Abstract: An engine system for an aircraft includes an engine and a gearbox. The engine is mounted in a nacelle region of the aircraft. The gearbox is coupled to the engine, and is mounted in a fuselage region of the aircraft. The fuselage region is separated from the fuselage region by a structure.

Abstract: An ion laser includes a plurality of thin refractory metal disk members with the perimeter of the disks embedded directly into a ceramic plasma tube. A central aperture is formed in the middle of each disk, and a plurality of apertures are formed around the periphery of the disk. In the fabrication process, ceramic powder is compacted to form an outer plasma tube. Two separate tubes, each with electrodes and embedded washer ends, can be formed and fused to form a single tube. The disks (with the surrounding compacted ceramic disposed around the periphery of the disk) are stacked within the plasma tube and the green ensemble of ceramic and metal is fired in only one furnace step with controlled atmospheres. Hermetic cathode and anode electrodes are also formed in the same firing through the plasma tube. Ends are sealed with a mirror-mount of the Brewster window structure, in one embodiment either laser welded or soldered to a refractory metal end disk embedded in the green ceramic at the ends of the tube.

Abstract: An ion laser includes a plurality of thin refractory metal disk members with the perimeter of the disks embedded directly into a ceramic plasma tube. A central aperture is formed in the middle of each disk, and a plurality of apertures are formed around the periphery of the disk. In the fabrication process, ceramic powder is compacted to form an outer plasma tube. Two separate tubes, each with electrodes and embedded washer ends, can be formed and fused to form a single tube. The disks (with the surrounding compacted ceramic disposed around the periphery of the disk) are stacked within the plasma tube and the green ensemble of ceramic and metal is fired in only one furnace step with controlled atmosphere. Hermetic cathode and anode electrodes are also formed in the same firing through the plasma tube. Ends are sealed with a mirror-mount of the Brewster window structure, in one embodiment either laser welded or soldered to a refractory metal end disk embedded in the green ceramic at the ends of the tube.