Compact electron accelerator containing permanent magnets

摘要

PROBLEM TO BE SOLVED: To provide a compact electron accelerator comprising a permanent magnet.SOLUTION: An electron accelerator includes: (a) a resonant cavity 1 comprising a hollow closed conductor; (b) an electron supply source configured to radially inject an electron beam into the resonant cavity; (c) an RF system coupled to the resonant cavity and generating an electric field to accelerate electrons of the electron beam along a radial trajectory; and (d) a magnet unit 30i including a deflecting magnet configured to generate a magnetic field in a deflecting chamber 31 in fluid communication with the resonant cavity by a deflecting window 31w, the magnetic field being configured to deflect an electron beam emerging out of the resonant cavity through the deflecting window along a first radial trajectory in a mid-plane and to redirect the electron beam into the resonant cavity through the deflecting window towards a central axis along a second radial trajectory. The deflecting magnet is composed of first and second permanent magnets positioned on both sides of the mid-plane.SELECTED DRAWING: Figure 3