2004/09/09 by M. Campbell, M. Chefdeville, P. Colas +13 · 2 citations
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Particle Detector Development and Performance #Radiation Detection and Scintillator Technologies #hep-ex #physics.ins-det
paper · pdf · doi:10.1016/j.nima.2004.11.036
published as Nucl.Instrum.Meth.A540:295-304,2005 · 15 pages, 9 included postscript figures, 5 separate jpeg figures, submitted to Nucl. Instr. and Meth. A. A complete postscript version with high resolution figures 1, 3, 11, 12 and 14 can be found at http://www.nikhef.nl/~i06/RandD/final/letter4.ps
arxiv created 2004/09/09 · openalex publication_date 2004/12/29 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
A small drift chamber was read out by means of a MediPix2 readout chip as direct anode. A Micromegas foil was placed 50 μm 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.