practical storage rings. For Beijing Electron Positron Collider (BEPC), the positron-producing energy corresponding to the optimum average luminosity is about one tenth of the total injector energy.

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ON THE AVERAGE LUMINOSITY OF ELECTRON POSITRON COLLIDER AND POSITRON-PRODUING ENERGY

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