摘要
简要地讨论了北京谱仪-Ⅱ(BES-Ⅱ)飞行时间计数器(TOF)数据的离 线刻度.利用J/φ能区的电子对事例仔细完成的离线刻度与校正结果表明,新的 TOF时间分辨达到σTOF=180ps.由此大大增强了对带电粒子的识别能力.对 于3σ的π/K分离其动量可以达到0.93GeV/c.
Data offline calibration and reconstruction for the BES- Ⅱ TOF system are reported in this paper. After applying calibration constants to correct the measured raw data, a the resolution of 180 ps is obtained for the new TOF system. The power of charged particle identification is improved. The momentum for the 3σπ/K separation goes up to 0. 93 GeV/c.
出处
《高能物理与核物理》
CSCD
北大核心
2001年第2期154-159,共6页
High Energy Physics and Nuclear Physics
基金
国家自然科学基金!(19991480
19825116)
中国科学院九五重大及特别支持项目!(KJ95T-03)资助
关键词
北京谱仪
飞行时间计数器
数据离线刻度
时间分辨本领
粒子识别
Beijing Spectrometer, time-of-flight countor
data offline calibration, time resolution, particle identification