TY - JOUR
T1 - Particle dynamics in chirped-frequency fluctations
AU - Hsu, C. T.
AU - Cheng, C. Z.
AU - Helander, P.
AU - Sigmar, D. J.
AU - White, R.
PY - 1994
Y1 - 1994
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.72.2503
DO - 10.1103/PhysRevLett.72.2503
M3 - Article
AN - SCOPUS:4243775147
SN - 0031-9007
VL - 72
SP - 2503
EP - 2507
JO - Physical review letters
JF - Physical review letters
IS - 16
ER -