APD performance in a luminosity monitor at LEP

Avalanche photo-diodes (APDs) are being used as optical readout elements in a sampling electromagnetic calorimeter made of alternate layers of tungsten and plastic scintillators. The calorimeter serves as a small-angle luminosity monitor in the stray magnetic field of the ALEPH detector at LEP (CERN...

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Detalles Bibliográficos
Autores principales: Bartolomé, E, Boix, G, Casado, M P, Chmeissani, M, Clemente, S, Fernández, E, Garrido, L, Lorenz, E, Martínez, M, Merino, G, Riu, I, Sánchez, F, Wright, A
Lenguaje:eng
Publicado: 2000
Materias:
Detectors and Experimental Techniques
Acceso en línea:https://dx.doi.org/10.1016/S0168-9002(99)01222-X
http://cds.cern.ch/record/437495
Descripción
Sumario:Avalanche photo-diodes (APDs) are being used as optical readout elements in a sampling electromagnetic calorimeter made of alternate layers of tungsten and plastic scintillators. The calorimeter serves as a small-angle luminosity monitor in the stray magnetic field of the ALEPH detector at LEP (CERN). Its scintillators are coupled both to APDs and conventional PMTs simultaneously via wavelength shifter fibres. In this paper we present results on the overall performance of the APDs, including gain and stability versus time and energy, based on the direct comparison of the two photosensitive devices. (6 refs).

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