Particle acceleration during magnetic reconnection is a long-standing topic in space, solar and astrophysical plasmas. Recent 3D particle-in-cell simulations of show that particles can leave flux ropes due to field-line chaos, allowing access additional sites, gain more energy through Fermi acceleration, develop power-law distribution. This effect does not exist traditional 2D simulations, wher...

The adiabatic invariance of the magnetic moment during particle motion is fundamental importance to dynamics magnetized plasma. related rate pitch angle scattering investigated here for fast particles that thermally stream through static perturbations. For a uniform field with localized perturbation it found curvature parameter $\kappa^2=\min(R_c/\rho_L)$ does not predict level scattering. Inst...

We study the non-thermal emissions in a solar flare occurring on 2003 May 29 by using RHESSI hard X-ray (HXR) and Nobeyama microwave observations. This flare shows several typical behaviors of the HXR and microwave emissions: time delay of microwave peaks relative to HXR peaks, loop-top microwave and footpoint HXR sources, and a harder electron energy distribution inferred from the microwave sp...