programwg2

Working Group 7: Particle acceleration and transport

Topic I: Signatures of particle acceleration before (pre-event), during (impulsive phase) and long after the flare.
Topic II: Observational constraints on accelerated particles (energetics, numbers of accelerated particles, spectral-index evolution, location and acceleration time).
Topic III: Is the role of magnetic topology important for the acceleration and transport of high energy particles?
Topic IV: What is the respective role of shocks, stochastic acceleration and direct E-fields on particle acceleration, with emphasis on the their interrelation to the energy release process (reconnection).
Topic V: To what extend do the limitations to our current observations determine the processes involved? Such observational limitations include not only size-scale issues (both on sub-resolution and large size scales) but also energy regimes to which observational access is difficult (nonthermal electrons at low energies in the presence of thermal plasma and ions below ~5MeV). Although the properties of these particles are virtually unobserved, they may still play a major role in the energetics and the energy release.

Wednesday AM II	G. Hurford-L. Vlahos: Brief presentation of Working group organization Topic I (High energy particles diagnostics) (Duration of the informal WG presentations 10-15 minutes) Brown "High energy particles diagnostics X-rays-Gamma-rays (preview of the invited talk)" Bastian "Radio diagnostics (preview of the invited talk)" Vilmer "Diagnostics and constains for high energy particle in solar flares" Lin "Flare acceleration diagnostics from space data" Discussion
Wednesday PM I	Topic I, II (Diagnostics and Constarains) White " Radio diagnostics: A study of specific examples" Mc Connell: "Hard X-ray Polarimetry with RHESSI" Kontar "Spectra of accelerated electrons: Constrains from inverted RHESSI X-ray spectra" Piana-Massone: "Inversion methods for analysis of RHESSI X-ray Spectra" Discussion
Wednesday PM II	Topic II (transport and high energy particle heating) Aschwanden: "Electron time-of flight measurments with RHESSI flares" Gordovskyy: "Return current and magnetic field convergence on heating the solar atmosphere" Discussion
Thursday AM II	Topic III (the role of magnetic topology in particle acceleration) Alexander: "Anisotropic particle injection in solar flares" Warmuth: " The role of the outflow termination shock in solar flares" Azner-Vlahos: "Force-free extrapolation of magnetic fields and particle accelerationand transport" Discussion
Thursday PM I	Topic III (the role of magnetic topology in particle acceleration), Alexander "The role of magnetic topology on particle transport" Zharkova: "Energy spectra of electrons and protons caused by different magnetic field topologies" Discussion
Thursday PM II	Topic IV (Joint session with WG2) Karlicky: "Particle acceleration in a collapsing magnetic trap" Mann "Generation of Energetic Electrons at the Reconnection Outflow Termination Shock" Somov: "Particle acceleration above the loop tops " Turkmani: "Particle acceleration in coronal loops" Discussion
Friday AM I	Pre-event, post-event particle acceleration and acceleration withought a flare (joint session with 1,2) Klein: "Radio emission from pre event and post event acceleration of electrons" Vilmer: "Pre event and post event X-ray emission" Lin: "Quite time particle acceleration" Discussion
Friday AM II	Reconnection and particle acceleration in the magnetosphere (Joint session with WG2)
Friday PM I	Topic V TBA
Friday PM II	Topic V Summary discussion- All participants