Speaker
Description
Owing to their single photon sensitivity and fast rise time, micro-channel-plate photomultipliers (MCP-PMTs) make good candidates as photon detectors for the Time Of Internally Reflected Cherenkov light detector (TORCH) that is proposed as part of the phase two upgrade of the LHCb experiment.
The TORCH detector has a target time resolution per photon of approximately 70ps, required to achieve an approximately three standard deviation separation of pions and kaons at 10 GeV/c from their time-of-flight over a 10m flight distance.
A new high-granularity 16-by-96 channel MCP-PMT with a directly coupled anode has been developed in conjunction with Photek Ltd.
This device is designed to decrease the pixel pitch to 0.55\,mm, giving improved spatial resolution and importantly lower per-pixel occupancies.
This talk will cover cross-talk characterisation studies, used to determine the spatial resolution of the device. The experimental results are compared with simulation studies. The simulation is performed using CST studio, a finite element method solver that models the field and propagation of electrons in the device. Capacitive effects in the anode are simulated using a LT-Spice model. Overall, the simulation results demonstrate minimal effects of cross-talk on the device's output
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