Experiment to Determine Accurately the Polarization and Intensity of the Light from the Solar Corona.
Abstract
Kellogg and Ney presented a theory that the solar corona may consist of charged particles trapped on a solar magnetic field. In order to test the possibility that synchrotron radiation in the visible might be detected from the solar corona, equipment has been constructed which measures the absolute intensity of polarized and unpolarized light from the corona, at wavelengths of 4500 A and 8500 A. It consists essentially of television cameras attached to telescopes, using photomultipliers as detectors. The accuracy of the equipment is such that the absolute intensities of polarized and unpolarized light from the corona may be measured to 5%, and the direction of the polarization angle may be measured to an accuracy of ~0.8 deg. This equipment was successfully used on two sites in the Sahara Desert to measure the polarization of the corona during the eclipse of October 2,1959. At each of these two sites, successful data were obtained for five complete scans of the corona in each color of light. Results are presented in the accompanying paper by Ney, Kellogg and Huch (p. 352). This research was supported by the ONR, the NSF, and the NASA.
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