An imaging vector magnetograph for the next solar maximum

Details An imaging vector magnetograph for the next solar maximum An imaging vector magnetograph for the next solar maximum

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988fnsm.work...81c&link_type=abstract

In NASA, Goddard Space Flight Center, Max 1991: Flare Research at the Next Solar Maximum. Workshop 1: Scientific Objectives p 81

Physics

Equipment Specifications, Magnetic Signatures, Solar Magnetic Field, Solar Maximum Mission-A, X Ray Imagery, Heating, Particle Acceleration, Solar Flares, Spatial Resolution, Telescopes, Temporal Resolution

Scientific paper

Measurements of the vector magnetic field in the solar atmosphere with high spatial and temporal resolution over a large field of view are critical to understanding the nature and evolution of currents in active regions. Such measurements, when combined with the thermal and nonthermal X-ray images from the upcoming Solar-A mission, will reveal the large-scale relationship between these currents and sites of heating and particle acceleration in flaring coronal magnetic flux tubes. The conceptual design of an imaging vector magnetograph that combines a modest solar telescope with a rotating quarter-wave plate, an acousto-optical tunable prefilter as a blocker for a servo-controlled Fabry-Perot etalon, CCD cameras, and a rapid digital tape recorder are described. Its high spatial resolution (1/2 arcsec pixel size) over a large field of view (4 x 5 arcmin) will be sufficient to significantly measure, for the first time, the magnetic energy dissipated in major solar flares. Its millisecond tunability and wide spectra range (5000 to 8000 A) enable nearly simultaneous vector magnetic field measurements in the gas-pressure-dominated photosphere and magnetically dominated chromosphere, as well as effective co-alignment with Solar-A's X-ray images.

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