The physics performance of the front steering launcher for the ITER ECRH upper port

M. Henderson, R. Chavan, P. Nikkola, G. Ramponi, G. Saibene, F. Sanchez, O. Sauter, H. Shidara, H. Zohm

Research output: Contribution to conferencePaper

Abstract

The capability of any given e.m.-wave plasma heating system to be utilized for physics applications depends strongly on the technical properties of the launching antenna (or launcher). An effective ECH launcher must project a small mm-wave beam spot size far into the plasma and 'steer' the beam across a large fraction of the plasma cross section (along the resonance surface). Thus the choice in the launcher concept and design may either severely limit or enhance the capability of a heating system to be effectively applied for physics applications, such as sawtooth stabilization, control of the Neoclassical Tearing Mode (NTM), Edge Localized Mode (ELM) control, etc. Presently, two antenna concepts are under consideration for the ITER upper port ECH launcher: front steering (FS) and remote steering (RS) launchers. The RS launcher has the technical advantage of easier maintenance access to the steering mirror, which is isolated from the torus vacuum. The FS launcher places the steering mirror near the plasma increasing the technical challenges, but significantly enhancing the focusing and steering capabilities of the launcher, offering a threefold increase in NTM stabilization efficiency over the RS launcher as well as the potential for application to other critical physics issues such as ELM or sawtooth control. © 2005 American Institute of Physics.
Original languageEnglish
DOIs
Publication statusPublished - 26 Sep 2005
Externally publishedYes
EventRADIO FREQUENCY POWER IN PLASMAS: 16th Topical Conference on Radio Frequency Power in Plasmas - , United States
Duration: 26 Sep 2005 → …

Conference

ConferenceRADIO FREQUENCY POWER IN PLASMAS: 16th Topical Conference on Radio Frequency Power in Plasmas
CountryUnited States
Period26/9/05 → …

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Henderson, M., Chavan, R., Nikkola, P., Ramponi, G., Saibene, G., Sanchez, F., ... Zohm, H. (2005). The physics performance of the front steering launcher for the ITER ECRH upper port. Paper presented at RADIO FREQUENCY POWER IN PLASMAS: 16th Topical Conference on Radio Frequency Power in Plasmas, United States. https://doi.org/10.1063/1.2098427