The TOFp/pVPD time-of-flight system for STAR
The TOFp/pVPD time-of-flight system for STAR
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DOI：
10.1016/j.nima.2003.11.414
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发表时间：
2003-08
影响因子：
1.4
通讯作者：
W. Llope;F. Geurts;J. W. Mitchell;Z. Liu;N. Adams;G. Eppley;D. Keane;J. Li;F. Liu;L. Liu-L
中科院分区：
文献类型：
--
作者：
W. Llope;F. Geurts;J. W. Mitchell;Z. Liu;N. Adams;G. Eppley;D. Keane;J. Li;F. Liu;L. Liu-L
为STAR实验建立了一个飞行时间系统，用于直接识别RHIC中197Au+197Au碰撞产生的强子。该系统由两个独立的检测器子系统组成，一个称为伪顶点位置检测器（pVPD，“开始”检测器），另一个称为飞行时间补丁（TOFp，“停止”检测器）。每个探测器都基于传统的闪烁体/光电管技术，包括定制的高性能前端电子设备和通用的基于camac的数字化和读出。本文将描述该系统的设计及其在2001年RHIC运行中的性能。pVPD获得的起始分辨率为24ps，这意味着pVPD单探测器分辨率为58ps。系统在所有探测器通道上的平均总时间分辨率为87ps，允许动量高达1.8GeV/c的直接π/K/p判别，以及高达3GeV/c的直接(π+K)/p判别。
A time-of-flight system was constructed for the STAR Experiment for the direct identification of hadrons produced in197Au+197Au collisions at RHIC. The system consists of two separate detector subsystems, one called the Pseudo Vertex Position Detector (pVPD, the “start” detector) and the other called the Time of Flight Patch (TOFp, the “stop” detector). Each detector is based on conventional scintillator/phototube technology and includes custom high-performance front-end electronics and a common CAMAC-based digitization and read-out. The design of the system and its performance during the 2001 RHIC run will be described. The start resolution attained by the pVPD was 24ps, implying a pVPD single-detector resolution of 58ps. The total time resolution of the system averaged over all detector channels was 87ps, allowing direct π/K/p discrimination for momenta up to ∼1.8GeV/c, and direct (π+K)/p discrimination up to ∼3GeV/c.