Construction of magneto-otical filters and their application to solar observations.

Details Construction of magneto-otical filters and their application to solar observations. Construction of magneto-otical filters and their application to solar observations.

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993rnaoj...2..417m&link_type=abstract

Rep. Natl. Astron. Obs. Jpn., Vol. 2, No. 1, p. 417 - 429

Mathematics

Logic

Helioseismology

Scientific paper

The magneto-optical filter (MOF) is made of a transparent cell placed in a strong magnetic field. The cell contains the vapor of material like sodium. By utilizing the magneto-optical effect near the wavelength of a spectral line, MOF provides a very narrow and stable passband, which is particularly suitable for helioseimological observations. The cell becomes less transparent as it ages, and can only be used in observations for several months. The authors' aim was to construct a filter that can be continuously used for several years without losing the sodium vapor at the cell wall. This was achieved by heating the whole cell to about 200°C.

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