@inproceedings{da411246e1b0403990872a976f314088,
title = "Real time MHD mode control using ECCD in KSTAR: Plan and requirements",
abstract = "For a high-performance, advanced tokamak mode in KSTAR, we have been developing a real-time control system of MHD modes such as sawtooth and Neo-classical Tearing Mode (NTM) by ECH/ECCD. The active feedback control loop will be also added to the mirror position and the real-time detection of the mode position. In this year, for the stabilization of NTM that is crucial to plasma performance we have implemented open-loop ECH antenna control system in KSTAR Plasma Control System (PCS) for ECH mirror movement during a single plasma discharge. KSTAR 170 GHz ECH launcher which was designed and fabricated by collaboration with PPPL and POSTECH has a final mirror of a poloidally and toroidally steerable mirror. The poloidal steering motion is only controlled in the real-time NTM control system and its maximum steering speed is 10 degree/sec by DC motor. However, the latency of the mirror control system and the return period of ECH antenna mirror angle are not fast because the existing launcher mirror control system is based on PLC which is connected to the KSTAR machine network through serial to LAN converter. In this paper, we present the design of real time NTM control system, ECH requirements, and the upgrade plan.",
keywords = "ECH, KSTAR, NTM, Real time control, Steerable Mirror, Suppression",
author = "M. Joung and Woo, {M. H.} and Jeong, {J. H.} and Hahn, {S. H.} and Yun, {S. W.} and Lee, {W. R.} and Bae, {Y. S.} and Oh, {Y. K.} and Kwak, {J. G.} and Yang, {H. L.} and W. Namkung and H. Park and Cho, {M. H.} and Kim, {M. H.} and Kim, {K. J.} and Na, {Y. S.} and J. Hosea and R. Ellis",
year = "2014",
doi = "10.1063/1.4864599",
language = "English",
isbn = "9780735412101",
series = "AIP Conference Proceedings",
publisher = "American Institute of Physics Inc.",
pages = "506--509",
booktitle = "Radiofrequency Power in Plasmas - Proceedings of the 20th Topical Conference",
note = "20th Topical Conference on Radiofrequency Power in Plasmas ; Conference date: 25-06-2013 Through 28-06-2013",
}
