A new high-resolution TOF technology
A new high-resolution TOF technology
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DOI：
10.1016/s0168-9002(99)01008-6
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发表时间：
2000-03
影响因子：
1.4
通讯作者：
P. Fonte;A. Smirnitski;M. Williams
中科院分区：
文献类型：
--
作者：
P. Fonte;A. Smirnitski;M. Williams
在 ALICE 合作的框架内，我们最近研究了在雪崩模式和大气压力下运行的多间隙电阻板室的性能，用于飞行时间测量。该探测器提供了 120ps sigma 的整体（探测器加电子设备）计时精度，MIP 的效率为 98%。室有四个 0.3mm 的气隙，每个气隙由金属化陶瓷板和玻璃板限制，有效尺寸为 4×4cm2。气体混合物含有C2H2F4+5%异丁烷+10%SF6。百分之几的流光放电（每次释放约 20pC）是可以容忍的，没有任何明显的不便。该探测器开启了经济实惠且可靠的高粒度大面积 TOF 探测器的前景，其效率和时间分辨率与现有的基于闪烁体的 TOF 技术相当，但每通道的价格显着降低了一个数量级。
In the framework of the ALICE collaboration we have recently studied the performance of multigap Resistive Plate Chambers operated in avalanche mode and at atmospheric pressure for time-of-flight measurements. The detector provided an overall (detector plus electronics) timing accuracy of 120ps sigma at an efficiency of 98% for MIPs. The chambers had four gas gaps of 0.3mm, each limited by a metallised ceramic plate and a glass plate, with an active dimension of 4×4cm2. The gas mixture contained C2H2F4+5% isobutane+10% SF6. A few percent of streamer discharges, each releasing about 20pC, was tolerated without any noticeable inconvenience. This detector opens perspectives of affordable and reliable high granularity large area TOF detectors, with an efficiency and a time resolution comparable to existing scintillator-based TOF technology but with significantly, up to an order of magnitude, lower price per channel.