Predicting HHFW Heating Efficiency on NSTX via Whole-Device Full-Wave Simulation

摘要

We present a qualitative comparison of NSTX HHFW heating efficiency observations[ 1, 2] with results from the AORSA[3] whole-device, linear simulation. The simulation retains a realistic geometry and core plasma kinetic physics such that scrape-off plasma linear RF fields can be calculated. By examining L-mode and neutral beam heated H-mode scenarios we quantify the conditions that result in a fast-wave coaxial mode in the scrape-off plasma. These large amplitude coaxial modes are expected to damp on collisions or couple to non-linear damping mechanisms and be correlated to an observed drop in core heating efficiency.