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A Focusing X-Ray Telescope Monochromator*

Published online by Cambridge University Press:  12 April 2016

Aaron S. Filler  and
Benjamin S. Fraenkel
Aaron S. Filler
Affiliation:
Laboratory of X-ray and Far Ultra-Violet Spectroscopy, Racah Institute of Physics, The Hebrew University, Jerusalem, Israel
Benjamin S. Fraenkel
Affiliation:
Laboratory of X-ray and Far Ultra-Violet Spectroscopy, Racah Institute of Physics, The Hebrew University, Jerusalem, Israel

Extract

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In order to resolve clusters of X-ray lines emitted by flares (Fritz et al, 1967; Neupert and Swartz, 1970) and to determine line shapes, a considerable resolving power is needed. The angular size of flares, typically about 2’ will not allow the necessary resolution to be obtained without a very fine slit system combined with the flat crystal X-ray spectrometer. In stellar X-ray spectroscopy large plane diffracting crystals will be associated with large counters, which in turn would act as a source of considerable noise.

Type
Section VI / Spectra of Cosmic X-Ray Sources
Information
International Astronomical Union Colloquium , Volume 14: Special Issue: Ultraviolet and X-Ray Spectroscopy of Astrophysical and Laboratory Plasmas , November 1972 , pp. 870
Copyright
Copyright © Reidel 1972

Footnotes

*

The idea discussed here was initiated as a result of a NSF research fellowship granted to B. S. Fraenkel at the NASA Ames Research Center, California, during 1968–1970. The work presented here was in part facilitated through a grant by the Ford Foundation.

References

Fritz, G., Kreplin, R. W., Meekins, J. F., Unzicker, A. E., and Friedman, H.: 1967, Astrophys. J. 148, L133; see also Meekins, J. F., Kreplin, R. W., Chubb, T. A., and Friedman, H.: 1968, Science 162, 891.Google Scholar
Neupert, W. M. and Swartz, M.: 1970, Astrophys. J. Letters 160, L189; see also Neupert, W. M., Gates, W., Swartz, M., and Young, R.: 1967, Astrophys. J. 149, L79.Google Scholar