Testbeam studies of a TORCH prototype detector
Testbeam studies of a TORCH prototype detector
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DOI：
10.1016/j.nima.2018.07.023
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发表时间：
2018-05
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通讯作者：
N. Brook;L. Garc'ia;T. Conneely;D. Cussans;M. Dijk;K. Fohl;R. Forty;C. Frei;R. Gao;T. Gys;T. Hancock;N. Harnew;J. Lapington;J. Milnes;D. Piedigrossi;J. Rademacker;A. Garc'ia
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作者：
N. Brook;L. Garc'ia;T. Conneely;D. Cussans;M. Dijk;K. Fohl;R. Forty;C. Frei;R. Gao;T. Gys;T. Hancock;N. Harnew;J. Lapington;J. Milnes;D. Piedigrossi;J. Rademacker;A. Garc'ia
TORCH是一种新型的飞行时间检测器，用于提供2至10 GeV/c动量之间的带电粒子识别。TORCH结合了在10毫米厚的石英辐射板内产生的多个切伦科夫光子的到达时间，以实现每个入射粒子15 ps的飞行时间分辨率。定制的微通道板光电倍增管（MCP-PMT）和相关的读出系统利用相邻像素之间的创新电荷共享技术来获得每个切伦科夫光子所需的70 ps时间分辨率。已经进行了一项为期五年的研究和发展方案，最终建造了一个小型原型TORCH模块。在欧洲核子研究中心的测试束中，该原型机与定制的电子设备和读出系统一起成功运行。一个完整的分析链已经开发重建数据和校准探测器。结果与使用商用Planacon MCP-PMT的结果进行了比较，单光子分辨率接近80 ps。光子计数效率与探测器的GEANT4蒙特卡罗模拟结果基本一致。小规模演示器是全尺寸TORCH模块的前体（带有一块660x1250x10毫米3的散热器板），目前正在建造中。
TORCH is a novel time-of-flight detector that has been developed to provide charged-particle identification between 2 and 10 GeV/c momentum. TORCH combines arrival times from multiple Cherenkov photons produced within a 10 mm-thick quartz radiator plate, to achieve a 15 ps time-of-flight resolution per incident particle. A customised Micro-Channel Plate photomultiplier tube (MCP-PMT) and associated readout system utilises an innovative charge-sharing technique between adjacent pixels to obtain the necessary 70 ps time resolution of each Cherenkov photon. A five-year R&D programme has been undertaken, culminating in the construction of a small-scale prototype TORCH module. In testbeams at CERN, this prototype operated successfully with customised electronics and readout system. A full analysis chain has been developed to reconstruct the data and to calibrate the detector. Results are compared to those using a commercial Planacon MCP-PMT, and single photon resolutions approaching 80 ps have been achieved. The photon counting efficiency was found to be in reasonable agreement with a GEANT4 Monte Carlo simulation of the detector. The small-scale demonstrator is a precursor to a full-scale TORCH module (with a radiator plate of 660× 1250× 10 mm 3), which is currently under construction.