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Detector Seminar

From: amazzari@mail.cern.ch
Date: 11/26/97
Time: 10:05:02 AM
Remote Name: Ariella Mazzari

Comments

Here's a reminder for next Monday's detector seminar which may be of special interest to the LHC-B group:

Monday 1 December

DETECTOR SEMINAR at 11:00 hrs - ECP Conference Room bldg 13/2-005

Hybrid PhotoDiodes as Cherenkov light detectors

by Malcolm John / Imperial College

Cherenkov light detection in LHC experiments will present challenging problems. Single photons have to be detected, their positions measured and all this within the 25ns LHC bunch-crossing period.

The Hybrid PhotoDiode (HPD), which uses silicon detectors within a vacuum phototube, presents a promising solution. Tests have been carried out this summer, in a charged particle beam, to investigate the performance of commercially available HPDs in a prototype of a Ring-Imaging Cherenkov counter for the proposed LHC-B experiment.

I shall present results from the beam tests, focusing on the properties of the HPDs for this specific application, viz. Single photon sensitivity, stability and uniformity, signal/noise, spatial precision,...

Consequences of these results for the performance of the LHC-B RICH counters will be discussed.

Wolfgang Tejessy.

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