Problems and Progress in Flare Fast Particle Diagnostics

Abstract

Recent progress in the diagnosis of flare fast particles is critically discussed with the main emphasis on high resolution Hard X-Ray (HXR) data from RHESSI and coordinated data from other instruments. Spectacular new photon data findings are highlighted as are advances in theoretical aspects of their use as fast particle diagnostics, and some important comparisons made with interplanetary particle data. More specifically the following topics are addressed (a) RHESSI data on HXR (electron) versus gamma-ray line (ion) source locations. (b) RHESSI hard X-ray source spatial structure in relation to theoretical models and loop density structure. (c) Energy budget of flare electrons and the Neupert effect. (d) Spectral deconvolution methods including blind target testing and results for RHESSI HXR spectra, including the reality and implications of dips inferred in electron spectra (e) The relation between flare in-situ and interplanetary particle data.

15 pages, 13 figures, submitted to Advances in Space Research

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• Nonlinear development of electron-beam-driven weak turbulence in an inhomogeneous plasma
• Generalized Regularization Techniques With Constraints For The Analysis Of Solar Bremsstrahlung X-Ray Spectra
• Determination Of Electron Flux Spectra In A Solar Flare With An Augmented Regularization Method: Application To Rhessi Data
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Cited by in corpus (7)

• Solar wind density turbulence and solar flare electron transport from the Sun to the Earth
• Parallel electric field generation by Alfven wave turbulence
• Acceleration, magnetic fluctuations and cross-field transport of energetic electrons in a solar flare loop
• Onsets and spectra of impulsive solar energetic electron events observed near the Earth
• Sub-THz radiation mechanisms in solar flares
• Turbulent cross-field transport of non-thermal electrons in coronal loops: theory and observations
• Physics of collisionless phase mixing