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Periodic magnetic focusing of sheet electron beamsf| (1994)

Booske, J. H. ; Basten, M. A. ; Kumbasar, A. H. ; [et al.]

[S.l.] : American Institute of Physics (AIP)

Physics of Plasmas 1 (1994), S. 1714-1720

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ISSN: 1089-7674

Source: AIP Digital Archive

Topics: Physics

Notes: Sheet electron beams focused by periodically cusped magnetic (PCM) fields are stable against low-frequency velocity-shear instabilities (such as the diocotron mode). This is in contrast to the more familiar unstable behavior in uniform solenoidal magnetic fields. A period-averaged analytic model shows that a PCM-focused beam is stabilized by ponderomotive forces for short PCM periods. Numerical particle simulations for a semi-infinite sheet beam verify this prediction and also indicate diocotron stability for long PCM periods is less constraining than providing for space-charge confinement and trajectory stability in the PCM focusing system. In this article the issue of beam matching and side focusing for sheet beams of finite width is also discussed. A review of past and present theoretical and experimental investigations of sheet-beam transport is presented.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.870675

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