Studies on LH-generated Fast Electron Tail Using the Oblique ECE Diagnostic at JET
Abstract
The new Oblique ECE diagnostics of JET allows simultaneous measurement along three lines of sight at different toroidal angles. JET pulses, in which modulated LHCD power was applied, were analyzed by means of the SPECE emission code, which takes into account the fast electron tail generated by LH. The code results were compared to the ECE spectra from the oblique ECE diagnostic. The match between the computed and the experimental data from the three lines of sight provides an estimate of the density of superthermal electrons and of their maximum energy from which the fraction of the plasma current driven by LHCD is derived.
- Publication:
-
Radio Frequency Power in Plasmas
- Pub Date:
- November 2009
- DOI:
- 10.1063/1.3273773
- Bibcode:
- 2009AIPC.1187..387S
- Keywords:
-
- plasma diagnostics;
- plasma waves;
- plasma density;
- plasma simulation;
- 52.70.Gw;
- 52.35.Hr;
- 52.25.Kn;
- 52.65.Tt;
- Radio-frequency and microwave measurements;
- Electromagnetic waves;
- Thermodynamics of plasmas;
- Gyrofluid and gyrokinetic simulations