Solar vector magnetic field research

Details Solar vector magnetic field research Solar vector magnetic field research

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jhu..reptq....r&link_type=abstract

Final Report, 1 Dec. 1989 - 31 Mar. 1993 Johns Hopkins Univ., Laurel, MD. Applied Physics Lab.

Physics

Magnetic Flux, Magnetic Signatures, Solar Flares, Solar Instruments, Solar Magnetic Field, Balloon-Borne Instruments, Image Motion Compensation, Solar Physics

Scientific paper

The objective of the project was to measure the magnetic fields in solar active regions, develop methods for predicting solar flares on the basis of the measurements, and improve the instrumentation for solar magnetic field measurements. In cooperation with the staff at the Solar Branch of the USAF Phillips Laboratory, field measurements were made almost daily during the grant period. The principal result of analyses carried out so far is that so-called sheared magnetic fields are neither necessary nor sufficient for solar flaring. The crucial element seems to be emerging magnetic flux and local development of shear in the hour before flare onset. A need for greatly improved instrumentation was identified. A new vector magnetograph was designed for operation above the image-degrading layers of the atmosphere. Fourteen technical publications and presentations appeared under grant sponsorship.

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