【摘要】 基于多气隙电阻板室(MRPC)的STAR飞行时间探测器的一个板条的原型(TOFr)参加了2003年STAR实验的质子-质子对撞和氘-金对撞的物理运行.利用STAR实验中原有的赝顶点位置探测器(pVPD)和时间投影室(TPC),结合TOFr的时间及幅度信号,并考虑TOFr每个探测单元的尺寸,对影响时间分辨的各种因素进行了修正,实现了对TOFr的标定.实验数据给出的TOFr的本征时间分辨为85ps,在两倍标准方差下,其对π/K及K/p分辨的动量分别达到了1.6GeV/c和3.0GeV/c,大大提高了STAR探测器的粒子鉴别能力.更多还原

【Abstract】 A tray of Time of Flight detector based on MRPC technology took part in the physics run of STAR both in p+p and d+Au collisions in 2003. Together with the information from the Time Projection Chamber(TPC) and the pseudo-Vertex Position Detector (pVPD) of the STAR experiment,corrections are done to calibrate the new prototype TOF. The intrinsic time resolution of TOFr reaches 85ps and it extends the π/K and K/p separation up to 1.6GeV/c and 3.0GeV/c respectively.更多还原