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Gas pixel detector for x-ray observation

  • P. Kern, D. Attié (a1), P. Colas (a1), E. Delagnes (a1), Y. Giomataris (a1), M. Campbell (a2), X. Llopart (a2), M. Chefdeville (a3), H. van der Graaf (a3), J. Timmermans (a3) and J. Visschers (a3)...

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.

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[2] Bellazzini, R., et al., 2007, Nucl. Instr. Meth. A, 572, 160
[3] Black, J.K., et al., 2007, Nucl. Instr. Meth. A, 581, 755
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[5] Chefdeville, M., et al., 2006, Nucl. Instr. Meth. A, 556, 490
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Gas pixel detector for x-ray observation

  • P. Kern, D. Attié (a1), P. Colas (a1), E. Delagnes (a1), Y. Giomataris (a1), M. Campbell (a2), X. Llopart (a2), M. Chefdeville (a3), H. van der Graaf (a3), J. Timmermans (a3) and J. Visschers (a3)...

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