DC-like Phase Space Manipulation and Particle Acceleration Using Chirped AC Fields

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Waves in plasmas can accelerate particles that are resonant with the wave. A DC electric field also accelerates particles, but without a resonance discrimination, which makes the acceleration mechanism profoundly different. We investigate the effect on a Hamiltonian distribution of an accelerating potential waveform, which could, for example, represent the average ponderomotive effect of two counterpropagating electromagnetic waves. In particular, we examine the apparent DC-like time-asymptotic response of the distribution in regimes where the potential structure is accelerated adiabatically. A highly resonant population within the distribution is always present, and we characterize its nonadiabatic response during wave-particle resonance using an ... continued below

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Fisch, P.F. Schmit and N.J. June 17, 2009.

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Waves in plasmas can accelerate particles that are resonant with the wave. A DC electric field also accelerates particles, but without a resonance discrimination, which makes the acceleration mechanism profoundly different. We investigate the effect on a Hamiltonian distribution of an accelerating potential waveform, which could, for example, represent the average ponderomotive effect of two counterpropagating electromagnetic waves. In particular, we examine the apparent DC-like time-asymptotic response of the distribution in regimes where the potential structure is accelerated adiabatically. A highly resonant population within the distribution is always present, and we characterize its nonadiabatic response during wave-particle resonance using an integral method in the noninertial reference frame moving with the wave. Finally, we show that in the limit of infinitely slow acceleration of the wave, these highly resonant particles disappear and the response

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191Kb

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  • Report No.: PPPL-4419
  • Grant Number: DE-AC02-09CH11466
  • DOI: 10.2172/958401 | External Link
  • Office of Scientific & Technical Information Report Number: 958401
  • Archival Resource Key: ark:/67531/metadc930779

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  • June 17, 2009

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 8:49 p.m.

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Fisch, P.F. Schmit and N.J. DC-like Phase Space Manipulation and Particle Acceleration Using Chirped AC Fields, report, June 17, 2009; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc930779/: accessed July 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.