The detection of single electrons using a Microgas gas amplification and a MediPix2 CMOS pixel readout

Forniani, A. and Campbell, M. and Chefdeville, M.A. and Colas, P. and Colijn, A.P. and van der Graaf, H. and Giomataris, Y. and Heijne, E.H.M. and Kluit, P. and Llopart, X. and Schmitz, J. and Timmermans, J. and Visschers, J.L. (2005) The detection of single electrons using a Microgas gas amplification and a MediPix2 CMOS pixel readout. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 546 (1-2). pp. 270-273. ISSN 0168-9002

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Abstract:	By placing a Micromegas gas gain grid on top of a CMOS pixel readout circuit (MediPix2), we developed a device which acts as a pixel-segmented direct anode in gas-filled detectors. With a He/Isobutane 80/20 mixture (capable of achieving gas gain factors up to 20×103) and employing a drift length of 15 mm, signals from radioactive sources and cosmic radiation were measured. Single primary electrons originating from the passage of cosmic muons through the gas volume were detected with an efficiency higher than 90%.
Item Type:	Article
Copyright:	© 2005 Elsevier Science
Faculty:	Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:	Semiconductor Components (SC)
Link to this item:	http://purl.utwente.nl/publications/67704
Official URL:	http://dx.doi.org/10.1016/j.nima.2005.03.029
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