A digital control system for external magnetohydrodynamic modes in tokamak plasmas

Journal Article · Wed Apr 15 00:00:00 EDT 2009 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.3112607· OSTI ID:22053467

Hanson, J M; Klein, A J; Mauel, M E; Maurer, D A; Navratil, G A; Pedersen, T Sunn ^[1]

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1. Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027 (United States)

A feedback system for controlling external, long-wavelength magnetohydrodynamic activity is described. The system is comprised of a network of localized magnetic pickup and control coils driven by four independent, low-latency field-programable gate array controllers. The control algorithm incorporates digital spatial filtering to resolve low mode number activity, temporal filtering to correct for frequency-dependent amplitude and phase transfer effects in the control hardware, and a Kalman filter to distinguish the unstable plasma mode from noise.

• OSTI ID: 22053467
• Journal Information: Review of Scientific Instruments, Vol. 80, Issue 4; Other Information: (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ALGORITHMS
AMPLITUDES
CONTROL
CONTROL SYSTEMS
FEEDBACK
FREQUENCY DEPENDENCE
PLASMA
PLASMA INSTABILITY
TOKAMAK DEVICES
WAVELENGTHS