The Stable Solar AnalyzerProgress 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.
Document ID
19890016487
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Rust, D. M. (Johns Hopkins Univ. Laurel, MD., United States)
Appourchaux, T. (Centre National de la Recherche Scientifique Verrieres-Le Buisson, France)
Date Acquired
September 6, 2013
Publication Date
December 1, 1988
Publication Information
Publication: ESA, Seismology of the Sun and Sun-Like Stars