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Title: Design of ECH launcher for KSTAR advanced Tokamak operation

Journal Article · · Fusion Engineering and Design
 [1];  [1];  [1]; ORCiD logo [1];  [1]; ORCiD logo [1];  [2];  [1];  [3]
  1. National Fusion Research Institute, Daejeon (Korea, Republic of)
  2. Ulsan National Institute of Science and Technology, Ulsan (Korea, Republic of)
  3. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
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For the advanced tokamak operation in Korea Superconducting Tokamak Advanced Research (KSTAR), up to 6 MW of electron cyclotron heating (ECH) is planned. The ECH launcher should be able to operate in steady state and serve as a central/off-axis heating and current drive, q-profile control, and control of the neoclassical tearing mode (NTM) and sawtooth. The water cooled launchers have been upgraded to include continuous operation with precise, high-speed real-time control of the beams by integration with the plasma control system (PCS) for supporting the experiments, in particular for suppressing NTM. Here, the launcher was successfully operated for 78 s with about 650 kW EC power, where the temperature of the coolant, with a flow rate of 9.6 lpm, is saturated and approximately 2 °C. The launcher control system had a maximum control cycle of 5 kHz and a motor latency of about 10 ms, and the poloidal scanning speed of the beam was 20 °/s. Additionally, for the higher localization of power deposition, the curvature and size of the mirrors in the launcher were optimized. This paper presents the ECH launcher design and its control system with the operation results.

Research Organization:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Organization:
USDOE
OSTI ID:
1658824
Journal Information:
Fusion Engineering and Design, Vol. 151; ISSN 0920-3796
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

References (11)

Intrinsic rotation reversal, non-local transport, and turbulence transition in KSTAR L-mode plasmas journal May 2017
Modification of argon impurity transport by electron cyclotron heating in KSTAR H-mode plasmas journal February 2017
The KSTAR project: An advanced steady state superconducting tokamak experiment journal March 2000
Development of steady-state mirrors for the KSTAR ECH launchers conference June 2013
State-of-the-art neoclassical tearing mode control in DIII-D using real-time steerable electron cyclotron current drive launchers journal May 2014
Neoclassical tearing mode control using electron cyclotron current drive and magnetic island evolution in JT-60U journal April 2009
Additive manufacturing of steady-state mirrors for the KSTAR ECH launchers conference May 2015
Simulation of ECCD optimization for neoclassical tearing mode suppression in KSTAR journal April 2008
Experiment and simulation of tearing mode evolution with electron cyclotron current drive in KSTAR journal April 2015
Overview of the ITER EC upper launcher journal April 2008
TORBEAM, a beam tracing code for electron-cyclotron waves in tokamak plasmas journal May 2001

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Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
KSTAR
ECH
Launcher
Launcher control
Advanced tokamak operation