The Lyman alpha coronagraph
Abstract
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.
- Publication:
-
COSPAR, 20th Plenary Meeting
- Pub Date:
- June 1977
- Bibcode:
- 1977cosp.meetU....K
- Keywords:
-
- Coronagraphs;
- Lyman Alpha Radiation;
- Rocket-Borne Instruments;
- Solar Instruments;
- Light Scattering;
- Plasma Temperature;
- Solar Radiation;
- Solar Temperature;
- Spectral Line Width;
- Solar Physics