Thin shell plastic optics: Application to hard X-ray telescopes

Details Thin shell plastic optics: Application to hard X-ray telescopes Thin shell plastic optics: Application to hard X-ray telescopes

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...201.8212s&link_type=abstract

American Astronomical Society, 201st AAS Meeting, #82.12; Bulletin of the American Astronomical Society, Vol. 34, p.1241

Physics

Optics

Scientific paper

We present new results from a program to develop large area X-ray telescopes that are made from thin plastic shells. We use multi-shell cylindrical lenses in a point-to-point configuration to form full aperture images of the small focal spot in an X-ray tube on a microchannel plate detector. The image data are analyzed to yield radial profiles and encircled energy curves. The derived parameters (FWHM and HEW) can be extrapolated to the case of a telescope that is a conical approximation to Wolter 1 optics. The plastic shells can be coated with suitable mono- or multilayers that allow for a wideband coverage of X-ray energies. Our current program is focused on the development of a large area, hard X-ray telescope for a balloon payload (B-MINE). Our goal is to detect the 68 and 78 keV 44Ti lines from the CAS-A supernova remnant. The B-MINE microcalorimeter detector has a 50 eV (FWHM) energy resolution and almost no internal bakground. This combination of a low background and a narrow FWHM detector allows us to distinguish between narrow and broad emission lines. We use the SAX CAS-A results to predict a B-MINE detection of 70 sigma at 68 keV.

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