We present a method to derive important model parameters for
stochastic acceleration of particles by turbulence in solar flares
using the electron flux spectral images. We are applying this method
to a few RHESSI flares that have simultaneous hard X-ray emission from
the loop top and the footpoint regions.
Participants: Qingrong Chen, Vahe Petrosian
Project Status: One paper submitted to ApJL and more work in progress.