An integrated readout system for drift chambers: the application of monolithic CMOS pixel sensors as segmented direct anode

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Campbell, M. and Heijne, E.H.M. and Llopart, X. and Chefdeville, M.A. and Colas, P. and Giomataris, Y. and Colijn, A.P. and Fornaini, A. and van der Graaf, H. and Kluit, P. and Timmermans, J. and Visschers, J.L. and Schmitz, J. (2006) An integrated readout system for drift chambers: the application of monolithic CMOS pixel sensors as segmented direct anode. In: 9th Topical Seminar on Innovative Particle and Radiation Detectors, 23-26 May 2004, Siena, Italy.

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Abstract:A small TPC has been 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 δ-rays.
Item Type:Conference or Workshop Item
Copyright:© 2006 Elsevier
Faculty:
Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:
Link to this item:http://purl.utwente.nl/publications/63712
Official URL:http://dx.doi.org/10.1016/j.nuclphysbps.2004.10.089
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