21 citations · 48 across the 7 of their papers we have counts for
7 papers · 1 filter
Resolving ECRH deposition broadening due to edge turbulence in DIII-D by heat deposition measurement
Michael W Brookman, Matthew B Thomas, Jarrod Leddy +7
Interaction between microwave power, used for local heating and mode control, and density fluctuations can produce a broadening of the injected beam, as confirmed in experiment and…
Resolving ECRH deposition broadening due to edge turbulence in DIII-D by 3D full-wave simulations
Matthew B Thomas, Michael W Brookman, Max E Austin +5
Edge plasma density fluctuations are shown to have a significant effect on the electron cyclotron resonance heating (ECRH) beam in the DIII-D tokamak. Experimental measurements of…
Overdense microwave plasma heating in the CNT stellarator
K. C. Hammond, R. R. Diaz-Pacheco, A. Koehn +2
Overdense plasmas have been attained with 2.45 GHz microwave heating in the low-field, low-aspect-ratio CNT stellarator. Densities higher than four times the ordinary (O) mode cuto…
Perturbing microwave beams by plasma density fluctuations
Alf Köhn, Eberhard Holzhauer, Jarrod Leddy +2
The propagation of microwaves across a turbulent plasma density layer is investigated with full-wave simulations. To properly represent a fusion edge-plasma, drift-wave turbulence…
Kinetic simulations of X-B and O-X-B mode conversion and its deterioration at high input power
A. V. Arefiev, I. Y. Dodin, A. Köhn +4
Spherical tokamak plasmas are typically overdense and thus inaccessible to externally-injected microwaves in the electron cyclotron range. The electrostatic electron Bernstein wave…
Kinetic simulations of X-B and O-X-B mode conversion
A. V. Arefiev, E. J. Du Toit, A. Köhn +3
We have performed fully-kinetic simulations of X-B and O-X-B mode conversion in one and two dimensional setups using the PIC code EPOCH. We have recovered the linear dispersion rel…
Propagation in 3D of microwaves through density perturbations
T. R. N. Williams, A. Köhn, M. R. O'Brien +1
Simulations using 3D and 2D full-wave codes have shown that edge filaments in tokamak plasmas can significantly affect the propagation of microwaves across a broad frequency spectr…