An approach to the design of high perveance, low compression guns is described in which confinement is used to stabilize the beam for subsequent periodic-permanent-magnet focusing. The computed results for two cases are presented. A magnetic boundary value problem was solved for the scalar potential from which the axial magnetic field was computed. A solution was found by iterating between Poisson's equation and the electron trajectory calculations. Magnetic field values were varied in magnitude until a laminar beam with minimum scalloping was produced.

/pdf/design-of-high-perveance-confined-flow-guns-for-periodic-50dt6teoxk.pdf

N. Stankiewicz

Papers

Design of High-Perveance Confined-Flow Guns for Periodic- Permanent-Magnet-Focused Tubes