An X-ray polarimeter for hard X-ray optics
  Development of multi-layer optics makes feasible the use of X-ray telescope at energy up to 60-80 keV: in this paper we discuss the extension of photoelectric polarimeter based on Micro Pattern Gas Chamber to high energy X-rays. We calculated the sensitivity with Neon and Argon based mixtures at high pressure with thick absorption gap: placing the MPGC at focus of a next generation multi-layer optics, galatic and extragalactic X-ray polarimetry can be done up till 30 keV. 
Fabio Muleri (1), Ronaldo Bellazzini (2), Enrico Costa (1), Paolo   Soffitta (1), Francesco Lazzarotto (1), Marco Feroci (1)...