Abstract: It is an object of the invention to provide a spent particle collector which will maintain its structural integrity when raised to a high temperature although constructed of materials having widely different coefficients of expansion. The collector is comprised of one or more axisymmetric stages, each stage comprising a subassembly. A subassembly includes an inner pyrolytic graphite ring, a transition ring, a ceramic insulator ring and an outer metal ring which forms part of the wall of the collector. Each transition ring is of a ductile metal having high thermal conductivity and is provided with an annular sputter shield wall extending toward the source of spent particles and, where necessary, a trough in the other surface to enclose the sputter shield of the next adjacent transition ring. A plurality of radial extending slots are provided in a transition ring to form segments which are retained in their position by the sputter shield.

Abstract: A process for fabricating metal halide discharge lamps wherein a tungsten rod has a pair of spaced starting coils attached thereto and is connected to an electrical conductor. A pair of notches are ground in the tungsten rod adjacent and intermediate the attached coils and the tungsten rod is sealed into a quartz envelope. A laser beam is focused onto the notches of the tungsten rod through the quartz envelope to sever the tungsten rod and provide an arc gap of a given uniform length.

Abstract: In making electrode construction for multiple cathode type flat cathode ray tube, a plural number of parallel strip electrodes are connected to form one sheet by means of connecting means 21, 21 . . . provided between neighboring strips. The connecting means are ribs extending laterally (i.e., in a direction of right angle to said strips from the strip electrodes 33, 33 . . . or 36, 36 . . . . The composite parallel strips formed by connecting by the connecting means are formed by photolithographic process from an Ni-Cr-Fe sheet. The connecting means are cut out by impingement of high energy beams (of laser or electron) after bonding the composite parallel strips onto another higher rigidity electrode member.

Abstract: A method for fabrication of an image pickup tube face plate structure comprises adhering a transparent glass sheet material having a thickness of about 40 to 80 microns to a color separation stripe-shaped filter formed on a face plate of the tube, and forming an optically polished surface on a top of the glass sheet while reducing the distance between the top and the stripe filter surface to about 40 microns or less.

Abstract: A temporary faceplate is bonded to an assembled (except for retina) vidicon ube. The tube is baked under vacuum pumping at high temperature to cause evaporation or outgassing of contaminants. After cooling, the tube is placed in an inert atmosphere and the temporary faceplate is exchanged for a pyroelectric faceplate. Vacuum is again pumped and the end of the tube containing the electron gun electrodes and the other electrodes is baked for degassing the electrodes. Still under vacuum pumping, the getters and the cathode of the electron gun are heated to activate them, the retina is activated with anode current by applying voltages to the electron gun and the acceleration electrodes by applying focus and sweep fields to the tube, the getters are fired, and the anode current is used to electron beam scrub the retina and other electrodes. Finally, the tube is tipped-off.

Abstract: A rugged retina is constructed for a vidicon having a rugged electron gun d other electrodes. The retina is prepared by mounting it between two thin flexible metal or metalized rings with a high viscosity liquid electrode between one of the rings and the retina. This prepared assembly is glued together and onto the vidicon faceplate with a pliant adhesive.

Abstract: A method is disclosed to fabricate a cathode electrode for a continuous wave magnetron so that the resulting product is relatively free from random frequency modulation and frequency "pushing". The method generally comprises the steps of forming, from a slurry containing comminuted tungsten and thorium hydride, a cathode electrode of the desired shape and heat treating such cathode to remove all volatile elements and ultimately to form a cathode electrode made up of an eutectic mixture of tungsten and thorium particles of tungsten.

Abstract: A method of manufacturing light detection units which comprise a photocathode disposed on an entrance window, an electron detector including a semiconductor junction, and means which transmit the electrons from the photocathode to the electron detector including a perforated aperture plate disposed between the entrance window and the electron detector. The photocathode is formed on a surface of the entrance window after assembling the entrance window and electron detector to the means which transmit the electrons. Perforations in the aperture plate are covered with spherical shields while the photocathode is formed on the surface of the entrance window. The shields are then removed.