Title :
Time-frequency images of magnetohydrodynamic phenomena in tokamak plasmas using a discrete-time Wigner distribution
Author :
Figueiredo, António C A ; Bizarro, João P S
Author_Institution :
Instituto Superior Tecnico, Lisbon, Portugal
fDate :
2/1/2002 12:00:00 AM
Abstract :
A discrete-time Wigner distribution is used to yield a time-frequency representation of nonstationary magnetic activity at the edge of a tokamak plasma, thereby contributing to the magnetohydrodynamic analysis of the underlying phenomena, more precisely, to the identification of toroidal Alfven eigenmodes
Keywords :
Tokamak devices; Wigner distribution; eigenvalues and eigenfunctions; plasma Alfven waves; plasma magnetohydrodynamics; Tokamak plasmas; discrete-time Wigner distribution; fusion plasmas; magnetohydrodynamic phenomena; nonstationary magnetic activity; plasma edge; time-frequency analysis; time-frequency images; time-frequency representation; toroidal Alfv6n eigenmodes; Heating; Magnetic analysis; Magnetic confinement; Magnetohydrodynamics; Plasma accelerators; Plasma confinement; Signal processing; Time frequency analysis; Tokamaks; Toroidal magnetic fields;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2002.1003920
