| Issue |
J. Phys. Colloques
Volume 49, Number C1, Mars 1988
IAU Colloquium N° 102 on UV and X-ray Spectroscopy of Astrophysical and Laboratory Plasmas
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| Page(s) | C1-115 - C1-118 | |
| DOI | https://doi.org/10.1051/jphyscol:1988124 | |
J. Phys. Colloques 49 (1988) C1-115-C1-118
DOI: 10.1051/jphyscol:1988124
SOFT X-RAY IMAGES OF THE SOLAR CORONA USING NORMAL INCIDENCE OPTICS
M.E. BRUNER1, B.M. HAISCH1, W.A. BROWN1, L.W. ACTON1 et J. H. UNDERWOOD21 Lockheed Palo Alto Research Laboratory, Palo Alto, CA 94303, U.S.A.
2 Lawrence Berkeley Laboratory, Berkeley, CA 94720, U.S.A.
Abstract
A solar coronal loop system has been photographed in soft X-rays using a normal incidence telescope based on multilayer mirror technology. The telescope consisted of a spherical objective rnirror of 4 cm aperture and 1 m focal length, a film cassette, and a focal plane shutter. A metallized thin plastic film filter was used to exclude visible light. The objective mirror was covered with a multilayer coating consisting of alternating layers of tungsten and carbon whose combined thicknesses satisfied the Bragg diffraction condition for 44 Ã... radiation The image was recorded during a rocket flight on 1985 October 25, and was dominated by emission lines arising from the Si XII spectrum. The rocket also carried a high resolution soft X-ray spectrograph that confirmed the presence of Si XII line radiation in the source. This image represents the first successful use of multilayer technology for astrophysical observations.