Notes on the filter magnetograph project

Details Notes on the filter magnetograph project Notes on the filter magnetograph project

Nov 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996spie.2804...18k&link_type=abstract

Proc. SPIE Vol. 2804, p. 18-21, Missions to the Sun, David M. Rust; Ed.

Computer Science

Scientific paper

A simple design is proposed for a filter magnetograph, based on the bichromatic image method using magneto-optic filter. The scheme ensures an optimal harnessing of the light flux and the computer memory. A push-pull modulation, utilized in the instrument, is readily adjusted to CCD operating in the mode of a two-step image detector. There is good reason to hope that the signal/noise ratio can be improved considerably. In whole disk observations the magnetograph provides measurements of the general magnetic field simultaneously with a usual magnetogram. The possibility that the proposed magnetograph can be operated in the mode of measuring the steepness of the spectral line wing, is considered. This would contribute, in these authors' opinion, to more reliable calibration of conventional filter magnetograms as well as aiding a more correct evaluation of the integral magnetic field flux in areas of the image with a transverse field and mixed polarity.

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