The TORCH PMT: a close packing, multi-anode, long life MCP-PMT for Cherenkov applications-猫眼课题宝

TORCH PMT：适合切伦科夫应用的密堆积、多阳极、长寿命 MCP-PMT

DOI：

10.1088/1748-0221/10/05/c05003

发表时间：

2015

期刊：

Journal of Instrumentation

影响因子：

1.3

通讯作者：

中科院分区：

工程技术4区

文献类型：

作者：

Conneely T

Photek（英国）和TORCH合作正在进行一项为期三年的开发计划，以生产用于单光子检测的新型方形MCP-PMT。TORCH探测器旨在利用基于切伦科夫光的飞行时间方法，提供2-10 GeV/c动量范围内的粒子识别。这是一个独立的研发项目，在LHCb中有可能应用，并已被提议用于LHCb升级。微通道板（MCP）探测器将提供40 ps的单光子定时精度，其发展将包括以下特性：(i)长寿命高达至少5 C/ cm2；（ii）多阳极输出，在水平和垂直方向上的空间分辨率分别为6毫米和0.4毫米，采用了一种新的电荷共享技术；(3)相对两侧充填紧密，水平方向有效面积填充系数为88%。本文将讨论MCP探测器性能的模拟结果，包括探测器的脉冲高度变化、NINO阈值水平和潜在电荷共享技术，这些技术可以提高像素布局的物理间距之外的位置分辨率。此外，还将介绍一种利用各向异性导电膜（ACF）耦合MCP-PMT输出垫的新方法。通过允许前端电子器件和MCP检测器之间非常接近，这样可以最大限度地减少寄生输入电容。

Photek (UK) and the TORCH collaboration are undertaking a three year development program to produce a novel square MCP-PMT for single photon detection. The TORCH detector aims to provide particle identification in the 2–10 GeV/c momentum range, using a Time-of-Flight method based on Cherenkov light. It is a stand-alone R&D project with possible application in LHCb, and has been proposed for the LHCb Upgrade. The Microchannel Plate (MCP) detector will provide a single photon timing accuracy of 40 ps, and its development will include the following properties:(i) Long lifetime up to at least 5 C/cm 2;(ii) Multi-anode output with a spatial resolution of 6 mm and 0.4 mm respectively in the horizontal and vertical directions, incorporating a novel charge-sharing technique;(iii) Close packing on two opposing sides with an active area fill factor of 88% in the horizontal direction. Results from simulations modelling the MCP detector performance factoring in the pulse height variation from the detector, NINO threshold levels and potential charge sharing techniques that enhance the position resolution beyond the physical pitch of the pixel layout will be discussed. Also, a novel method of coupling the MCP-PMT output pads using Anisotropic Conductive Film (ACF) will be described. This minimises parasitic input capacitance by allowing very close proximity between the frontend electronics and the MCP detector.