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Proceedings Paper

X-Ray Spectrometer For ROSAT II (SPECTROSAT)
Author(s): Peter Predehl; Heinrich Brauninger
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Paper Abstract

The objective transmission grating was one of the earliest inventions in the field of X-ray astronomy and has been incorporated into Skylab, HERO-P, and EXOTAT. In recent years there have been advances in grating technology and spectrometer design. A high precision mechanical ruling and replication process for manufacturing large self-supporting transmission gratings has been developed by an industrial manufacturer in cooperation with the Max-Planck-Institute (MPI). Theoretical analyses have determined the optimum configuration of the grating facets and the grating surface in order to correct third order aberations and obtain maximum resolving power. We have verified experimentally that the predicted efficiencies may be achieved. In addition, an experimental study of large grating assemblies for space telescopes was made in industry with scientific guidance by MPI. Main objectives of this study were the determination of mechanical loads during launch, as well as the design, construction and fabrication of a representative model of a ROSAT grating ring. Performancy studies including instrument pro-perties as well as the simulated radiation from hot plasmas have shown the ability of SPECTROSAT to perform high efficiency, high resolution line-spectroscopy on a wide variety of cosmic X-ray sources.

Paper Details

Date Published: 1 January 1986
PDF: 7 pages
Proc. SPIE 0733, Soft X-Ray Optics and Technology, (1 January 1986); doi: 10.1117/12.964911
Show Author Affiliations
Peter Predehl, Institut fur extraterrestrische Physik (FRG)
Heinrich Brauninger, Institut fur extraterrestrische Physik (FRG)

Published in SPIE Proceedings Vol. 0733:
Soft X-Ray Optics and Technology
E. Koch; Guenther A. Schmahl, Editor(s)

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