GEM scintillation readout with avalanche photodiodes

• Type: Article in International Scientific Journal
• Date: 2007

Authors

Conceicao, AS (Author) Other; Ferreira, LFR (Author) Other; Fernandes, LMP (Author) Other; Monteiro, CMB (Author) Other; Coelho, LCC (Author) Other; Azevedo, CDR (Author) Other; Veloso, JFCA (Author) Other; Lopes, JAM (Author) Other; dos Santos, JMF (Author) Other

Journal

Title: Journal of Instrumentation

Vol. 2

ISSN: 1748-0221

Publisher: Institute of Physics Publishing

Indexing

ISI Web of Knowledge - 11 Citations

Scopus - 10 Citations

Other information

Authenticus ID: P-004-7XF

DOI: 10.1088/1748-0221/2/09/p09010

Abstract (EN): The use of the scintillation produced in the charge avalanches in GEM holes as signal amplification and readout is investigated for xenon. A VUV-sensitive avalanche photodiode has been used as photosensor. Detector gains of about 4 x 104 are achieved in scintillation readout mode, for GEM voltages of 490 V and for a photosensor gain of 150. Those gains are more than one order of magnitude larger than what is obtained using charge readout. In addition, the energy resolutions achieved with the scintillation readout are lower than those achieved with charge readout. The GEM scintillation yield in xenon was measured as a function of GEM voltage, presenting values that are about a half of those achieved for the charge yield, and reach about 730 photons per primary electron at GEM voltages of 490 V.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9