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

E. Poli, C. Angioni, F.J. Casson, D. Farina, L. Figini, T.P. Goodman, O. Maj, O. Sauter, H. Weber, H. Zohm, G. Saibene, M.A. Henderson

Research output: Contribution to conferencePaper

Abstract

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.
Original languageEnglish
DOIs
Publication statusPublished - 12 Mar 2015
Externally publishedYes
Event18th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, EC 2014 - Nara, Japan
Duration: 12 Mar 2015 → …

Conference

Conference18th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, EC 2014
CountryJapan
CityNara
Period12/3/15 → …

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Poli, E., Angioni, C., Casson, F. J., Farina, D., Figini, L., Goodman, T. P., ... Henderson, M. A. (2015). On the criteria guiding the design of the upper electron-cyclotron launcher for ITER. Paper presented at 18th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, EC 2014, Nara, Japan. https://doi.org/10.1051/epjconf/20158701008