The Bragg Crystal Spectrometer for SOLAR-A

Details The Bragg Crystal Spectrometer for SOLAR-A The Bragg Crystal Spectrometer for SOLAR-A

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991soph..136...89c&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 136, Nov. 1991, p. 89-104. Research supported by SERC, British National Space Centre, and U

Physics

Optics

161

Bragg Angle, Crystal Optics, Japanese Space Program, Resonance Lines, Solar Flares, Solar Spectrometers, Germanium, Plasma Heating, Space Missions

Scientific paper

Attention is given to the BCS, one of the instruments comprising the scientific payload of the Solar-A mission. The spectrometer employs four bent germanium crystals, views the whole sun, and observes the resonance line complexes of H-like Fe XXVI and He-like Fe XXV, Ca XIX, and S XV in four narrow wavelength ranges with a resolving power of between 3000 and 6000. The spectrometer is approaching ten-times better sensitivity than that of previous instruments, thus permitting a time resolution of better than 1 s to be achieved. The principal aim of the instrument is the measurement of the properties of the 10-to-50-million-K plasma created in the solar flares, with special emphasis on the heating and dynamics of the plasma during the impulsive phase.

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