Study of lower hybrid wave propagation in ionized gas by Hamiltonian theory

Journal Article · Wed Feb 12 04:00:00 EST 2014 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4864582· OSTI ID:22264089

Casolari, A. ^[1]; Cardinali, A. ^[2]

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1. Università di Pisa, Pisa (Italy)
2. Associazione Euratom-ENEA sulla Fusione, C.P. 65 - I-00044 - Frascati, Rome (Italy)

In order to find an approximate solution to the Vlasov-Maxwell equation system describing the lower hybrid wave propagation in magnetic confined plasmas, the use of the WKB method leads to the ray tracing equations. The Hamiltonian character of the ray tracing equations is investigated analytically and numerically in order to deduce the physical properties of the wave propagating without absorption in the confined plasma. The consequences of the Hamiltonian character of the equations on the travelling wave, in particular, on the evolution of the parallel wavenumber along the propagation path have been accounted and the chaotic diffusion of the timeaveraged parallel wave-number towards higher values has been evaluated. Numerical analysis by means of a Runge-Kutta based algorithm implemented in a ray tracing code supplies the analytical considerations. A numerical tool based on the symplectic integration of the ray trajectories has been developed.

• OSTI ID: 22264089
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1580; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION
BOLTZMANN-VLASOV EQUATION
HAMILTONIANS
LOWER HYBRID HEATING
NUMERICAL ANALYSIS
PHYSICAL PROPERTIES
PLASMA
TRAVELLING WAVES
WAVE PROPAGATION