JLab Hall-A上CSR实验的铅玻璃量能器刻度与效率分析

doi:10.3969/j.issn.0253-2778.2014.03.009

中国科学技术大学学报 ›› 2014, Vol. 44 ›› Issue (3): 217-220.DOI: 10.3969/j.issn.0253-2778.2014.03.009

• 论著 • 上一篇

JLab Hall-A上CSR实验的铅玻璃量能器刻度与效率分析

闫新虎，叶云秀，吕海江，蒋峰建，朱鹏佳，石瑛

1.黄山学院物理系，安徽黄山 245021；2.中国科学技术大学近代物理系,安徽合肥 230026

收稿日期:2013-03-06 修回日期:2013-06-10 接受日期:2013-06-10 出版日期:2013-06-10 发布日期:2013-06-10

Lead glass calorimeter calibration and efficiency analysis for Coulomb sum rule (CSR) experiment in JLab Hall-A

YAN Xinhu, YE Yunxiu, LYU Haijiang, JIANG Fengjian, ZHU Pengjia, SHI Ying

1.Department of Physics, Huangshan University, Huangshan 245041, China; 2.Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China

Received:2013-03-06 Revised:2013-06-10 Accepted:2013-06-10 Online:2013-06-10 Published:2013-06-10
Contact: YAN Xinhu
About author:YAN Xinhu (corresponding author), male, born in 1977, PhD. Research field: Medium energy nuclear physics.
Supported by:
Supported by the National Natural Science Foundation of China (11135002, 11275083) and Natural Science Foundation of Anhui Education Committee (KJ2012B179, KJ2011B164).

摘要/Abstract

摘要： JLab的A大厅里的高分辨谱仪安装了双层的铅玻璃量能器，用来做粒子鉴别分析.2008年初我们在美国的JLab获取了全部的CSR实验数据，这里采用了ROOT分析软件里的Fumili 拟合方法和准弹性散射数据对位于高分辨谱仪上的量能器进行刻度. 因为实验过程中硬件高压设置的变化, 需要对CSR实验数据进行不同的对应的刻度. 刻度结果表明此刻度修正是合适的. 散射电子动量为1 GeV时, 铅玻璃量能器对该能量粒子的最好分辨率为0048 GeV.电子效率和pion介子拒绝度可以分别达到993%和998%.

关键词: 铅玻璃量能器, 分辨率, 刻度, 截断效率

Abstract: Two layers of lead glass calorimeter are installed for additional PID analyses in each high resolution spectrometer (HRS) at Hall-A in Jefferson Lab (JLab). The Fumili minimization method of ROOT analysis software and quasi-elastic data of CSR experiment conducted by the authors in the early year of 2008 at JLab were used in the calibration of the calorimeter detector on HRS for the data analysis of CSR experiment. Since some high voltage changes in hardware settings, the lead glass calorimeter detector needed to be calibrated correspondingly. The calibration results are reasonable after this procedure. The best resolution of the calorimeter for the scattering electron was about 0048 GeV when its momentum was at 10 GeV after calibration. Total electron efficiency and pion rejection can reach 993% and 998%, respectively.

Key words: lead glass calorimeter, resolution, calibration, cut efficiency

中图分类号:

闫新虎，叶云秀，吕海江，蒋峰建，朱鹏佳，石瑛. JLab Hall-A上CSR实验的铅玻璃量能器刻度与效率分析[J]. 中国科学技术大学学报, 2014, 44(3): 217-220.

YAN Xinhu, YE Yunxiu, LYU Haijiang, JIANG Fengjian, ZHU Pengjia, SHI Ying. Lead glass calorimeter calibration and efficiency analysis for Coulomb sum rule (CSR) experiment in JLab Hall-A[J]. Journal of University of Science and Technology of China, 2014, 44(3): 217-220.

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JLab Hall-A上CSR实验的铅玻璃量能器刻度与效率分析

Lead glass calorimeter calibration and efficiency analysis for Coulomb sum rule (CSR) experiment in JLab Hall-A

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