Large Field-of-View KD*P Modulator for Solar Polarization Measurements

Details Large Field-of-View KD*P Modulator for Solar Polarization Measurements Large Field-of-View KD*P Modulator for Solar Polarization Measurements

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aspc..358..209w&link_type=abstract

Solar Polarization 4, ASP Conference Series, Vol. 358, Proceedings of the conference held 19-23 September, 2005, in Boulder, Col

Physics

Scientific paper

This paper describes the evolution of the Marshall Space Flight Center's (MSFC) electro-optical polarimeter with emphasis on the field-of-view characteristics of the KD*P modulator. Understanding those characteristics was essential to the success of the MSFC solar vector magnetograph. We show how the field-of-view (FOV) errors of KD*P look similar to the linear polarization patterns seen in simple sunspots, and why the placement of the KD*P in a collimated beam was essential in separating the instrumental polarization from the solar signal. Finally, we describe a modulator design which minimizes those FOV errors.

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