A Different Way to Achieve Electron Velocity Modulation in a Klystron

AI Thread Summary
The discussion focuses on the influence of a toroid coil placed outside a discharge tube on electron behavior within the tube. It suggests that the field distribution of the toroid is comparable to that of a cavity resonator, specifically referencing the rhumbatron. The speaker expresses confidence in the experimental setup, noting that the electric field (E field) in this configuration may be lower than in traditional toroidal cavities. Additionally, it is mentioned that the impedance of the toroidal core would be low due to the parallel arrangement of the coil's wires relative to the electron beam. The conversation emphasizes the potential effectiveness of this approach in electron velocity modulation.
Narayanan KR
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TL;DR Summary
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.
klystron1.jpg


Please Notice That the Toroid Coil is Outside the Discharge Tube and yet able to influence electrons moving inside the Tube.
 
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I think it is OK. I think the field distribution of a toroid is the same as the cavity resonator you show (rhumbatron as it was called).
 
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tech99 said:
I think it is OK. I think the field distribution of a toroid is the same as the cavity resonator you show (rhumbatron as it was called).
Thank You, now I shall Proceed with my Experiment.
 
tech99 said:
I think the field distribution of a toroid is the same as the cavity resonator you show (rhumbatron as it was called).
I have a feeling that the E field in the proposed system would be a lot lower than across the gap in a normal toroidal cavity. The Impedance of the toroidal core where the electrons pass through would be low because there are wires (the turns of the coil) parallel to the direction of the electron beam. E field along the surface of a wire is about zero.
 
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