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Title: The Effects Of Finite Electron Temperature And Diffraction On Lowere Hybrid Wave Propagation

In this paper we show that the commonly used cold plasma dispersion relation for plasma waves in the lower hybrid range of frequencies (LHRF) produces a wave trajectory that is notably different than when thermal corrections to the Hermitian part of the dielectric tensor are retained. This is in contrast to the common implementation in LH simulation codes in which thermal effects are retained only for the anti-Hermitian part of the dielectric tensor used for damping calculations. We show which term is the critical one to retain in the dielectric tensor and discuss implications for modeling of LHRF waves in present day and future devices. We conclude with some observations on the effects of diffraction that may be isolated once thermal effects are retained in both ray tracing and full-wave approaches.
Authors:
;
Publication Date:
OSTI Identifier:
1129022
Report Number(s):
PPPL-4989
DOE Contract Number:
DE-ACO2-09CH11466
Resource Type:
Technical Report
Publisher:
Plasma Physics and Controlled Fusion (February 2014)
Research Org:
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY Lower Hybrid Waves, Wave Absorption, Wave Propagation ,RF Heating