Magnetic-field extraction and filamentation of high-current electron beams
Abstract
Beam extraction simulations for high-voltage, immersed source accelerators are compared with analytic theory and experiment. dynadisc, a new nonlinear beam propagation code, is described and applied to the initial few meters of propagation in 1 atm air. The dynadisc results indicate that filamentation is the fastest growing instability. The filamentation changes the beam current density profile from an annular to a quasi-uniform distribution.
- Publication:
-
Journal of Applied Physics
- Pub Date:
- February 1986
- DOI:
- 10.1063/1.336590
- Bibcode:
- 1986JAP....59..725F
- Keywords:
-
- Electron Accelerators;
- Electron Beams;
- High Current;
- Magnetic Fields;
- Computerized Simulation;
- Filaments;
- Finite Difference Theory;
- Nuclear and High-Energy Physics