Abstract
A method for determining the radial profile of the lower-hybrid current drive in tokamaks uing electron-cyclotron attenuation of the O-mode for frequencies {omega} near the cut-off frequency is discussed. The basic idea is that for a given wave frequency, the cut-off plays the role of a spatial filter selecting a variable portion of the non-inductive current. It is shown that the incremental attenuation resulting from a small increase of {omega} displays specific features related to the current density near the cut-off point. Using the relation between the wave damping and the current density it is possible to determine the radial profile of the current drive from the wave attenuation measurements. A numerical application is also presented for plasma parameters in the reactor regime.
Fidone, I;
[1]
Meyer, R L;
Caron, X
[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, Meyer, R L, and Caron, X.
Measurement of current drive profile using electron cyclotron wave attenuation near the O-mode cut-off.
France: N. p.,
1991.
Web.
Fidone, I, Meyer, R L, & Caron, X.
Measurement of current drive profile using electron cyclotron wave attenuation near the O-mode cut-off.
France.
Fidone, I, Meyer, R L, and Caron, X.
1991.
"Measurement of current drive profile using electron cyclotron wave attenuation near the O-mode cut-off."
France.
@misc{etde_10131275,
title = {Measurement of current drive profile using electron cyclotron wave attenuation near the O-mode cut-off}
author = {Fidone, I, Meyer, R L, and Caron, X}
abstractNote = {A method for determining the radial profile of the lower-hybrid current drive in tokamaks uing electron-cyclotron attenuation of the O-mode for frequencies {omega} near the cut-off frequency is discussed. The basic idea is that for a given wave frequency, the cut-off plays the role of a spatial filter selecting a variable portion of the non-inductive current. It is shown that the incremental attenuation resulting from a small increase of {omega} displays specific features related to the current density near the cut-off point. Using the relation between the wave damping and the current density it is possible to determine the radial profile of the current drive from the wave attenuation measurements. A numerical application is also presented for plasma parameters in the reactor regime.}
place = {France}
year = {1991}
month = {Jan}
}
title = {Measurement of current drive profile using electron cyclotron wave attenuation near the O-mode cut-off}
author = {Fidone, I, Meyer, R L, and Caron, X}
abstractNote = {A method for determining the radial profile of the lower-hybrid current drive in tokamaks uing electron-cyclotron attenuation of the O-mode for frequencies {omega} near the cut-off frequency is discussed. The basic idea is that for a given wave frequency, the cut-off plays the role of a spatial filter selecting a variable portion of the non-inductive current. It is shown that the incremental attenuation resulting from a small increase of {omega} displays specific features related to the current density near the cut-off point. Using the relation between the wave damping and the current density it is possible to determine the radial profile of the current drive from the wave attenuation measurements. A numerical application is also presented for plasma parameters in the reactor regime.}
place = {France}
year = {1991}
month = {Jan}
}