InFOCμS Hard X-ray Imaging Telescope

Details InFOCμS Hard X-ray Imaging Telescope InFOCμS Hard X-ray Imaging Telescope

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005exa....20..121t&link_type=abstract

Experimental Astronomy, Volume 20, Issue 1-3, pp. 121-129

Astronomy and Astrophysics

Astronomy

3

Hard X-Rays, Multilayer Mirror, Cdznte Pixellated Detector, Balloon Experiments, Background

Scientific paper

InFOCμS is a new generation balloon-borne hard X-ray telescope with focusing optics and spectroscopy. We had a successful 22.5-hour flight from Fort Sumner, NM on September 16,17, 2004. In this paper, we present the performance of the hard X-ray telescope, which consists of a depth-graded platinum/carbon multilayer mirror and a CdZnTe detector. The telescope has an effective area of 49 cm2 at 30 keV, an angular resolution of 2.4 arcmin (HPD), and a field of view of 11 arcmin (FWHM) depending on energies. The CdZnTe detector is configured with a 12 × 12 segmented array of detector pixels. The pixels are 2 mm square, and are placed on 2.1 mm centers. An averaged energy resolution is 4.4 keV at 60 keV and its standard deviation is 0.36 keV over 128 pixels. The detector is surrounded by a 3-cm thick CsI anti coincidence shield to reduce background from particles and photons not incident along the mirror focal direction. The inflight background is 2.9 × 10-4 cts cm-2 sec-1 keV-1 in the 20 50 keV band.

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