A. M. MASSONE

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We address an important inverse problem in solar plasma physics by means of an 'ad hoc' imple- mentation of the Tikhonov regularization method. Our approach is validated in the case of different modifications of the mathematical model of the problem based on physical motivations, and for data sets obtained with synthetic experiments. Finally,...

The Ramaty High Energy Solar Spectroscopic Imager (RHESSI) mission provides high resolution X-ray spectra emitted by collisional bremsstrahlung of electrons with the ions of the plasma. One of the aims of the mission is to infer information about the acceleration and transport mechanisms of electrons and ions in solar flares. Within the...

Using RHESSI hard X-ray imaging spectroscopy observations, we analyze electron flux maps for a number of extended coronal loop flares. For each event, we fit a collisional model with an extended acceleration region to the observed variation of loop length with electron energy E, resulting in estimates of the plasma density in, and longitudinal...

We explore the use of centroid coordinates as a means to identify the "locations" of electron–proton bremsstrahlung hard X-ray sources in solar flares. Differences between the coordinates of the electron and photon cen- troids are derived and explained. For electron propagation in a collision-dominated target, with either a uni- form or an...