The mixed Wentzel-Kramers-Brillouin-full-wave approach and its application to lower hybrid wave propagation and absorption

Journal Article · Fri Mar 15 04:00:00 EDT 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4798408· OSTI ID:22107666

Lu, Z. X. ^[1]; Zonca, F. ^[2]; Cardinali, A. ^[2]

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1. State Key Laboratory of Nuclear Physics and Technology, School of Physics and Fusion Simulation Center, Peking University, Beijing 100871 (China)
2. Associazione EURATOM-ENEA sulla Fusione, CP 65-00044 Frascati, Roma (Italy)

The mixed Wentzel-Kramers-Brillouin (WKB)-full-wave approach for the calculation of the 2D mode structure in tokamak plasmas is further developed based on our previous work [A. Cardinali and F. Zonca, Phys. Plasmas 10, 4199 (2003) and Z. X. Lu et al., Phys. Plasmas 19, 042104 (2012)]. A new scheme for theoretical analysis and numerical implementation of the mixed WKB-full-wave approach is formulated, based on scale separation and asymptotic analysis. Besides its capability to efficiently investigate the initial value problem for 2D mode structures and linear stability, in this work, the mixed WKB-full-wave approach is extended to the investigation of radio frequency wave propagation and absorption, e.g., lower hybrid waves. As a novel method, its comparison with other approaches, e.g., WKB and beam tracing methods, is discussed. Its application to lower hybrid wave propagation in concentric circular tokamak plasmas using typical FTU discharge parameters is also demonstrated.

• OSTI ID: 22107666
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 3 Vol. 20; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION
ASYMPTOTIC SOLUTIONS
LOWER HYBRID CURRENT DRIVE
LOWER HYBRID HEATING
PLASMA
PLASMA CONFINEMENT
RADIOWAVE RADIATION
TOKAMAK DEVICES
TWO-DIMENSIONAL CALCULATIONS
WAVE PROPAGATION
WKB APPROXIMATION