摘要:
Axially symmetric magnetic fields are provided about the longitudinal axis of each beam of a multi-beam electron beam device (MBEBD). A flux equalizer assembly is disposed between the cathodes and the anodes and near the cathodes of a (MBEBD). The assembly includes a ferromagnetic flux plate completely contained within the magnetic focusing circuit of the (MBEBD). The flux plate includes apertures for each beam of the (MBEBD). A flux equalization gap or gaps are disposed in the flux plate to provide a perturbation in the magnetic field in the flux plate which counters the asymmetry induced by the off-axis position of the beam. The gaps (MBEBD) have the effect of producing a locally continuously varying reluctance that locally counters the magnetic field asymmetry. The flux equalizer assembly prevents or substantially reduces beam twist and maintains all of the electron beams of the (MBEBD) as linear beams.
摘要:
An impregnated cathode structure using an impregnated cathode substrate which includes a large grain size, low porosity region and a small grain size, high porosity region disposed on the side of an electron emission surface of the large grain size, low porosity region, having a mean grain size smaller than a mean grain size in the large grain size, low porosity region and having a porosity greater than the porosity in the large grain size, low porosity region, and which is impregnated with an electron emission material.
摘要:
In an output resonant cavity 7 used with a linear electron beam tube such as an IOT, magnetic material 17 and 23 is mounted on walls 12 and 13 of the cavity and defines annular channels within which coils 21, 22 and 27 are located to provide focusing of an electron beam travelling along the axis X-X of a tube located in the apertures 15 and 16. An inner rim 28 locates the electron beam tube in relation to the cavity.
摘要:
In an output resonant cavity 7 used with a linear electron beam tube such as an IOT, magnetic material 17 and 23 is mounted on walls 12 and 13 of the cavity and defines annular channels within which coils 21, 22 and 27 are located to provide focusing of an electron beam travelling along the axis X-X of a tube located in the apertures 15 and 16. An inner rim 28 locates the electron beam tube in relation to the cavity.
摘要:
The invention concerns a method of significantly increasing the efficiency of a gyrotron and a gyrotron designed to carry out the method. Optimum matching of the gyrotron geometry and the magnetic field enables the overall efficiency to be increased if a slightly undulating magnetic field exists in the resonator zone and if the commutator is electrically biased or has coaxial electrically biased zones disposed adjacent to each other in the axial direction.