Patent ID: 8598790

Claim:
Electron accelerator comprising a resonant cavity ( 10 ) having an outer cylindrical conductor ( 11 ) of axis A and a coaxial inner cylindrical conductor ( 12 ), both cylindrical conductors being shorted at their ends with respectively a top conductive closure ( 13 ) and a bottom conductive closure ( 14 ), an electron gun ( 20 ) adapted to inject a beam of electrons ( 40 ) into the resonant cavity ( 10 ) following a radial direction in a median transversal plane (MP) of the resonant cavity ( 10 ), an RF system ( 50 ) adapted to generate a resonant transverse electric field into the resonant cavity for accelerating the electrons of the electron beam ( 40 ) a plurality of times into the median transversal plane (MP) and according to successive trajectories following angularly shifted diameters of the outer cylindrical conductor ( 11 ), said RF system ( 50 ) comprising a plurality of final power amplifiers (FPAI, FPA 2 , . . . , FPAn), each final power amplifier being separately coupled to the cavity (i 0 ) through an individual inductive loop ( 55 ), deflecting magnets ( 30 ) for bending back the electron beam ( 40 ) emerging from the outer cylindrical conductor ( 11 ) and for redirecting the beam ( 40 ) towards the axis A, wherein the individual inductive loops ( 55 ) are physically spaced apart from each other by an angle alpha, such that alpha is not an integer multiple of 90 degrees.