Claims
- 1. A Cerenkov electromagnetic wave oscillator, comprising
- a slab of dielectric material having a first substantially smooth surface,
- a metallic cladding on a second opposed surface of said slab,
- means to pass an electron beam adjacent said first surface of said slab from a position generally adjacent an input portion of said wave oscillator to a position generally adjacent an output portion thereof, and
- feedback means for selectively amplifying a chosen mode of radiation emitted from said oscillator.
- 2. A wave oscillator as in claim 1 wherein said feedback means comprises a feedback loop for removing some energy of said chosen mode from the output portion of the oscillator and feeding said energy back to the input portion of the oscillator.
- 3. Apparatus as in claim 1 or 2, wherein said feedback means comprises phase shifting means.
- 4. Apparatus as in claim 2, wherein said feedback means comprises waveguide means for passing said chosen mode of radiation.
RIGHTS OF THE GOVERNMENT
The invention described herein may be manufactured, used and licensed by or for the U.S. Government for governmental purposes without the payment to us of any royalty thereon.
US Referenced Citations (4)
Non-Patent Literature Citations (1)
Entry |
Marshall et al., "Generation of Coherent Cerenkov Radiation with an Intenseelativistic Electron Beam", The Physics of Fluids, vol. 20, Apr. 1977, pp. 709-710. |