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Langmuir Wave Phase Velocity in Unneutralized Beams

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1 Author(s)
Godfrey, B.B. ; University of California Los Alamos Scientific Laboratory Los Alamos, New Mexico 87545

We investigate the dispersion relation for long wavelength slow Langmuir waves in a relativistic particle beam propagating along a strong magnetic guide field in an evacuated metallic waveguide. For a large class of beam radial profiles, wave phase velocity drops to zero with infinite slope as beam current approaches the space-charge limit. This result is of importance to certain collective ion acceleration proposals.

Published in:

Plasma Science, IEEE Transactions on  (Volume:6 ,  Issue: 4 )