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Gas pixel detector for x-ray observation

Published online by Cambridge University Press:  11 June 2009

P. Kern ,
D. Attié ,
P. Colas ,
E. Delagnes ,
Y. Giomataris ,
M. Campbell ,
X. Llopart ,
M. Chefdeville ,
H. van der Graaf  and
J. Timmermans
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D. Attié*
Affiliation:
CEA, Irfu, SPP, Centre de Saclay, 91191 Gif-sur-Yvette, France;
P. Colas
Affiliation:
CEA, Irfu, SPP, Centre de Saclay, 91191 Gif-sur-Yvette, France;
E. Delagnes
Affiliation:
CEA, Irfu, SPP, Centre de Saclay, 91191 Gif-sur-Yvette, France;
Y. Giomataris
Affiliation:
CEA, Irfu, SPP, Centre de Saclay, 91191 Gif-sur-Yvette, France;
M. Campbell
Affiliation:
CERN, 1211 Genève 23, Switzerland
X. Llopart
Affiliation:
CERN, 1211 Genève 23, Switzerland
M. Chefdeville
Affiliation:
NIKHEF, Kruislaan 409, Amsterdam 1098 SJ, The Netherlands
H. van der Graaf
Affiliation:
NIKHEF, Kruislaan 409, Amsterdam 1098 SJ, The Netherlands
J. Timmermans
Affiliation:
NIKHEF, Kruislaan 409, Amsterdam 1098 SJ, The Netherlands
J. Visschers
Affiliation:
NIKHEF, Kruislaan 409, Amsterdam 1098 SJ, The Netherlands
*
[email protected]
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Abstract

We report on the status of the R&D for a digital Time Projection Chamber based on Micromegas detectors using the CMOS chip TimePix as a direct readout anode protected by highly resistive a-Si:H layer. A small chamber was built as a demonstrator of the 2-D and 3-D imaging capabilities of this technique. We illustrate the new capabilities of this detector for x-ray observation with data taken from radioactive sources. This small TPC is a very useful tool both for studying gas properties thanks to its good efficiency for single electrons, and for reconstructing photoelectron direction for use as a soft x-ray polarimeter.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 37: Astrophysics Detector Workshop 2008 , 2009 , pp. 181 - 188
Copyright
© EAS, EDP Sciences, 2009

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References

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