On the criteria guiding the design of the upper electron-cyclotron launcher for ITER

On the criteria guiding the design of the upper electron-cyclotron launcher for ITER

Electron cyclotron waves injected from an antenna located in the upper part of the vessel will be employed in ITER to controlMHD instabilities, particularly neoclassical tearingmodes (NTMs). The derivation of the NTM stabilization criteria used up to now to guide the optimization of the launcher is...

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Main Authors: Poli E., Angioni C., Casson F. J., Farina D., Figini L., Goodman T. P., Maj O., Sauter O., Weber H., Zohm H., Saibene G., Henderson M. A.
Format: Article
Language:English
Published: EDP Sciences 2015-01-01
Series:EPJ Web of Conferences
Online Access:http://dx.doi.org/10.1051/epjconf/20158701008
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spelling doaj-60f9f9b1fd7d41a6b982b557266b25c72021-08-02T06:01:07ZengEDP SciencesEPJ Web of Conferences2100-014X2015-01-01870100810.1051/epjconf/20158701008epjconf_ec2015_01008On the criteria guiding the design of the upper electron-cyclotron launcher for ITERPoli E.0Angioni C.1Casson F. J.2Farina D.3Figini L.4Goodman T. P.5Maj O.6Sauter O.7Weber H.8Zohm H.9Saibene G.10Henderson M. A.11Max-Planck-Institut für PlasmaphysikMax-Planck-Institut für PlasmaphysikMax-Planck-Institut für PlasmaphysikIstituto di Fisica del Plasma CNR, EURATOM-ENEA-CNR AssociationIstituto di Fisica del Plasma CNR, EURATOM-ENEA-CNR AssociationCentre de Recherches en Physique des Plasmas, CRPP-EPFLMax-Planck-Institut für PlasmaphysikCentre de Recherches en Physique des Plasmas, CRPP-EPFLMax-Planck-Institut für PlasmaphysikMax-Planck-Institut für PlasmaphysikFusion for EnergyITER Organization Electron cyclotron waves injected from an antenna located in the upper part of the vessel will be employed in ITER to controlMHD instabilities, particularly neoclassical tearingmodes (NTMs). The derivation of the NTM stabilization criteria used up to now to guide the optimization of the launcher is reviewed in this paper and their range of validity elucidated. Possible effects leading to a deterioration of the predicted performance through a broadening of the EC deposition profile are discussed. The most detrimental effect will likely be the scattering of the EC beams from density fluctuations, resulting in a beam broadening in the 100% range. The combined impact of these effects with that of beam misalignment (with respect to the targeted surface) is discussed for a time slice of the standard Q = 10 H-mode scenario. http://dx.doi.org/10.1051/epjconf/20158701008
collection DOAJ
language English
format Article
sources DOAJ
author Poli E.
Angioni C.
Casson F. J.
Farina D.
Figini L.
Goodman T. P.
Maj O.
Sauter O.
Weber H.
Zohm H.
Saibene G.
Henderson M. A.
spellingShingle Poli E.
Angioni C.
Casson F. J.
Farina D.
Figini L.
Goodman T. P.
Maj O.
Sauter O.
Weber H.
Zohm H.
Saibene G.
Henderson M. A.
On the criteria guiding the design of the upper electron-cyclotron launcher for ITER
EPJ Web of Conferences
author_facet Poli E.
Angioni C.
Casson F. J.
Farina D.
Figini L.
Goodman T. P.
Maj O.
Sauter O.
Weber H.
Zohm H.
Saibene G.
Henderson M. A.
author_sort Poli E.
title On the criteria guiding the design of the upper electron-cyclotron launcher for ITER
title_short On the criteria guiding the design of the upper electron-cyclotron launcher for ITER
title_full On the criteria guiding the design of the upper electron-cyclotron launcher for ITER
title_fullStr On the criteria guiding the design of the upper electron-cyclotron launcher for ITER
title_full_unstemmed On the criteria guiding the design of the upper electron-cyclotron launcher for ITER
title_sort on the criteria guiding the design of the upper electron-cyclotron launcher for iter
publisher EDP Sciences
series EPJ Web of Conferences
issn 2100-014X
publishDate 2015-01-01
description Electron cyclotron waves injected from an antenna located in the upper part of the vessel will be employed in ITER to controlMHD instabilities, particularly neoclassical tearingmodes (NTMs). The derivation of the NTM stabilization criteria used up to now to guide the optimization of the launcher is reviewed in this paper and their range of validity elucidated. Possible effects leading to a deterioration of the predicted performance through a broadening of the EC deposition profile are discussed. The most detrimental effect will likely be the scattering of the EC beams from density fluctuations, resulting in a beam broadening in the 100% range. The combined impact of these effects with that of beam misalignment (with respect to the targeted surface) is discussed for a time slice of the standard Q = 10 H-mode scenario.
url http://dx.doi.org/10.1051/epjconf/20158701008
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