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29 March 2024
 
  » arxiv » physics/0409048

 Article overview


The detection of single electrons by means of a Micromegas-covered MediPix2 pixel CMOS readout circuit
M. Campbell ; M. Chefdeville ; P. Colas ; A.P. Colijn ; A. Fornaini ; Y. Giomataris ; H. van der Graaf ; E.H.M Heijne ; P. Kluit ; X. Llopart ; J. Schmitz ; J. Timmermans ; J.L. Visschers ;
Date 9 Sep 2004
Journal Nucl.Instrum.Meth. A540 (2005) 295-304 DOI: 10.1016/j.nima.2004.11.036
Subject Instrumentation and Detectors | physics.ins-det hep-ex
AbstractA small drift chamber was read out by means of a MediPix2 readout chip as direct anode. A Micromegas foil was placed 50 $mu$m above the chip, and electron multiplication occurred in the gap. With a He/Isobutane 80/20 mixture, gas multiplication factors up to tens of thousands were achieved, resulting in an efficiency for detecting single electrons of better than 90% . We recorded many frames containing 2D images with tracks from cosmic muons. Along these tracks, electron clusters were observed, as well as delta-rays.
Source arXiv, physics/0409048
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