Abstract
A method for measuring the radial profile of the lower hybrid-driven current in a low density tokamak plasma using electron-cyclotron wave attenuation is discussed. This diagnostic scheme is reminiscent of the transmission interferometry approach, commonly used in tokamaks to measure the plasma density, but now the wave amplitude instead of the phase is measured. Wave attenuation of the ordinary mode at {omega}{sub p} << {omega} < {omega}{sub c} along vertical chords is measured; at these frequencies the waves are absorbed by the superthermal tail sustained by the lower hybrid waves and the local wave absorption coefficient is proportional to the non-inductive curent density. The radial profile of this curent is obtained from the Abel inversion. An application to the Tore Supra tokamak is presented.
Fidone, I;
Giruzzi, G;
[1]
Caron, X;
Meyer, R L
[2]
- Association Euratom-CEA, Centre d`Etudes Nucleaires de Cadarache, 13 -Saint-Paul-lez-Durance (France). Dept. de Recherches sur la Fusion Controlee
- Nancy-1 Univ., 54 (France)
Citation Formats
Fidone, I, Giruzzi, G, Caron, X, and Meyer, R L.
Measurement of lower hybrid-driven current profile by Abel inversion of electron-cyclotron wave transmission spectra.
France: N. p.,
1991.
Web.
Fidone, I, Giruzzi, G, Caron, X, & Meyer, R L.
Measurement of lower hybrid-driven current profile by Abel inversion of electron-cyclotron wave transmission spectra.
France.
Fidone, I, Giruzzi, G, Caron, X, and Meyer, R L.
1991.
"Measurement of lower hybrid-driven current profile by Abel inversion of electron-cyclotron wave transmission spectra."
France.
@misc{etde_10131270,
title = {Measurement of lower hybrid-driven current profile by Abel inversion of electron-cyclotron wave transmission spectra}
author = {Fidone, I, Giruzzi, G, Caron, X, and Meyer, R L}
abstractNote = {A method for measuring the radial profile of the lower hybrid-driven current in a low density tokamak plasma using electron-cyclotron wave attenuation is discussed. This diagnostic scheme is reminiscent of the transmission interferometry approach, commonly used in tokamaks to measure the plasma density, but now the wave amplitude instead of the phase is measured. Wave attenuation of the ordinary mode at {omega}{sub p} << {omega} < {omega}{sub c} along vertical chords is measured; at these frequencies the waves are absorbed by the superthermal tail sustained by the lower hybrid waves and the local wave absorption coefficient is proportional to the non-inductive curent density. The radial profile of this curent is obtained from the Abel inversion. An application to the Tore Supra tokamak is presented.}
place = {France}
year = {1991}
month = {Feb}
}
title = {Measurement of lower hybrid-driven current profile by Abel inversion of electron-cyclotron wave transmission spectra}
author = {Fidone, I, Giruzzi, G, Caron, X, and Meyer, R L}
abstractNote = {A method for measuring the radial profile of the lower hybrid-driven current in a low density tokamak plasma using electron-cyclotron wave attenuation is discussed. This diagnostic scheme is reminiscent of the transmission interferometry approach, commonly used in tokamaks to measure the plasma density, but now the wave amplitude instead of the phase is measured. Wave attenuation of the ordinary mode at {omega}{sub p} << {omega} < {omega}{sub c} along vertical chords is measured; at these frequencies the waves are absorbed by the superthermal tail sustained by the lower hybrid waves and the local wave absorption coefficient is proportional to the non-inductive curent density. The radial profile of this curent is obtained from the Abel inversion. An application to the Tore Supra tokamak is presented.}
place = {France}
year = {1991}
month = {Feb}
}