Title: Non-linear coupling of the lower hybrid grill in ASDEX
Abstract: Computations of the reflection coefficient based on a non-linear lower hybrid (LH) coupling theory are presented and compared with the measurements of the reflection coefficient of the ASDEX tokamak LH grill, where powers up to 4 kW/cm2 have been launched. This high LH power density modifies the electron density in front of the grill because of ponderomotive forces. Thus, the coupling and the power reflection coefficient change. To explain the observed saturation of the growth of the reflection coefficient with power, it is necessary to take into account some heating of the plasma in front of the grill by the transmitted LH power, which also leads to a poloidally inhomogeneous edge electron density.
Publication Year: 1991
Publication Date: 1991-09-01
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 48
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot