A Hamiltonian Model of Dissipative Wave-particle Interactions and the Negative-mass Effect
Authors: A. Zhmoginov
Abstract:
The effect of radiation friction is included in the Hamiltonian treatment of wave-particle interactions with autoresonant phase-locking, yielding a generalized canonical approach to
the problem of dissipative dynamics near a nonlinear resonance. As an example, the negativemass eff ect exhibited by a charged particle in a pump wave and a static magnetic field
is studied in the presence of the friction force due to cyclotron radiation. Particles with negative parallel masses m! are shown to transfer their kinetic energy to the pump wave, thus
amplifying it. Counterintuitively, such particles also undergo stable dynamics, decreasing their transverse energy monotonically due to cyclotron cooling, whereas some of those with
positive m! undergo cyclotron heating instead, extracting energy from the pump wave.
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Submitted to: Physics Letters A (August 2010)
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