This title appears in the Scientific Report :
2010
Please use the identifier:
http://dx.doi.org/10.1088/0741-3335/52/10/104006 in citations.
Real-time control of tearing modes using a line-of-sight electron cyclotron emission diagnostic
Real-time control of tearing modes using a line-of-sight electron cyclotron emission diagnostic
The stability and performance of tokamak plasmas are limited by instabilities such as neoclassical tearing modes. This paper reports on an experimental proof of principle of a feedback control approach for real-time, autonomous suppression and stabilization of tearing modes in a tokamak. The system...
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Personal Name(s): | Hennen, B.A. |
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Westerhof, E. / Nuij, P.W.J.M. / Oosterbeek, J.W. / de Maar, M.R. / Bongers, W.A. / Bürger, A. / Thoen, A. / Steinbuch, D. / TEXTOR, Team. | |
Contributing Institute: |
Plasmaphysik; IEK-4 |
Published in: | Plasma physics and controlled fusion, 52 (2010) S. 104006 |
Imprint: |
Bristol
IOP Publ.
2010
|
Physical Description: |
104006 |
DOI: |
10.1088/0741-3335/52/10/104006 |
Document Type: |
Journal Article |
Research Program: |
Fusion |
Series Title: |
Plasma Physics and Controlled Fusion
52 |
Subject (ZB): | |
Publikationsportal JuSER |
The stability and performance of tokamak plasmas are limited by instabilities such as neoclassical tearing modes. This paper reports on an experimental proof of principle of a feedback control approach for real-time, autonomous suppression and stabilization of tearing modes in a tokamak. The system combines an electron cyclotron emission diagnostic for sensing of the tearing modes in the same sight line with a steerable electron cyclotron resonance heating and current drive (ECRH/ECCD) antenna. A methodology for fast detection of q = m/n = 2/1 tearing modes and retrieval of their location, rotation frequency and phase is presented. Set-points to establish alignment of the ECRH/ECCD deposition location with the centre of the tearing mode are generated in real time and forwarded in closed loop to the steerable launcher and as a modulation pulse train to the gyrotron. Experimental results demonstrate the capability of the control system to track externally perturbed tearing modes in real time. |