Abstract: Magnet assembly having a magnet yoke formed of a magnet material and providing a generally rectangular opening and having first and second spaced apart parallel pole faces which are facing each other. First and second coil assemblies are disposed in the opening in the yoke. Each coil assembly comprises first and second spaced apart generally parallel bundles of nested U-shaped members formed of conducting material. The bundles have legs at opposite ends. First and second sets of cross pieces are bonded to the legs of the U-shaped members. Insulating material is disposed between the U-shaped members and the cross pieces so that the bonded together U-shaped members and the cross pieces form a continuous current conductor for each coil assembly.

Abstract: Proximity focused streak tube having a photocathode for converting photon images from a source into photoelectrons. A phosphorous screen is provided for receiving the photoelectrons. The photocathode and the screen define a longitudinal tube axis. A channel plate is provided having a plurality of substantially parallel bores that are disposed in close proximity to the photocathode so that the bores in the channel plate are inclined at an angle with respect to the longitudinal tube axis. A voltage source supplies a voltage difference between the photocathode and the channel plate to cause electrons to be extracted from the photocathode and to be accelerated through the bores in the channel plate. The bores in the channel plate are inclined at an angle in such a manner so that there cannot be a direct feedthrough of X-rays to the phosphorous screen and also preventing a direct feedthrough of visible light.

Abstract: Proximity focused streak tube having a photocathode for converting photon images into photoelectrons. A phosphorous screen is provided for receiving the photoelectrons. The photocathode and the phosphorous screen define a longitudinal tube axis. A passive channel plate is provided which has a plurality of parallel bores therein. The channel plate is disposed in relatively close proximity to the photocathode and so that the bores are inclined at an angle with respect to longitudinal tube axis so as to minimize feedthrough of visible photons. A source of voltage is connected between the photocathode and the passive channel plate causing the photoelectrons to be extracted from the photocathode and to pass through the bores in the channel plate. First and second spaced apart beam electrodes are disposed between the channel plate and the phosphorous screen.

Abstract: A shutter for a proximity focused tube and camera comprising an array of stacked microchannel plates. An electrode is provided between each plate whereby an electrical field can be established across each plate. By applying a ramp voltage to alternate plates in the stacked array, the electric field across each plate deflects a photoelectron beam and allows a momentary period of transmission of the beam through the microchannels. The electrode on each plate is skewed with respect to the front and back faces of the plate whereby in-phase deflection of an electron beam is achieved. A plurality of proximity focused shutter tubes can be operated in an array and triggered from a common voltage pulse source whereby a pulse is applied in a time ordered sequence to develop related multiple frames.