The Lyman alpha coronagraph

Details The Lyman alpha coronagraph The Lyman alpha coronagraph

Jun 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977cosp.meetu....k&link_type=abstract

COSPAR, Plenary Meeting, 20th, Tel Aviv, Israel, June 7-18, 1977, Paper. 4 p.

Physics

Coronagraphs, Lyman Alpha Radiation, Rocket-Borne Instruments, Solar Instruments, Light Scattering, Plasma Temperature, Solar Radiation, Solar Temperature, Spectral Line Width

Scientific paper

The rocket-borne Lyman alpha coronagraph (RLAC) is to be used in the absence of a natural solar eclipse to determine coronal temperatures from measurements of the line width of Lyman-alpha and to determine neutral hydrogen densities of coronal material from the absolute intensity. The coronagraph consists of a 75-cm Fastie-Ebert scanning spectrometer with an AMR 641 photoelectric detection system, an off-axis parabolic primary mirror, and an occulting system. A special optical arrangement achieves rejection of radiation from the solar disk.

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