Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Köhn, Alf"'
Autor:
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, Rhodes, Terry L., 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 spatial localization of the deposition of injected microwave power, like controlling MHD i
Externí odkaz:
http://arxiv.org/abs/1805.09594
Autor:
Köhn, Alf, Guidi, Lorenzo, Holzhauer, Eberhard, Maj, Omar, Poli, Emanuele, Snicker, Antti, Weber, Hannes
Publikováno v:
A K\"ohn et al 2018 Plasma Phys. Control. Fusion 60 075006
Plasma turbulence, and edge density fluctuations in particular, can under certain conditions broaden the cross-section of injected microwave beams significantly. This can be a severe problem for applications relying on well-localized deposition of th
Externí odkaz:
http://arxiv.org/abs/1712.03751
Autor:
Thomas, Matthew B, Brookman, Michael W, Austin, Max E, Köhn, Alf, La Haye, Robert J, Leddy, Jarrod B, Vann, Roddy G L, Yan, Zheng
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 the ECRH deposition profile have been taken in three operating scenari
Externí odkaz:
http://arxiv.org/abs/1710.03028
Publikováno v:
EPJ Web of Conferences 147, 01001 (2017)
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 is considered based on the Hasegawa-Wakatani model. Scattering and bro
Externí odkaz:
http://arxiv.org/abs/1703.05182
It is not fully understood how electromagnetic waves propagate through plasma density fluctuations when the size of the fluctuations is comparable with the wavelength of the incident radiation. In this paper, the perturbing effect of a turbulent plas
Externí odkaz:
http://arxiv.org/abs/1604.00344
Autor:
Köhn, Alf, Jacquot, Jonathan, Bongard, Michael W., Gallian, Sara, Hinson, Edward T., Volpe, Francesco A.
Publikováno v:
Phys. Plasmas 18, 082501 (2011)
The ordinary-extraordinary (O-X) mode conversion is modeled with the aid of a 2D full-wave code in the Pegasus Toroidal Experiment as a function of the launch angles. It is shown how the shape of the plasma density profile in front of the antenna can
Externí odkaz:
http://arxiv.org/abs/1104.0743
Autor:
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
Publikováno v:
EPJ Web of Conferences, Vol 203, p 01005 (2019)
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 spatial localization of the deposition of injected microwave power, like controlling MHD
Externí odkaz:
https://doaj.org/article/fe70acd425314d279b20e3da015b3d85
Autor:
Solano Piedra, Ricardo, Garro Vargas, Andreína, Jiménez Vargas, Diego, Meneses Rojas, Esteban, Köhn, Alf, Coto Vílchez, Federico, Vargas Blanco, Víctor Iván, Rojas Quesada, M.A., López Rodríguez, Luis Daniel, Sánchez Castro, J., Asenjo, José, Mora, Jonathan
Publikováno v:
Repositorio CONARE
Consejo Nacional de Rectores
instacron:CONARE
Consejo Nacional de Rectores
instacron:CONARE
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::98a9922b3ae9c17745d9f82afa459e9b
Autor:
Poli, E., Laqua, H., Oosterbeek, J., 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
Publikováno v:
EPJ Web of Conferences; 2019, Vol. 203, pN.PAG-N.PAG, 6p
Autor:
Köhn, Alf
The generation and heating of plasmas by means of microwaves is a widely-used method. This is the case for high-temperature fusion plasmas as well as for low-temperature plasmas. In fusion plasmas, the absorption of the microwave is well understood:
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e5b75cc9c2ec75af2cdd8c37b196d784