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

Volume

44

Issue

3

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

725

Lastpage

728

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;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.387318

Filename

387318