19 October 1977 A Near-Infrared Coronal Emission-Line Polarimeter
Author Affiliations +
Abstract
The direction, but not the magnitude, of the solar coronal magnetic field is encoded in the linear polarization of certain coronal emission lines. The High Altitude Observatory, in collaboration with the Sacramento Peak Observatory, has constructed a polarimeter which measures the plane polarization of the 10747A and 10798A Fe XIII emission lines. The instrument simultaneously provides similar measurements of the continuum corona and the sky at 10690A to give the net emission line intensity and polarization. Polarization brightness maps made with the 10747A line clearly show the large scale organization of the coronal magnetic field and signatures characteristic of diverging fields over sunspots, horizontal fields above filament channels, and the Van Vleck turnover in helmet streamers.
© (1977) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
C. W. Querfeld, C. W. Querfeld, } "A Near-Infrared Coronal Emission-Line Polarimeter", Proc. SPIE 0112, Optical Polarimetry: Instrumentation and Applications, (19 October 1977); doi: 10.1117/12.955564; https://doi.org/10.1117/12.955564
PROCEEDINGS
9 PAGES


SHARE
RELATED CONTENT

Hertz: an imaging polarimeter
Proceedings of SPIE (July 30 1998)
Calibration of a ground-based solar coronal polarimeter
Proceedings of SPIE (February 13 2003)
The chromosphere and prominence magnetometer
Proceedings of SPIE (September 23 2012)
Solar EUV/FUV line polarimetry: instruments and methods
Proceedings of SPIE (January 31 1991)

Back to Top