ON THE DENSITY OSCILLATIONS OF A WARM PARTICLE BUNCH

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The density oscillations of warm particle bunches is investigated theoretically. Two different mathematical approaches are employed to derive the basic equation describing density oscillations; one is a fluid approach and the second is a more general Green1s function formulation. The motion is analyzed in first order perturbation theory where it is shown, under the assumption of no degeneracy, that there are only stable oscillations. Second order perturbation theory gives damping of the motion. The perturbation theory is examined and a criterion is exhibited for its proper use. Thus, when the resistivity is small enough (but nonzero) then the motion is ... continued below

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47 p.

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Channell, P.J.; Sessler, A.M. & Wurtele, J.S. November 1, 1982.

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The density oscillations of warm particle bunches is investigated theoretically. Two different mathematical approaches are employed to derive the basic equation describing density oscillations; one is a fluid approach and the second is a more general Green1s function formulation. The motion is analyzed in first order perturbation theory where it is shown, under the assumption of no degeneracy, that there are only stable oscillations. Second order perturbation theory gives damping of the motion. The perturbation theory is examined and a criterion is exhibited for its proper use. Thus, when the resistivity is small enough (but nonzero) then the motion is stable, but when the resistivity is large then the motion is essentially unstable with a growth rate which is that of an unbunched beam. The criterion is approximately evaluated using a model for a bunched beam.

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47 p.

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  • Journal Name: Physics of Fluids

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  • Report No.: LBL-15320
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 937104
  • Archival Resource Key: ark:/67531/metadc895028

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  • November 1, 1982

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  • Sept. 27, 2016, 1:39 a.m.

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  • Oct. 31, 2016, 11:48 a.m.

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Channell, P.J.; Sessler, A.M. & Wurtele, J.S. ON THE DENSITY OSCILLATIONS OF A WARM PARTICLE BUNCH, article, November 1, 1982; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc895028/: accessed August 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.