A new spectro-polarimeter for solar prominence and filament magnetic field measurements

David F. Elmore; Roberto Casini; Greg L. Card; Marc Davis; Alice Lecinski; Ron Lull; Peter G. Nelson; Steven Tomczyk

doi:10.1117/12.789556

9 July 2008 A new spectro-polarimeter for solar prominence and filament magnetic field measurements

David F. Elmore, Roberto Casini, Greg L. Card, Marc Davis, Alice Lecinski, Ron Lull, Peter G. Nelson, Steven Tomczyk

Proceedings Volume 7014, Ground-based and Airborne Instrumentation for Astronomy II; 701416 (2008) https://doi.org/10.1117/12.789556
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

Abstract

We are constructing a spectro-polarimeter using the 40-cm coronagraph at the Evans Solar Facility of the National Solar Observatory in Sunspot, NM for the purpose of measuring the vector magnetic field in prominences and filaments. The Prominence Magnetometer (ProMag) is comprised of a polarization modulation package and a spectrograph. The modulation optics are located at the prime focus of the coronagraph along with calibration optics and a beamsplitter that creates two beams of orthogonal Stokes states. The spectrograph resides at the coude focus of the coronagraph. The polarizations of the two chromospheric lines of neutral helium, at 587.6 nm and 1083.0 nm, are to be observed simultaneously. We present details of the design of the spectro-polarimeter.

Citation Download Citation

David F. Elmore, Roberto Casini, Greg L. Card, Marc Davis, Alice Lecinski, Ron Lull, Peter G. Nelson, and Steven Tomczyk "A new spectro-polarimeter for solar prominence and filament magnetic field measurements", Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 701416 (9 July 2008); https://doi.org/10.1117/12.789556

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