The HERA-B ring imaging Cherenkov counter
The HERA-B ring imaging Cherenkov counter
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HERA-B 环形成像切伦科夫计数器
DOI：
10.1016/j.nima.2003.08.173
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发表时间：
2003
影响因子：
1.4
通讯作者：
E. al.
中科院分区：
文献类型：
--
作者：
I. Arino;E. al.
HERA-B RICH在C4 F10气体中使用2.8米的辐射路径和一个24平方米的大型球面镜来成像切伦科夫环。光子探测器由2240个滨松多阳极光电倍增管组成，约有27000个通道。在每个光电倍增管前面的2：1缩小双透镜望远镜以增加像素尺寸为代价增加了敏感区域，导致对分辨率的贡献大致与色散相匹配。该计数器于1999年1月建成，运行多年来性能稳定可靠。完全达到了环形成像切伦科夫计数器的设计性能：对于β=1的粒子，RICH中检测到的平均光子数为33，细粒度和粗粒度区域的单次命中分辨率分别为0.7和1 mrad。
The HERA-B RICH uses a radiation path length of 2.8 m in C4F10gas and a large 24 m2spherical mirror for imaging Cherenkov rings. The photon detector consists of 2240 Hamamatsu multi-anode photomultipliers with about 27000 channels. A 2:1 reducing two-lens telescope in front of each photomultiplier tube increases the sensitive area at the expense of increased pixel size, resulting in a contribution to the resolution which roughly matches that of dispersion. The counter was completed in January of 1999, and its performance has been steady and reliable over the years it has been in operation. The design performance of the Ring Imaging Cherenkov counter was fully reached: the average number of detected photons in the RICH for a β=1 particle was found to be 33 with a single-hit resolution of 0.7 and 1 mrad in the fine and coarse granularity regions, respectively.