Effects of Finite Density Fluctuations and of the Upper Hybrid Resonance on O-X Correlation Reflectometry

Kramer, G.J. ; Nazikian, R. ; Valeo, E.

Princeton University. Plasma Physics Laboratory.

关键词: Plasma Heating;    Oscillation Modes;    Magnetic Fields;    70 Plasma Physics And Fusion Technology;    Correlations;   

DOI  :  10.2172/775581
RP-ID  :  PPPL-3544
RP-ID  :  AC02-76CH03073
RP-ID  :  775581

美国|英语

来源: UNT Digital Library

【 摘 要 】

The correlation between O-mode and X-mode reflectometer signals is studied with a 1-D reflectometer model taking into account the influence of finite density fluctuation levels and the upper hybrid resonance. It is found that a high level of O-X correlation can only be achieved for sufficiently small density fluctuation levels (typically much less than 1%) or very low magnetic field strengths. The influence of the upper hybrid resonance on the O-X correlation was found to also degrade the correlation between the O and X mode signals for very low magnetic field strengths or for very short density scale lengths. The extrapolation of these results to reactor-scale parameters indicates that the magnetic field strength can reliably be measured in the core plasma provided the density fluctuation level is typically much less than 1%.