Soft X-ray images of the solar corona using normal incidence optics

Details Soft X-ray images of the solar corona using normal incidence optics Soft X-ray images of the solar corona using normal incidence optics

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jphys..49..115b&link_type=abstract

(IAU, ESA, CNRS, et al., Colloquium on UV and X-ray Spectroscopy of Astrophysical and Laboratory Plasmas, 102nd, Beaulieu-sur-Me

Astronomy and Astrophysics

Astrophysics

5

Coronal Loops, Solar Corona, X Ray Telescopes, Emission Spectra, Mirrors, Photographic Recording, Rocket Flight, Rocket-Borne Instruments, Solar Activity

Scientific paper

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 mirror 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 A radiation. The image was recorded during a rocket flight on October 25, 1985 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.

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