Magneticfield extraction and filamentation of highcurrent electron beams
Abstract
Beam extraction simulations for highvoltage, 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 quasiuniform 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 HighEnergy Physics