HHFW Heating in the WHAM Device

Ion heating in the Wisconsin HTS Axisymmetric Machine (WHAM) will be done via the injection of High Harmonic Fast Waves (HHFW) designed to damp at the turning points of fast ions injected via neutral beams. Preferential damping on the beam injected ions is due to their larger Larmor orbits when compared to thermal ions. This process gives rise to a sloshing ion distribution which helps electrostatically confine a warm plasma at the center of the device. The warm plasma in the center helps with kinetic stability. This approach is expected to yield a reaction rate of 5x10^{11}n/s using 100% D. We present the latest simulation results done via Genray/CQL3D on the WHAM device as well as a potential next step volumetric neutron source (WHAM-VNS).