The readout of a GEM or Micromegas-equipped TPC by means of the Medipix2 CMOS sensor as direct anaode

Colas, P. and Colijn, A.P. and Forniani, A. and Giomataris, Y. and Graaf van der, H. and Heijne, E.H.M. and Llopart, X. and Schmitz, J. and Timmermans, J. and Visschers, J.L. (2004) The readout of a GEM or Micromegas-equipped TPC by means of the Medipix2 CMOS sensor as direct anaode. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 535 (1-2). pp. 506-510. ISSN 0168-9002

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Abstract:	We have applied the Medipix2 pixel CMOS chip as direct anode readout for a TPC. For the gas ampli?cation two options have been investigated: (i) a three-stage GEM system and (ii) a Micromegas mesh. The structure of the cloud of primary electrons, left after interactions of 55 Fe quanta with the gas is visible with unprecedented precision. This proof-of-principle is an essential step in our project to realize a monolithic pixel sensor with integrated Micromegas, to be developed specially for the readout of TPCs, and applicable for drift chambers in general.
Item Type:	Article
Copyright:	© 2004 Elsevier Science
Faculty:	Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:	Semiconductor Components (SC)
Link to this item:	http://purl.utwente.nl/publications/67727
Official URL:	http://dx.doi.org/10.1016/j.nima.2004.07.180
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