Title :
A real time instantaneous frequency estimator for rotating magnetic islands in a tokamak thermonuclear plasma
Author :
D´Antona, G. ; Ferrero, Alessandro ; Ottoboni, Robert
Author_Institution :
Dipartimento di Elettronica, Politecnico di Milano, Italy
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; frequency measurement; magnetic devices; parameter estimation; plasma confinement; plasma diagnostic techniques; plasma magnetohydrodynamics; real-time systems; MHD; digital method; external magnetic field; laboratory tests; nuclear fusion; plasma confinement; real time instantaneous frequency estimator; rotating magnetic islands; rotating speed; tokamak thermonuclear plasma; Force measurement; Frequency estimation; Fusion reactors; Inductors; Magnetic confinement; Magnetic field measurement; Plasma confinement; Rotation measurement; Tokamaks; Velocity measurement;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1994. IMTC/94. Conference Proceedings. 10th Anniversary. Advanced Technologies in I & M., 1994 IEEE
Conference_Location :
Hamamatsu
Print_ISBN :
0-7803-1880-3
DOI :
10.1109/IMTC.1994.352059
