The ATM Soft X-Ray Slitless Spectrograph.
Abstract
The design of a soft x-ray slitless spectrograph to be flown on the first Apollo telescope mount is presented. The spectrograph consists of an x-ray transmission grating and an image-forming x-ray telescope. The transmission gratings investigated to date consist of thin film plastic replica gratings shadowed with gold. Grating constants of 0.8 microns are feasible; grating constants as small as 0.35 microns have been used, but at low efficiency. The x-ray telescope consists of two con focal mirror systems working at grazing incidence. The combined collecting area is 42 cm2 the focal length is 213 cm. Laboratory tests which demonstrate an angular resolution of better ~han 5 sec of arc and a spectral resolution of 0.2 A at 7 A will be discussed.
- Publication:
-
The Astronomical Journal Supplement
- Pub Date:
- 1968
- Bibcode:
- 1968AJS....73...85Z