Filamentation instability of a self‐pinched hollow electron beam

1986 ◽  
Vol 29 (9) ◽  
pp. 3074-3083 ◽  
Author(s):  
Han S. Uhm ◽  
Thomas P. Hughes
Keyword(s):  
Electron Beam ◽  
Filamentation Instability ◽  
Hollow Electron Beam

EARLY OUT-OF-EQUILIBRIUM BEAM-PLASMA EVOLUTION: POSSIBLE FORMATION OF A BEAM RING STRUCTURE

2007 ◽  
Vol 21 (03n04) ◽  
pp. 633-636 ◽  
Author(s):  
M. C. FIRPO ◽  
A. F. LIFSCHITZ
Keyword(s):  
Electron Beam ◽  
Transverse Isotropy ◽  
Ring Structure ◽  
Skin Depth ◽  
Beam Radius ◽  
Particle In Cell ◽  
Beam Plasma ◽  
Initial Stage ◽  
Filamentation Instability ◽  
Beam Edge

We solve analytically the out-of-equilibrium initial stage that follows the injection of a radially finite electron beam into a plasma at rest and test it against particle-in-cell simulations. For initial large beam edge gradients and not too large beam radius, compared to the electron skin depth, the electron beam is shown to evolve into a ring structure. For low enough transverse temperatures, filamentation instability eventually proceeds and saturates when transverse isotropy is reached. The analysis accounts for the variety of very recent experimental beam transverse observations.

Influence of the return current effects on the diocotron instability of a relativistic hollow electron beam

1989 ◽  
Vol 66 (1) ◽  
pp. 108-114
Author(s):  
Eun H. Choi ◽  
Han S. Uhm ◽  
Sun K. Song ◽  
Duk I. Choi
Keyword(s):  
Electron Beam ◽  
Return Current ◽  
Diocotron Instability ◽  
Hollow Electron Beam
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