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A multiple autoresonance process for accelerating electrons is presented. It is based on the autoresonance mechanism put forth in a previous publication. The configuration under study consists of two circularly polarized electromagnetic waves propagating in opposite directions along a constant magnetic field and having frequencies in the electron frequency range. Such a configuration admits, under appropriate conditions, stochastic motion of the particle. It is shown that the stochastic nature of the motion plays an important role for inducing the multiple autoresonance acceleration. The threshold for the onset of stochasticity when considering waves with different characteristics and particles with different initial conditions is evaluated and compared with the numerical data. It is shown that for a proper choice of the parameters of the system, the multiple autoresonance process can generate a bulk of particles moving in a preferential direction and having a considerable time-averaged velocity parallel to the magnetic field. Practical applications of this result are mentioned.

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Authors: GELL Y, CET, Tel-Aviv (IL);NAKACH R, CEA, CEN Cadarache, Saint-Paul-lez Durance (FR)
Bibliographic Reference: Article: Physical Review E, Vol. 55 (1997) No. 5, 5915-5923
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