SIXTH RHESSI WORKSHOP
Paris, France
April 4-8, 2006

Group 5: Theoretical Implications


Group Leader:
Loukas Vlahos
Depatment of Physics, University of Thessaloniki,
54124 Thessaloniki, Greece
vlahos@astro.auth.gr



Registered Members
Sumarry
Group 5 will focus on the outline of the constrains put forward by the analysis of the RHESSI data to the models for particle acceleration. The second goal of this group is to correlate the existing MHD models for Flares and CMEs with the kinetic aspects of particle acceleration and propagation.

Group Schedule
(to be updated)
Wednesday, April 5

0:900-10:30 Plenary Session
10:30-11:00
 Coffee
11:00-13:00
 Discussion on the goals of the group (L. Vlahos)
What can we tell the theorists? (G. Emslie)
On the Relation of the Coronal Source and the Footpoints (A. Benz)
Model-independent inferring of electron distributions from X-ray spectrum (E. Kontar)
13:00-14:30
 Lunch
14:30-18:00

X-ray signatures of coronal turbulence and intermittency, and in common mechanisms between particle acceleration and small-scale coronal heating (E. Buchlin)

Acceleration of particles in solar flares: linking the magnetic energy release and the acceleration processes (Cyril  Dauphin)

Ranndom motion in random electric fields (K. Arzner)






Thursday, April 6
9:00-10:30
Comparison of electron stochastic acceleration models with RHESSI hard X-ray observations of solar flares (P. Grizis)

Acceleration of electrons through test particle simulations in electric fields generated by 3D magnetic reconnection (Marco Onofri)
10:30-11:00
 Coffee
11:00-13:00
 Electron acceleration at the reconnection outflow shock
by Mann, Warmuth, and Aurass


Electron acceleration at DC electric fields in the corona
(by Oenel and Mann)



Discussion special aspects on Magnetic topology, reconnection and acceleration and the predictions from theory (Gordon Emslie, Valentina Zharkova, Pascal Demoulin, Loukas Vlahos)
13:00-14:30
 Lunch
14:30-16:00
 TBD
16:00-16:30 Coffee
16:30-18:00
 Common session with WG 4 and 3: (i) tight correlation between spectral hardness and total flux(ii) the 'challenge' of the high electron fluxes implied by HXR intensities and the small footpoint sizes; implications for beam physics, return currents, electron number flux and resupply etc.



Friday, April  7
9:00-10:300
 TBD
10:30-11:00
 Coffee
11:00-13:00
 Common session with WG-2: Constrains on theories of particle acceleration from  Ion acceleration and Interaction
12:30-14:00
 Lunch
14:30-16:00
 Common session with WG-1: observational and theoretical constraints on particle acceleration
mechanisms
16:00-16:30
 Coffee
16:30-10:00
 Plans for future studies