17 September 2012 The background of the gas pixel detector and its impact on imaging X-ray polarimetry
Author Affiliations +
Abstract
The background of the Gas Pixel Detector is expected to be negligible for polarimetry of point sources due to the intrinsic low atomic number and density of the He-DME mixtures and to its imaging properties. Also the background for extended sources is expected to be negligible at least down to the smallest flux for sensitive polarimetry in a reasonable observing time. However in the spatial distribution of the background in a laboratory environment we observed an accumulation on the edges of the sensitive plane due to the presence of the nearby cell walls. We recently developed gas pixel detectors with a new design of the gas cell having a larger distance of the walls from the sensitive plane. In this paper we compare the spatial distribution of the measured background for the two design and their residual systematics. Also the impact of the background in the case of SgrB2 a faint extended source in the galactic center region is evaluated.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Paolo Soffitta, Riccardo Campana, Enrico Costa, Sergio Fabiani, Fabio Muleri, Alda Rubini, Ronaldo Bellazzini, Alessandro Brez, Massimo Minuti, Michele Pinchera, Gloria Spandre, "The background of the gas pixel detector and its impact on imaging X-ray polarimetry", Proc. SPIE 8443, Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray, 84431F (17 September 2012); doi: 10.1117/12.925385; https://doi.org/10.1117/12.925385
PROCEEDINGS
11 PAGES


SHARE
RELATED CONTENT

A transmissive x ray polarimeter design for hard x ray...
Proceedings of SPIE (August 24 2015)
Development of cosmic x-ray polarimeter
Proceedings of SPIE (June 15 2006)
Development of a hard x-ray imaging polarimeter
Proceedings of SPIE (February 15 1994)
The design and qualification of the GEMS X-ray polarimeters
Proceedings of SPIE (September 17 2012)
A conceptual design of hard X ray focal plane detector...
Proceedings of SPIE (September 17 2012)

Back to Top