Abstract: A dielectric waveguide ferrite resonance isolator capable of operating in e millimeter wave frequency range in a dielectric waveguide transmission line in which a thin rectangular hexagonal ferrite material is affixed to a side of the dielectric waveguide and then placed between the pole pieces of an electromagnet in order to magnitize and fully orient the ferrite material is improved by positioning a grooved block of dielectric having a low dielectric constant and high thermal conductivity against the face of the hexagonal ferrite so as to use the high thermal conductivity dielectric as a heat sink thereby extracting heat from the hexagonal ferrite.

Abstract: The aging rate of an oscillator is minimized by applying a high drive current to the resonator early in the oscillators life until the aging rate decreases to a low value and then applying a low drive current to the resonator for the rest of the oscillators life at a constant temperature.

Abstract: Carbon black powder is pretreated with acetone or methanol prior to cathode abrication to improve the cathode operating voltage and increase the cathode life of lithium sulfuryl chloride electrochemical cells.

Abstract: The air gap in the joints between millimeter wavelength, dielectric waveguide circuit components is filled with a slurry made from an inorganic dielectric, such as barium titanate; and an organic binder, such as cellulose nitrate. The proportions of the dielectric and binder are taken so as to have a composite dielectric constant the same as that of the components being joined. This removes breaks or discontinuities and in turn reduces the insertion loss at the joints.

Abstract: A porous carbon cathode for use in an electrochemical cell is made by wetg the carbon black with a 1:1 to 1:3 mixture of isopropyl alcohol:water, adding a binding agent thereto, smearing the resulting stiff paste on a thin expanded metal screen and pressing and rolling to the desired thickness, drying the cathode sheet in a vacuum oven at about 100.degree. C. for one hour while a weight is placed above and below the cathode sheet which is sandwiched between two pieces of blotting paper, the total weight applied being sufficient for the cathode to retain structural integrity, removing the weight and blotting papers and inserting the cathode sheet in an elevated drying oven at about 280.degree. C. for about one hour, and cooling the cathode sheet between blotting paper, repressing and rolling. Cathodes prepared by this method appear structurally strong, maintain their physical integrity with a minimum of cracking and flaking, and do not crumble when cut.

Abstract: Gamma radiation is detected by placing iron doped glass in an environment bject to gamma radiation and then measuring any color change in the doped glass as a function of gamma radiation.

Abstract: A radiochromic leuko dye dosimeter includes a plastic tube containing a solution of a radiochromic dye which is sensitive to ionizing radiation, one end of the tube being closed by a reflective surface, the opposite end of the tube being closed by a transparent plug to form a one-way optical waveguide. Light enters the tube through the transparent end thereof and is reflected back and exits through the transparent end. The intensity of the exiting light is measured to determine radiation induced absorption of the leuko dye.

Abstract: A high energy ambient temperature inorganic electrochemical power cell is provided comprising calcium metal alloyed with about 10 percent of either zinc or antimony as the anode, high surface area carbon black as the cathode and a solution of calcium tetrachloroaluminate or lithium tetrachloroaluminate in sulfuryl chloride or thionyl chloride as the electrolyte.

Abstract: Optical fibres are protected against stress corrosion by first coating the ptical fibre with a primary coating of an ultra violet curable cis, trans fluoropolyolacrylate in which the modulus is reduced by eliminating about 25 percent of the pendant ester groups, curing the primary coating, applying a secondary coating of a high modulus heat curable fluoroepoxy or a high modulus UV curable cis trans fluoropolyolacrylate over the primary coating and curing the secondary coating.

Abstract: A dielectric waveguide ferrite resonance isolator capable of operating in the millimeter frequency range in a dielectric waveguide transmission line is provided. The isolator comprises a thin sheet of hexagonal ferrite material that has been affixed to a side of the dielectric waveguide and then placed between the pole pieces of an electromagnet in order to magnetize and fully orient the ferrite material.

Abstract: A dielectric waveguide reciprocal ferrite phase shifter is provided for use n a dielectric waveguide transmission line. The phase shifter is comprised of a length of ferrite of the same cross-sectional dimension as that of the dielectric waveguide and in fact becomes a section of the transmission line. The length of ferrite bears a thin plastic layer on its top and bottom surface and metal plates on each piece of plastic. The length of this multilayer structure then has a wire coil wrapped around in order to provide a d.c. magnetic biasing field along the length of the ferrite thereby enabling magnetization of the ferrite resulting in a reciprocal phase shift or change in electrical length within the structure.

