Chinese Physics C > 2011, Vol. 35 > Issue(1): 1-5 DOI: 10.1088/1674-1137/35/1/001

Luminosity monitoring and calibration of BLM

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Abstract：
The BEPCⅡ Luminosity Monitor (BLM) monitors relative luminosity per bunch. The counting rates of gamma photons, which are proportional to the luminosities from the BLM at the center of mass system energy of the ψ(3770) resonance, are obtained with a statistical error of 0.01% and a systematic error of 4.1%. Absolute luminosities are also determined by the BESⅢ End-cap Electro-Magnetic Calorimeter (EEMC) using Bhabha events with a statistical error of 2.3% and a systematic error of 3.5%. The calibration constant between the luminosities obtained with the EEMC and the counting rates of the BLM are found to be 0.84±0.03 (×10 ²⁶cm ^-2·count ^-1). With the calibration constant, the counting rates of the BLM can be scaled up to absolute luminosities.

References

[1]

XUE Zhen et al. Chinese Physics C, 2010, 34(4): 487-4912 XUE Zhen et al. Nuclear Electronics Detection Technology, 2007，27(1): 126-129 (in Chinese)3 SHAN Qing et al. Journal of Univ. of Science and Technology of China, 2008, 38(11): 1241-1245 (in Chinese)4 Altarelli G, Buccella F. Il Nuovo Cimento, 1964, ⅩⅩⅩⅣ (5): 1337-13465 WANG Jiu-Qing. Status of BEPCⅡ, the BESⅢ Collaboration Summer 2009 Meeting6 WANG Zhi-Yong et al. Measurement of Integrated Luminosity in R Scan. HEPNP, 2001，25(2): 89-94 (in Chinese)7 PING Rong-Gang. Chinese Physics C (HEPNP), 2008, 32(8): 599-6028 Jadach S, Placzek W, Ward B F L. Phys. Lett. B, 1997, 390: 298-3089 XU H. Overview of trigger efficiency study, the BESⅢ Collaboration Winter 2009 Meeting

