Search Results - "Koehn, Alf"

Simulations of High Harmonic Fast Wave Heating on the C-2U Advanced Beam-Driven Field-Reversed Configuration Device by Yang, Xiaokang, Petrov, Yuri, Ceccherini, Francesco, Koehn, Alf, Galeotti, Laura, Dettrick, Sean, Binderbauer, Michl

“…Numerous efforts have been made at Tri-Alpha Energy (TAE) to theoretically explore the physics of microwave electron heating in field-reversed configuration…”
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Perturbing microwave beams by plasma density fluctuations by Köhn, Alf, Holzhauer, Eberhard, Leddy, Jarrod, Thomas, Matthew B., Vann, Roddy G. L.

“…The propagation of microwaves across a turbulent plasma density layer is investigated with full-wave simulations. To properly represent a fusion edge-plasma,…”
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The deteriorating effect of plasma density fluctuations on microwave beam quality by Köhn, Alf, Austin, Max E., Brookman, Michael W., Gentle, Kenneth W., Guidi, Lorenzo, Holzhauer, Eberhard, La Haye, Rob J., Leddy, Jarrod B., Maj, Omar, Petty, Craig C., Poli, Emanuele, Snicker, Antti, Thomas, Matthew B., Vann, Roddy G. L., Weber, Hannes

“…Turbulent plasma edge density fluctuations can broaden a traversing microwave beam degrading its quality. This can be a problem for scenarios relying on a high…”
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Full-Wave Simulations of the O-X-B Mode Conversion in a Realistic Experimental Geometry in the RFX-mod Device by Kohn, A., Bilato, R., Volpe, F., Paccagnella, R.

“…A full-wave code has been used to model the O-X-B mode-conversion process in RFX-mod. Parameter scans were performed to find the optimum launching condition…”
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Visualization of the O-X-B Mode Conversion Process With a Full-Wave Code by Kohn, A., Holzhauer, E., Stroth, U.

“…The O-X-B mode conversion is a process to couple electromagnetic waves into an overdense plasma. At the vicinity of the cutoff, the wave is converted into a…”
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Electron Bernstein Wave (EBW) current drive profiles and efficiency for STEP by Wilson, Thomas, Freethy, Simon, Henderson, Mark, Köhn-Seeman, Alf, Konoplev, Ivan, Saarelma, Samuli, Speirs, David, Vann, Roddy

“…GENRAY and CQL3D were used to estimate the Electron Bernstein Wave (EBW) current drive profiles and normalised current drive efficiency ζ CD (6) for several…”
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Microwave current drive for STEP and MAST Upgrade by Freethy, Simon, Figini, Lorenzo, Henderson, Mark, El-Haroun, Hana, Eliason, Bengt, Gibson, Sam, Kirov, Krassimir, Köhn-Seemann, Alf, Konoplev, Ivan, Saarelma, Samuli, Sharma, Ridhima, Speirs, David, Vann, Roddy, Webster, Helen, Wilson, Thomas

“…The UK’s Spherical Tokamak for Energy Production (STEP) reactor design program has recently taken the decision to use exclusively microwave-based heating and…”
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Benchmarking full-wave codes for studying the O-SX mode conversion in MAST Upgrade by Köhn-Seemann, Alf, Eliasson, Bengt E., Freethy, Simon J., Holland, Lou A., Vann, Roddy G.L.

“…Three full-wave codes for simulating microwave propagation and O-SX mode conversion in magnetized plasma are described and compared. Their feasibility to…”
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