Abstract: The acceleration sensitivity of an AT-cut quartz crystal plate resonator is educed by replacing the quartz crystal plate of the resonator with a quartz crystal plate having a flatter plate contour.

Abstract: A method is disclosed of operating a cold-cathode-cold-reservoir thyratron for laser/radar and other systems employing high voltage and current pulses using ZrVFe as the hydrogen thyratron material. According to the method, a hydride of ZrVFe is first formed and the hydrided material then placed in the cathode structure of the thyratron. The tube is then pumped down to its operating pressure of approximately 10.sup.-3 atmospheres, the hydrided material then acting as a ballast to maintain that partial pressure of hydrogen at room temperature.

Abstract: A high current density cathode is made by first forming an active porous h purity tungsten pellet by the steps of:(A) mixing tungsten powder with about 1 to 5 percent by weight of the mixture of an activator powder and compacting the powders at a pressure of about 35 tons per square inch to form a pellet,(B) sintering the pellet in a non-oxidizing atmosphere at about 1800 degrees C. for about 11/2 to 31/2 hours to the desired porosity,(C) filling the porous pellet with a filler material,(D) machining to the desired size and shape,(E) removing the filler material, and then forming the cathode by impregnating the pellet with Ba.sub.5 Sr(WO.sub.6).sub.2 at about 1700 degrees C. in an inert atmosphere and subsequently firing for 2 minutes at 1800 degrees C. in dry hydrogen.

Abstract: The thermal properties of a crystal resonator are rapidly and inexpensively measured by first immersing the resonator into an ice water bath at 0.degree. C. and monitoring the frequency of the resonator until the frequency of the resonator is no longer changing; then rapidly immersing the resonator into a boiling water bath at 100.degree. C. and monitoring the frequency versus time characteristic of the resonator at least until the frequency of the resonator is no longer changing; repeating the above cycle, and determining the thermal properties of the crystal resonator from the frequency versus time characteristic.

Abstract: An acceleration resistant crystal resonator is made from a single quartz te that is optically twinned into a left-handed (LH) quartz portion and a right-handed (RH) quartz portion. According to the method, the optically twinned single quartz plate is formed into a resonator plate wherein the effective thickness of the (LH) portion is substantially the same as the effective thickness of the (RH) portion. The resonator plate is then mounted and bonded to the support structure of a crystal resonator enclosure. A pair of electrodes is then deposited onto the (LH) portion and a pair of electrodes deposited onto the (RH) portion. The thickness of the two pairs of electrodes is then adjusted so that the resonant frequency of the resonator on the (LH) portion is substantially the same as the resonant frequency of the resonator on the (RH) portion. The pairs of electrodes are then interconnected to each other and to an oscillator circuit so that in-phase vibration of the two portions is assured.

Abstract: Smooth layers of a metal are produced on a glass substrate where a large ferential expansion coefficient of the metal relative to the substrate produces very large stresses in the metal when the metallized substrate is subjected to a post deposition anneal. The method involves depositing a layer of a metal having a very small self diffusion coefficient at the anneal temperature prior to depositing the metal having the large differential expansion coefficient.

Abstract: An optical waveguide dosimeter for personnel dosimetry is provided including a liquid solution of leuko dye hermetically sealed in plastic tubing. Optical transport is improved by dipping the ends of the plastic tubing into clear epoxy, thus forming beads that serve as optical lenses. A layer of clear ultraviolet absorbing varnish coated on these beads and an opaque outer layer over the plastic tubing provides protection against ambient UV.

Abstract: A high strength, lightweight composite wire is made by intercalating grape fiber with a material that will impart high electrical conductivities to the fiber. The intercalated fiber is coated with a wetting agent and the coated intercalated graphite fiber then placed in a molten bath of magnesium or a low melting magnesium alloy. A composite wire is then produced by extrusion through a suitable die.

Abstract: An improved high energy electrochemical power cell is obtained by adding cupric chloride to the high surface area carbon black cathode of a lithium-inorganic electrolyte cell.