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[2]	CHEN Yu-Kai,LI Yu-Xiong,LI Wei-Min,HE Li-Juan. Theoretical analysis of BLM system for HLS Ⅱ. Chinese Physics C, 2015, 39(1): 017003.doi:10.1088/1674-1137/39/1/017003
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[5]	WANG Bo-Qun,MO Xiao-Hu. Analytical determination of optimal luminosity forτmass scan. Chinese Physics C, 2013, 37(2): 026202.doi:10.1088/1674-1137/37/2/026202
[6]	ZHENG Chuan,XU Hu-Shan,YUAN Xiao-Hua. Luminosity determination for the pd reaction at 2.14 GeV with WASA-at-COSY. Chinese Physics C, 2012, 36(7): 605-609.doi:10.1088/1674-1137/36/7/007
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[11]	BIAN Jian-Ming,HE Kang-Lin,LI Wei-Guo,HU Tao,FU Cheng-Dong,HUANG Bin,LIU Ying,NING Fei-Peng,SONG Wen-Bo,SUN Sheng-Sen,XU Min,YAN Jie,YAN Liang,. Absolute photon energy calibration for the BESⅢ EMC. Chinese Physics C, 2010, 34(1): 72-77.doi:10.1088/1674-1137/34/1/013
[12]	HAN Yun-Cheng,Nobuyuki Chiga,Yu Fujii,Kenta Futatsukawa,Osamu Hashimoto,Kentaro Hirose,Takatsugu Ishikawa,Hiroki Kanda,Masashi Kaneta,Daisuke Kawama,Yue Ma,Kazushige Maeda,Tomofumi Maruta,Nayuta Maruyama,Akihiko Matsumura,Youhei Miyagi,Koji Miwa,Satoshi N,Hajime Shimizu,Koutarou Shirotori,Koutaku Suzuki,Tadaaki Tamae,Hirokazu Tamura,Kyo Tsukada,WANG Tie-Shan,Hirohito Yamazaki. Energy calibration of tagged photons by the d(γ, π^－pp) reaction. Chinese Physics C, 2010, 34(1): 35-38.doi:10.1088/1674-1137/34/1/006
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[14]	E. A. Kuraev,A. L. Sibidanov. Monte Carlo generator photon jets used for luminosity at e⁺e^－colliders. Chinese Physics C, 2010, 34(6): 877-882.doi:10.1088/1674-1137/34/6/044
[15]	Carloni Calame. Status and accuracy of the Monte Carlo generators for luminosity measurements. Chinese Physics C, 2010, 34(6): 883-888.doi:10.1088/1674-1137/34/6/045
[16]	LI Shu-Wei,WANG Yi,LI Jin,LI Yuan-Jing,KANG Ke-Jun,LIN De-Xu,ZHANG Qing-Jun. Monitoring the energy variation of an electron linac using a Cerenkov detector. Chinese Physics C, 2010, 34(1): 126-130.doi:10.1088/1674-1137/34/1/023
[17]	XUE Zhen,SHAN Qing,XU Zi-Zong,WANG Xiao-Lian,WU Jian,WANG Yong-Gang,ZHANG Tao,HU Tao,CAI Xiao,WANG Yi-Fang. A fast luminosity monitor for BEPCⅡ. Chinese Physics C, 2010, 34(4): 487-491.doi:10.1088/1674-1137/34/4/013
[18]	XU Mei-Hang,TIAN Jian-Min,CHEN Chang,CHEN Yuan-Bo,XU Tao-Guang,LU Shuang-Tong. Design and construction of the first prototype ionization chamber for CSNS and PA beam loss monitor (BLM) system. Chinese Physics C, 2009, 33(2): 123-126.doi:10.1088/1674-1137/33/2/010
[19]	YUAN Xiao-Hua,Dzyuba Alexey,scher Markus,for the,ANKE Collaboration. Luminosity determination for the dd→α K⁺K^－experiment at ANKE/COSY. Chinese Physics C, 2009, 33(1): 20-23.doi:10.1088/1674-1137/33/1/005
[20]	Ni Hutting,Zhou Haushi,Jiang Chunhua,Guo Hongfei,Xu Jiangou,Zhu Qiming,Wang Fang,Liu Wei,Li Jiahua. The Luminosity Monitor of Beijing Spectrometer (BES). Chinese Physics C, 1990, 14(S3): 237-248.

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XUE Zhen, XU Zi-Zong, WANG Xiao-Lian, HU Tao, WANG Zhi-Yong, FU Cheng-Dong, YAN Wen-Biao, ZHOU Li, CAI Xiao, YU Bo-Xiang, FANG Jian, SUN Xi-Lei, SHI Feng, WANG Zhi-Gang, AN Zheng-Hua, SUN Li-Jun, LIU Hong-Bang, ZHANG Ai-Wu, WANG Xiao-Dong and Luminosity monitoring and calibration of BLM[J]. Chinese Physics C, 2011, 35(1): 1-5. doi: 10.1088/1674-1137/35/1/001

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Received: 2010-04-23
Revised: 2010-05-18

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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

Luminosity monitoring and calibration of BLM

Received Date:2010-04-23

Accepted Date:2010-05-18

Available Online:2011-01-05

Abstract:The BEPCⅡ Luminosity Monitor (BLM) monitors relative luminosity per bunch. The counting rates of gamma photons, which are proportional to the luminosities from the BLM at the center of mass system energy of the ψ(3770) resonance, are obtained with a statistical error of 0.01% and a systematic error of 4.1%. Absolute luminosities are also determined by the BESⅢ End-cap Electro-Magnetic Calorimeter (EEMC) using Bhabha events with a statistical error of 2.3% and a systematic error of 3.5%. The calibration constant between the luminosities obtained with the EEMC and the counting rates of the BLM are found to be 0.84±0.03 (×10²⁶cm^-2·count^-1). With the calibration constant, the counting rates of the BLM can be scaled up to absolute luminosities.

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Luminosity monitoring and calibration of BLM

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Luminosity monitoring and calibration of BLM

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