Title :
A real-time instantaneous frequency estimator for rotating magnetic islands in a tokamak thermonuclear plasma
Author :
D´Antona, Gabriele ; Ferrero, Alessandro ; Ottoboni, Roberto
Author_Institution :
Dipartimento di Elettrotecnica, Politecnico di Milano, Italy
fDate :
6/1/1995 12:00:00 AM
Abstract :
The evolution of rotating magnetic islands is a limit for the regime of stable operation in tokamak plasma confinement systems for nuclear fusion research, working close to operating conditions required in a future reactor. It is possible to counteract the growth of the magnetic islands by applying an external magnetic field, provided that the rotating speed of the magnetic islands is measured. The rotating speed can be determined from the measurement of the frequency of the electromotive force induced on a set of magnetic detectors. This paper proposes a digital method for the estimation of this frequency. The results of some laboratory tests performed on a prototype device of the estimator are reported
Keywords :
Tokamak devices; computerised instrumentation; digital instrumentation; electric potential; electric sensing devices; frequency estimation; frequency measurement; fusion reactor instrumentation; fusion reactors; laboratory techniques; physics computing; plasma confinement; plasma diagnostics; real-time systems; digital method; electromotive force; external magnetic field; magnetic detectors; magnetic islands; nuclear fusion; real-time instantaneous frequency estimator; rotating magnetic islands; rotating speed; stable operation; tokamak plasma confinement; tokamak thermonuclear plasma; Force measurement; Frequency estimation; Fusion reactors; Inductors; Magnetic confinement; Magnetic field measurement; Plasma confinement; Rotation measurement; Tokamaks; Velocity measurement;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
