Oscillators – Beam tube – With electron bunching or velocity variation means
Patent
1996-07-10
1998-04-21
Grimm, Siegfried H.
Oscillators
Beam tube
With electron bunching or velocity variation means
315 36, 315 393, 331 83, H03B 908
Patent
active
057422095
ABSTRACT:
A four cavity, efficient magnetically insulated line oscillator (C4-E MILO) having seven vanes and six cavities formed within a tube-like structure surrounding a cathode. The C4-E MILO has a primary slow wave structure which is comprised of four vanes and the four cavities located near a microwave exit end of the tube-like structure. The primary slow wave structure is the four cavity (C4) portion of the magnetically insulated line oscillator (MILO). An RF choke is provided which is comprised of three of the vanes and two of the cavities. The RF choke is located near a pulsed power source portion of the tube-like structure surrounding the cathode. The RF choke increases feedback in the primary slow wave structure, prevents microwaves generated in the primary slow wave structure from propagating towards the pulsed power source and modifies downstream electron current so as to enhance microwave power generation. A beam dump/extractor is located at the exit end of the oscillator tube for extracting microwave power from the oscillator, and in conjunction with an RF extractor vane, which comprises the fourth vane of the primary slow wave structure (nearest the exit) having a larger gap radius than the other vanes of the primary SWS, comprises an RF extractor. Uninsulated electron flow is returned downstream towards the exit along an anode/beam dump region located between the beam dump/extractor and the exit where the RF is radiated at said RF extractor vane located near the exit and the uninsulated electron flow is disposed at the beam dump/extractor.
REFERENCES:
patent: 4785261 (1988-11-01), Bacon et al.
patent: 5302881 (1994-04-01), O'Loughlin
M. Clark et al., "Magnetically Insulated Transmission Line Oscillator," Appl. Phys. Lett., vol. 52, No. 1, Jan. 4, 1988.
B. Marder, "Simulated Behavior of the Magnetically Insulated Oscillator," J. Appl. Phys., vol. 65, No. 3, Feb. 1, 1989.
C. Mendel et al., "Experiments on a Current-Toggled Plasma-Opening Switch," J. Appl. Phys., vol. 71, No. 8, Apr. 15, 1992.
Calico Steve E.
Clark Miles C.
Lemke Raymond W.
Chafin James H.
Grimm Siegfried H.
Moser William R.
Ortiz Luis M.
The United States of America as represented by The United States
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