Particle dynamics in chirped-frequency fluctations

C. T. Hsu, C. Z. Cheng, P. Helander, D. J. Sigmar, R. White

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)


Hamiltonian systems describing particle motion in a wave with time-dependent (chirped) frequency are studied. The wave is found to form a single-node separatrix (bucket) moving in the phase space at a rate proportional to that of the frequency change. Particles trapped inside the bucket undergo convection, while untrapped particles colliding with the bucket get a resonant kick, in phase space. In toroidal systems, these effects can result in a large radial convective flux roughly proportional to the size of the bucket and the frequency chirping. Possible applications of this novel mechanism to tokamak plasmas are discussed.

Original languageEnglish
Pages (from-to)2503-2507
Number of pages5
JournalPhysical review letters
Issue number16
Publication statusPublished - 1994

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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