Design of a 10 picosecond Time of Flight Detector using Avalanche Photodiodes

Details Design of a 10 picosecond Time of Flight Detector using Avalanche Photodiodes Design of a 10 picosecond Time of Flight Detector using Avalanche Photodiodes

2009-01-16

arxiv.org/abs/0901.2530v1

Physics

Instrumentation and Detectors

6 Pages, 3 figures

Scientific paper

We describe a detector for measuring the time of flight of forward protons at the Large Hadron Collider (LHC) up to and beyond the full instantaneous design luminosity of 1034 cm-2 s-1. Our design is based on deep diffused, high gain avalanche photodiodes (APDs) which give a signal of ~6000 e when traversed by 7 Teravolt protons. We observe pulse risetimes of 650 psec and a pulse width of 5 nsec and calculate a time resolution of ~10 psec and a maximum count rate of >100 Mhz.

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