Ponderomotive Barrier as a Maxwell Demon | Zendy

I. Y. Dodin | Zendy; N. J. Fisch | Zendy; Jean-Marcel Rax | Zendy

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Ponderomotive Barrier as a Maxwell Demon

Author(s) -

I. Y. Dodin,

N. J. Fisch,

Jean-Marcel Rax

Publication year - 2004

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/827931

Subject(s) - ponderomotive force , physics , magnetic field , quantum electrodynamics , cyclotron , acceleration , plasma , current (fluid) , action (physics) , computational physics , field (mathematics) , classical mechanics , quantum mechanics , mathematics , pure mathematics , thermodynamics

The possibility of efficient ponderomotive current drive in a magnetized plasma was reported recently in [Phys. Rev. Lett. 91, 205004 (2003)]. Precise limitations on the efficiency are now given through a comprehensive analytical and numerical study of single-particle dynamics under the action of a cyclotron-resonant rf drive in various field configurations. Expressions for the particle energy gain and acceleration along the dc magnetic field are obtained. The fundamental correlation between the two effects is described. A second fundamental quantity, namely the ratio of the potential barrier to the energy gain, can be changed by altering the field configuration. The asymmetric ponderomotive current drive effect can be optimized by minimizing the transverse heating

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