Abstract:
In a microwave tube, an improved collector surface coating comprises a porous carbon composite material, preferably a carbon-bonded carbon fiber composite having a bulk density less than about 2 g/cc. Installation of the coating is readily adaptable as part of the tube manufacturing process.
Abstract:
A method for manufacturing a metal cylinder of an electron tube, such as a magnetron, comprises the steps of rolling a metal plate into a cylinder, reduction-forming the cylinder, welding the seam of the reduction-formed cylinder by means of a high-energy beam, and compression-forming the resulting cylinder in the axial direction while restricting the inner and outer peripheral surfaces thereof. The step of beam welding the seam includes arranging a plurality of cylinders to be subjected to the welding lengthwise, so that the adjacent ends of the cylinders are in intimate contact with one another, whereby the respective seams of the cylinders extending in a straight line are subjected in succession to the beam welding. The power of the high-energy beam irradiated onto the seam of each cylinder is controlled so as to be higher in the initial stage of the application to each cylinder and lower in the later stage. A magnetron anode is therafter made by completing an anode cylinder, and radially fixing a plurality of anode vanes to the inside of the anode cylinder. The high-energy beam for welding is irradiated diagonally to the longitudinal plane of the seam.
Abstract:
The invention relates to a structure for an anode of a magnetron and to a method for manufacturing the same. This structure has a cylindrical outer frame portion and a plurality of vanes which are integrally formed with the outer frame portion and which radially extend from the inside of the outer frame portion in the central direction of the cylindrical outer frame portion. Projecting portions of predetermined shapes are formed on the inner wall of the outer frame portion or on the vanes so as to be integrated with the outer frame portion or vanes.
Abstract:
Microwave oscillators and amplifiers which utilize a superconducting slow-wave circuit. The slow circuit is made from materials which exhibit superconductivity at relatively high critical temperatures. The slow wave circuit is integral with the device's vacuum housing. Coolant exterior to the vacuum housing maintains the circuit in the superconducting state. The slow-wave circuit, which protrudes into the vacuum housing provides modulation of an electron beam which traverses the interior of the vacuum housing. Output power is ultimately extracted from the slow wave circuit.
Abstract:
A tubular blank from which a slow-wave structure is to be formed is mounted on a mandrel in front of and spaced slightly from an electrode having a predetermined pattern of slots corresponding to areas along the tubular blank from which material is not to be removed. The blank and the electrode are connected to an electrical discharge machine to establish electrical discharges between the blank and the electrode, and the mandrel and the blank carried thereby are simultaneously advanced and rotated past the electrode. Portions of the blank adjacent to the non-slotted surface portions of the electrode are removed, while the portions of the blank adjacent to the slots in the electrode are retained.
Abstract:
A switching regulator includes a chopper circuit and a DC-DC converter. A switching signal for use with the chopper circuit is derived from an inverter portion of the DC-DC converter so as not to use an external pulse oscillator. A DC voltage feeback circuit is provided from the output of the DC-DC converter to the chopper circuit so as to stabilize the DC output signal of the DC-DC converter.