Developing next generation fast-timing photon-detectors

开发下一代快速定时光子探测器

• 批准号: 2739595
• 金额: --
• 依托单位: University of Warwick
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2739595
• 关键词: Developing; next; generation; fast; timing

The ability to distinguish different types of charged particles is key to the programme of measurements that will be carried out with the LHCb experiment at the Large Hadron Collider. The Time Of internally Reflected Cherenkov light detector (TORCH) aims to separate charged particles based on their time-of-flight from their production point to a timing detector placed 9.5m downstream. At a fixed momentum, different types of particle will take more or less time to traverse the distance depending on how massive they are. Key to accurately separating the particles is a precise measurement of the particle arrival time. The TORCH project aims to use Cherenkov radiation emitted by particles traversing a quartz bar as a timing signal. To reach the precision needed for the LHCb experiment, individual Cherenkov photons needed to be timed to a few tens of picoseconds. The fast photon timing is provided by an array of micro-channel-plate photomultipliers (MCP-PMTs). Information from multiple photons can then be combined to achieve a very accurate measurement of a particles time-of-flight. The latest TORCH prototype features MCP-PMTs produced in collaboration with Photek Ltd, a leading UK manufacturer of photon detector devices. The CASE student will work with scientists and engineers at the University of Warwick and Photek on the simulation and characterisation a new generation of MCP-PMT that will be needed to cope with the rates of photons that will be seen when operating at the Large Hadron Collider. Simulations of the expected collision environment indicate that the rates are beyond the capabilities of existing devices.

区分不同类型带电粒子的能力是大型强子对撞机上的LHCb实验将进行的测量计划的关键。内反射切伦科夫光探测器(TORCH)旨在根据带电粒子从产生点到下游9.5米处的定时探测器的飞行时间将其分离。在动量固定的情况下，不同类型的粒子需要多少时间才能走完这段距离，这取决于它们的质量有多大。准确分离颗粒的关键是精确测量颗粒到达时间。火炬项目旨在利用穿过石英条的粒子发出的切伦科夫辐射作为计时信号。为了达到LHCb实验所需的精度，单个切伦科夫光子需要被计时到几十皮秒。快速的光子计时由微通道板式光电倍增管阵列(MCP-PMT)提供。然后，可以将来自多个光子的信息组合在一起，以实现对粒子飞行时间的非常准确的测量。最新的TORCH原型采用了与英国领先的光子探测器设备制造商Photek Ltd合作生产的MCP-PMT。这位案例学生将与华威大学和Photek大学的科学家和工程师合作，模拟和表征新一代MCP-PMT，这将需要它来应对在大型强子对撞机操作时将看到的光子速率。对预期碰撞环境的模拟表明，这些速率超出了现有设备的能力。