Normal-incidence soft X-ray telescopes

Details Normal-incidence soft X-ray telescopes Normal-incidence soft X-ray telescopes

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991opten..30.1109s&link_type=abstract

Optical Engineering (ISSN 0091-3286), vol. 30, Aug. 1991, p. 1109-1115.

Computer Science

Sound

11

Incidence, Layers, Rocket-Borne Instruments, Spaceborne Telescopes, Spacecraft Control, X Ray Telescopes, Fourier Transformation, Mirrors, Optical Materials, Pointing Control Systems, Sounding Rockets

Scientific paper

Photos obtained during 5 min of observation time from the flight of a 25-cm-diameter normal-incidence soft-X-ray (63.5 A) telescope on September 11, 1989, are analyzed, and the data are compared to the results expected from tests of the mirror surfaces. These tests cover a range of spatial periods from 25 cm to 1 A. The photos demonstrate a resolution close to the photon shot-noise limit and a reduction in the scattering of the multilayer mirror compared to a single surface for scattering angles above 1 arcmin, corrresponding to surface irregularities with spatial periods below 10 microns. These results are used to predict the possible performance of future telescopes. Sounding rocket observations might be able to reach a resolution around 0.1 arcsec.

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