| Issue |
EAS Publications Series
Volume 37, 2009
Astrophysics Detector Workshop 2008
|
|
|---|---|---|
| Page(s) | 181 - 188 | |
| DOI | https://doi.org/10.1051/eas/0937022 | |
| Published online | 11 June 2009 | |
P. Kern (ed)
EAS Publications Series, 37 (2009) 181-188
Gas pixel detector for x-ray observation
1
CEA, Irfu, SPP, Centre de Saclay, 91191 Gif-sur-Yvette, France;
2
CERN, 1211 Genève 23, Switzerland
3
NIKHEF, Kruislaan 409, Amsterdam 1098 SJ, The Netherlands
Corresponding author: david.attie@cea.fr
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.
© EAS, EDP Sciences, 2009