- Both Reflex Klystrons and Two cavity Klystrons use electric field between parallel plates to accelerate or decelerate (i.e. velocity modulate) the electrons emitted from Cathode. Question is, will there be a same effect of velocity modulation, if I place a toroidal core (ferrite or air core) with coil wound around it and feed by a RF source ? because the time varying magnetic fields in the toroidal coil produces time varying Electric Fields parallel to the electron motion inside the Tube.
Please Notice That the Toroid Coil is Outside the Discharge Tube and yet able to influence electrons moving inside the Tube.