Integrated Particle Transport Simulation of NBI Plasmas in LHD

摘要

The integrated simulation code for helical plasmas, TASK3D, is improved to solve the particle transport equation and has been applied to the neutral beam injection (NBI) plasma of LHD. To solve the particle transport equation we consider two types of particle sources: ionization of neutral particles of the recycling neutral gas and ionization of neutral beams by NBI heating. The neutral particle transport code, AURORA, has been incorporated to calculate the recycling neutral particles, and the particle source by the recycling neutral gas has been evaluated. The particle source by the NBI heating neutral beam has been evaluated by FIT3D code. A particle transport simulation with three turbulent transport models has been performed. We find that the experimental results agree well with the constant turbulent transport model. The heat and particle transport simulation have also been performed to be compared with the LHD experimental plasma with different densities. The TASK3D simulation results show good agreements with experimental data.