The stable solar analyzer

Details The stable solar analyzer The stable solar analyzer

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.286..227r&link_type=abstract

In ESA, Seismology of the Sun and Sun-Like Stars p 227-233 (SEE N89-25819 19-92)

Mathematics

Logic

Etalons, Helioseismology, Solar Instruments, Solar Observatories, Chromosphere, Solar Interior, Solar Magnetic Field, Velocity Measurement

Scientific paper

Progress in the development of an instrument with very high (1:10 billion) wavelength stability designed to measure solar surface velocities and magnetic fields is reported. The instrument determines Doppler and Zeeman shifts in solar spectral lines by a 6-point weighted average. It is built around an electrically tunable solid lithium-niobate Fabry-Perot etalon that is stabilized against a diode laser which itself is locked to a resonance line of cesium 133. Key features are the etalon, which acts as a wide-angle 0.017-nm solar filter, the camera with a specially stabilized shutter, and the instrument control and data collection system. Use of the instrument in helioseismological research is emphasized.

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