Physics
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sm22a08m&link_type=abstract
American Geophysical Union, Spring Meeting 2001, abstract #SM22A-08
Physics
7524 Magnetic Fields, 7835 Magnetic Reconnection, 7843 Numerical Simulation Studies
Scientific paper
Results from the Swarthmore Spheromak Experiment (SSX) indicate that formation and partial merging of two spheromak plasmas can be described well by a magnetohydrodynamic (MHD) picture in which there is substantial evolution towards force free states within each vessel, while reconnection activity, also described reasonably well by MHD, occurs in the region of interaction. MHD simulations (Lukin et al, Phys. Plasmas, 2001) support and provide further detail to this interpretation. In the present study, test particle equations are integrated using MHD data from SSX simulations to further understand the energetic particle fluxes that are observed experimentally. The test particle simulation is run with dimensionless parameters similar to the experiment, and particles are permitted to escape when they encounter the simulated SSX boundaries. MHD activity related to reconnection is responsible for accelerating charged particles. The process includes two phases -- a strong but short duration direct acceleration in the quasi-steady reconnection electric field, and a weaker longer lived stochastic component associated with turbulence. (Research supported by the USDOE under grant ER54490, and by NSF under grant ATM-9713595)
Brown Richard M.
Lukin Vyacheslav S.
Matthaeus William H.
Qin Gan
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