Abstract
The Monte Carlo simulation based on test particle representation has an advantage of appropriately treating the edge plasma transport in the three-dimensional field line structure containing island and ergodic zones [4]. We trace the orbits of the guiding centers of the test particles in the fixed magnetic field under the effects of the Coulomb collision in order to numerically observe the distribution of the guiding centers in the configuration space [4-6]. By tracing the orbits, the strike point pattern on the LID head can be numerically observed. Here, the vacuum magnetic field is used to calculate the orbits, the magnetic axis is located at R0 = 3.6 m, and the strength of magnetic field at the axis is B0 = 3 T. Let us assume that 1) the test particles are monoenergetic protons with Et = 300 eV, 2) the distribution of the initial pitch angles of the particles is uniform, and 3) the Maxwellian background plasma is uniform in the edge region including the island. We assume that the pitch angle scattering is dominant compared with the other effects of the collisions, and neglect the effects of the electric field. We also assume
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