排序方式: 共有21条查询结果,搜索用时 15 毫秒
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言杰 孙胜森 李澄 何康林 安琪 边渐鸣 曹国富 曹学香 陈宏芳 邓子艳 封常青 傅成栋 何苗 衡月昆 黄彬 郭建华 贾卢魁 季晓斌 李卫东 梁羽铁 刘春秀 刘怀民 刘树彬 刘曙东 刘勇 罗涛 马秋梅 马想 毛泽普 莫晓虎 邱进发 邵明 孙晓东 孙勇杰 孙永昭 孙志嘉 田浩来 王纪科 文硕频 吴金杰 伍灵慧 吴智 谢宇广 徐敏 严亮 杨桂安 袁野 张长春 张建勇 张瑶 赵川 赵雷 朱永生 邹佳恒 《中国物理 C》2010,34(3):368-373
The principle of the method for the BESIII TOF calibration using cosmic ray data without magnetic field are reported in this paper. After applying calibration constants, the single-end readout time resolution could reach about 150 ps, and the time resolution for one layer is achieved to be about 110 ps. The paper also described the extraction scheme for the event start time of cosmic events. 相似文献
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In order to study the possibility of improving the timing performance of the time of flight (TOF) systems, which are made of plastic scintillator counters, and read out by photomultiplier tubes (PMT) with mesh dynodes and conventional electronics, we have conducted a study using faster PMTs and ultra fast waveform digitizers to read out the plastic scintillators. Different waveform analysis methods are used to calculate the time resolution of such a system. Results are compared with the conventional discriminating method based on a threshold and pulse height. Our tests and analysis show that significant timing performance improvements can be achieved by using this new system. 相似文献
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In order to study the possibility of improving the timing performance of the time of flight (TOF) systems, which are made of plastic scintillator counters, and read out by photomultiplier tubes (PMT) with mesh dynodes and conventional electronics, we have conducted a study using faster PMTs and ultra fast waveform digitizers to read out the plastic scintillators. Different waveform analysis methods are used to calculate the time resolution of such a system. Results are compared with the conventional discriminating method based on a threshold and pulse height. Our tests and analysis show that significant timing performance improvements can be achieved by using this new system. 相似文献
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Study of the energy response of high pressure ionization chamber for high energy gamma-ray 总被引:3,自引:0,他引:3
The energy response calibration of the commonly used high pressure ionization chamber is very difficult to obtain when the gamma-ray energy is more than 3 MeV. In order to get the calibration of the higher part of the high pressure ionization chamber, we use the Fluka Monte Carlo program to perform the energy response in both the spherical and the cylindrical high pressure ionization chamber which are full of argon gas. The results compared with prior study when the gamma-ray energy is less than 1.25 MeV. Our result of Monte Carlo calculation shows agreement with those obtained by measurement within the uncertainty of the respective methods. The calculation of this study is significant for the high pressure ionization chamber to measure the high energy gamma-ray. 相似文献
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