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On the dynamics of particles in tokamak magnetic field and in RF fields

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Czechoslovak Journal of Physics B Aims and scope

Abstract

The motion of magnetically trapped particles and their interaction with RF field is discussed; for the description, suitable canonical formalism is used. The chosen form of the Hamiltonian enables us to investigate in a relatively simple way the effect of RF fields on the change of the parallel and perpendicular velocities of particles, and, consequently, on the form of the banana and on its radial displacement. Special attention is devoted to the stochastic instability regime. Simple numerical discussion of the interaction of Alfvén waves with banana-trapped particles is presented, together with the estimation of the stochastic instability threshold.

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Authors and Affiliations

  1. Institute of Plasma Physics, Czechosl. Acad. Sci., Pod vodárenskou věží 4, Praha 8, Czechoslovakia

    Z. Gášek, L. Krlín & Z. Tlučhoř

Authors
  1. Z. Gášek
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  2. L. Krlín
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  3. Z. Tlučhoř
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Additional information

The authors are indebted to Dr. V. V. Parail for the help in the formulation of the problem of the interaction of Alfvén waves with particles in the intrinsic stochasticity regime and to Dr. P. N. Yushmanov for valuable discussions. The authors also would like to thank Dr. J. Horáček and Dr. P. Pavlo for numerical help and stimulating discussions.

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Gášek, Z., Krlín, L. & Tlučhoř, Z. On the dynamics of particles in tokamak magnetic field and in RF fields. Czech J Phys 37, 571–595 (1987). https://doi.org/10.1007/BF01597187

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  • DOI: https://doi.org/10.1007/BF01597187

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