摘要
在飞行时间测量中 ,噪声 ,幅度测量误差 ,以及信号本身的差异等因素 ,都会导致时间测量误差 .本文对这些因素的产生原因、影响机制进行分析 ,并且以GEANT4模拟BESⅢ的TOF探测器得到的输出信号为对象 ,进行了定量的模拟研究 .结果表明 ,为了获得好的时间测量精度 ,选择合适的甄别域非常重要 .如果要获得更高的时间测量精度 ,则有必要进行信号形状的测量 .
In TOF measurement, the factors that can increase the time resolution include noise, amplitude measurement error, and the difference of pulse amplitudes and shapes. This article discusses how these factors affect time resolution, and performs quantitative analysis based on the GEANT4 simulation result of the BESⅢ's TOF detector. The result shows that the discriminator level must be selected carefully. To get better time resolution, pulse waveform digitizing is necessary.
出处
《高能物理与核物理》
CSCD
北大核心
2004年第11期1170-1175,共6页
High Energy Physics and Nuclear Physics
