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The impulsive hard x-rays from solar flares
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Leach, J. |
| Copyright Year | 1984 |
| Description | A technique for determining the physical arrangement of a solar flare during the impulsive phase was developed based upon a nonthermal model interpretation of the emitted hard X-rays. Accurate values are obtained for the flare parameters, including those which describe the magnetic field structure and the beaming of the energetic electrons, parameters which have hitherto been mostly inaccessible. The X-ray intensity height structure can be described readily with a single expression based upon a semi-empirical fit to the results from many models. Results show that the degree of linear polarization of the X-rays from a flaring loop does not exceed 25 percent and can easily and naturally be as low as the polarization expected from a thermal model. This is a highly significant result in that it supersedes those based upon less thorough calculations of the electron beam dynamics and requires that a reevaluation of hopes of using polarization measurements to discriminate between categories of flare models. |
| File Size | 11462182 |
| Page Count | 296 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19840013412 |
| Archival Resource Key | ark:/13960/t51g5j60h |
| Language | English |
| Publisher Date | 1984-02-01 |
| Access Restriction | Open |
| Subject Keyword | Solar Physics Solar X-rays Solar Flares Bremsstrahlung Fokker-planck Equation Linear Polarization Radiant Flux Density Electron Acceleration Energetic Particles Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
