| 摘要 |
FIELD: physics.SUBSTANCE: radiation source is in the form of two thin (less than 0.5 mm) plates of heat-resistant glass glued around the periphery in a vacuum-tight manner, on which film electrodes are deposited, with a transparent electrode deposited on plate and a reflecting electrode on the other. A microchannel plate is tightly bonded to the plates in between said plates, the microchannel plate having a discontinuous layer of phosphor and electron emitter nanopowders on the semiconductor surface of its channels. Electron emission, amplification of the flux thereof and cathode luminescence (radiation) occur in the microchannel plate. The plate with the transparent electrode is bonded to a detachable transparent plate on the external side of the housing, said detachable transparent plate having inside it or on its surface nanopowder of a material with a spectral radiation conversion property. Microchannels of the microchannel plate, having length L and diameter w, are inclined at an angle ? to the field lines of the dc or ac voltage V applied between the film electrodes, such that voltage acting on portions of the channel, estimated using the formula V(w/L)tg?, is established depending on the properties of the selected phosphors and the electron emitter.EFFECT: wider spectral range, controlling spectral characteristics, high efficiency of electron-photon and electro-optical conversions.4 dwg |
