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Gas pixel detector for x-ray observation

Published online by Cambridge University Press:  11 June 2009

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
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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
Copyright
© EAS, EDP Sciences, 2009

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References

Bellazzini, R., et al., 2003, Nucl. Instr. Meth. A, 510, 176 CrossRef
Bellazzini, R., et al., 2007, Nucl. Instr. Meth. A, 572, 160 CrossRef
Black, J.K., et al., 2007, Nucl. Instr. Meth. A, 581, 755 CrossRef
Campbell, M., et al., 2005, Nucl. Instr. Meth. A, 540, 295 CrossRef
Chefdeville, M., et al., 2006, Nucl. Instr. Meth. A, 556, 490 CrossRef
Colas, P., et al., 2004, Nucl. Instr. Meth. A, 535, 506 CrossRef
Giomataris, Y., et al., 1996, Nucl. Instr. Meth. A, 376, 29 CrossRef
Llopart, X., et al., 2002, IEEE Trans. Nucl. Sci., NS-49, 2279
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Wilson, C.T.R., 1923, Roy. Soc. Proc. A, 85, 1 CrossRef
Wyrsch, N., et al., 2005, Proc. MRS Symp., 869, 3

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