摘要:
1. An electron multiplier comprising wall means of secondary electron emissive material defining a spiral passage, means for providing a current flow through said wall means to supply electrons for secondary emission, a resistance means provided in said wall means and connected in parallel across a portion of the spiral passage defined by said wall means to provide more uniform current multiplication along said passage length.
摘要:
A miniature flat panel image intensifier tube display device using two inne microchannel plate (MCP) electron multipliers that have two arrays of orthogonally positioned electrically isolated parallel metallic stripes as electrodes on their interfacing surfaces and have the conventional continuous electrodes on the other two surfaces. A solid photocathode layer is in proximity focus with the solid input electrode of the first MCP, and the solid output electrode of the second MCP is in proximity focus with a display device. Array switching electronic means selectively switches bias voltages in some selected scan mode over the two arrays of MCP metallic stripes to provide a selective electron charge pattern exiting the second MCP wherein the charge pattern is converted to a visible image at the display device.
摘要:
A display device using a microchannel plate electron multiplier with a set of fine, closely spaced, parallel continuous metallic lines deposited on each side of the microchannel plate with each set of metallic lines being perpendicular to each other. An input sequential switcher and an output sequential switcher have voltage differentials that are separately swept across each set of lines such that when the voltage differentials are applied on directly opposite sides of the microchannel plate, while the regular bias voltage is applied across the MCP, there is high electron gain. A photoemissive panel, emitting a uniform flow of electrons therefrom, is positioned adjacent the input set of metallic lines, and a luminescent screen, such as phosphor, is positioned adjacent the output set of metallic lines for displaying an image according to electron flow caused by the differential sequential switching voltages.
摘要:
A secondary electron multiplying device having high sensitivity for various kinds of electrically charged particles (e.g. electrons, positive ions, negative ions), X-rays, radio active rays, etc., is made of a molded article of a zinc oxide-titanium oxide type semiconductor ceramic, and is provided with at least two electrodes and having at least one hole. The molded article of the device can be produced in form of a single tube or a bundle of a plurality of such tubes. Electrons fed into the tube or tubes impact with the semiconductor ceramic causing secondary electron emission and the number of electrons emitted is greater than the number of electrons fed into the device.
摘要:
In an electron emissive device having electron multiplying dynodes, the dynode surfaces upon which the electrons impinge are provided with a layer of antimony activated with cesium and potassium.
摘要:
Described herein is an electron generating device comprising a tubular member whose inner walls are covered with a resistive, secondary-electron emissive coating. One section of the tubular member is curved and extends between electrical contacts provided on the secondary-electron emissive coating. Another section of the tubular member is substantially straight. It too, extends between the electrical contacts, and forms, together with the curved section, a continuous, reflex-type particle path around the tubular member. An electron exit aperture is provided near one of the contacts and a D.C. power supply is connected to the contacts. Electrons are multiplied or amplified along the curved section of the tubular member and resulting positive ions are fed back along the straight section to liberate further electrons for amplification. Electrons egress through the exit aperture in a defined path. For enhanced electron beam generation, a tubular, toroidal-shaped embodiment of the invention is also described.
摘要:
A continuous dynode electron multiplier for detecting and multiplying charge flow in a vacuum. Continuous dynodes are deposited on thermally conductive substrates. Heat sinks attached to the substrates permit operation of the multiplier at high current levels without the threat of thermal runaway. Further, the method of making the continuous dynodes includes depositing from a composite source, whereby the dynode resistance can be accurately controlled.
摘要:
A television-type display which utilizes a special scanning mode in combination with a picture tube including a channel-type electron multiplier and a continuous primary electron source for all the holes therethrough. The electron multiplier has channels or holes across which two sets of insulated conductive strips extend. One set is perpendicular to the other. One strip of each pair is supplied with a voltage to allow only one hole at a time in the electron multiplier to emit electrons. Scan is thereby effected. Intensity may be controlled by applying a suitable voltage between perforate conductive layers bonded to opposite sides of the electron multiplier or the strips themselves. A semiconductive coating may be used on the internal surfaces of the holes of the electron multiplier to provide for large current pulses while maintaining a high gain. A unique double layer conductive electrode arrangement is provided at one end of the channels of said multiplier.
摘要:
An electron multiplier device. A solid body of barium titanate semiconducting ceramic is formed into a tube or plurality of tubes and at least two electrodes are positioned at spaced points on the tube. The ceramic has a resistance-temperature characteristic which is other than negative, i.e. zero or positive. The device can be used in form of a single tube, or a plurality of such tubes can be bundled together. Electrons fed into the tube or tubes impact with the semiconducting ceramic causing secondary electron emission and a greater number of electrons are emitted than are fed to the device.
摘要:
An electron multiplier having a plurality of dynodes wherein each dynode includes two wire layers located in staggered relationship with one another and wherein each of the dynodes is located with a first one of its wire layers aligned with the immediately adjacent wire layer of an immediately preceding dynode and with its second wire layer aligned with the immediately adjacent wire layer of an immediately following dynode. The wires in each layer of each of the dynodes are spaced so that the open space between them is less than the diameter of the wires, with the exception of the first wire layer in the first dynode wherein the wires may be of a noncircular cross section or of a smaller diameter and wherein they are spaced apart by a distance greater than the diameters thereof.