Cumulative hose instabilities of a magnetically self-focused slab electron beam

Journal Article · Wed Dec 01 04:00:00 EST 1993 · Physics of Fluids B; (United States)

DOI:https://doi.org/10.1063/1.860559· OSTI ID:5835508

Whittum, D H ^[1]

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1. National Laboratory for High Energy Physics (KEK), 1-1 Oho, Tsukuba, Ibaraki, 305 (Japan)

Transverse instabilities are investigated for the slab analog of the Bennett equilibrium of a magnetically self-focused relativistic electron beam propagating through a plasma. Two kinds of plasma are considered: a channel matched to the beam and a broad uniform plasma. The high-frequency electrostatic transverse two-stream instability and the lower-frequency resistive-hose instability are treated analytically with a distributed tune ( mass'') model. Asymptotic growth is computed for each instability in various regimes, and analytic results are benchmarked against numerical solutions of the linearized system and particle-in-cell simulations. It is found that in the limit of large collisionless skin depth the electrostatic hose is the more virulent mode of beam breakup. Numerical examples are discussed for parameters in the range considered for plasma focusing of the asymmetric beams of interest in high-energy physics.

• OSTI ID: 5835508
• Journal Information: Physics of Fluids B; (United States), Journal Name: Physics of Fluids B; (United States) Vol. 5:12; ISSN PFBPEI; ISSN 0899-8221
• Country of Publication: United States
• Language: English

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70 PLASMA PHYSICS AND FUSION TECHNOLOGY
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ANALYTICAL SOLUTION
BEAM INJECTION
BEAM-PLASMA SYSTEMS
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HOSE INSTABILITY
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PLASMA MICROINSTABILITIES
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