Vlasov simulations of spectral and fast electron features in lower hybrid current drive

Seppo Karttunen, Timo Pättikangas, Rainer Salomaa, Magdi Shourcri, I. Shkarofsky, Pierre Bertrand, Alain Ghizzo

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Abstract

An Eulerian drift-kinetic Vlasov code is used to study the interaction of lower hybrid (LH) waves with a plasma slab. We investigate the evolution of the LH spectrum, as well as the formation and evolution of the tail of the distribution function, as the LH waves propagate and damp across the plasma slab. Results obtained with single and compound spectra of LH waves are presented. In the case of compound spectra, the synergy between the fast and the slow spectrum of lower hybrid waves is studied. Test particle diagnostics is applied to estimate the velocity diffusion and the LH-driven spatial diffusion across the magnetic field. The Vlasov code gives an accurate representation of the distribution function in the low density region of the phase-space. The absence of noise in the Vlasov code allows for accurate calculations of the diffusion coefficients.
Original languageUndefined
Pages (from-to)356-364
Number of pages9
JournalPhysica Scripta
Volume60
Issue number4
DOIs
Publication statusPublished - 1999
MoE publication typeA1 Journal article-refereed

Cite this

Karttunen, S., Pättikangas, T., Salomaa, R., Shourcri, M., Shkarofsky, I., Bertrand, P., & Ghizzo, A. (1999). Vlasov simulations of spectral and fast electron features in lower hybrid current drive. Physica Scripta, 60(4), 356-364. https://doi.org/10.1238/Physica.Regular.060a00356