@article{7228,
  author = {B.A. Hennen and E. Westerhof and Pwjm Nuij and J. W. Oosterbeek and M.R. de Baar and W. A. Bongers and A. Burger and D. J. Thoen and M. Steinbuch},
  title = {Real-time control of tearing modes using a line-of-sight electron cyclotron emission diagnostic},
  abstract = {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.},
  year = {2010},
  journal = {Plasma Physics and Controlled Fusion},
  volume = {52},
  number = {10},
  pages = {20},
  month = {Oct},
  isbn = {0741-3335},
  url = {<Go to ISI>://000283391000008 },
  note = {ISI Document Delivery No.: 670AFTimes Cited: 0Cited Reference Count: 24},
  language = {English},
}