A New Nano-Cold Cathode Array Electron Gun

Abstract

The invention belongs to the technical field of vacuum electronics, and specifically provides a novel nano-cold cathode array electron gun, comprising: a base, N first anode units, a cathode plate, a second anode plate, an upper insulating sleeve and a lower insulating sleeve, a plurality of The first anode units are evenly distributed on the base, the cathode plate is provided with rounded truncated truncated holes, the inner inclined surface of each rounded truncated hole is laid with a nano-cold cathode emitting surface, and the second anode plate is provided with circular holes , the inverted truncated truncated holes and the circular holes are in a one-to-one correspondence with the N first anode units. The array electron gun of the present invention does not need to apply a magnetic field near the cathode, which greatly simplifies the structure of the entire electron gun array, and by effectively adjusting the voltages of the first anode and the second anode, the electron beams formed by the array electron gun of the present invention can be effectively adjusted. The size of the cross-section radius, and even the formation of a solid electron injection, enables the electron of the present invention to be widely used in various electric vacuum devices.

Description

technical field [0001] The invention belongs to the technical field of vacuum electronics, relates to microwave, millimeter wave, and terahertz wave radiation source technologies, and specifically provides a novel nanometer cold cathode array electron gun. Background technique [0002] As an indispensable core device of military electronic systems such as radar, electronic countermeasures, and space communication, electric vacuum radiation sources have been widely valued. The electron gun in the traditional electric vacuum radiation source device generally adopts the thermal cathode emission system. After decades of development, the technology of the thermal emission cathode has been very mature and is widely used in various electric vacuum radiation source devices, but the thermal emission cathode There are the following significant disadvantages: complex structure, high cost, the cathode system is composed of a variety of metal and ceramic components, because the hot catho...

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Problems solved by technology

The electron gun in the traditional electric vacuum radiation source device generally adopts the thermal cathode emission system. After decades of development, the technology of the thermal emission cathode has been very mature and is widely used in various electric vacuum radiation source devices, but the thermal emission cathode There are the following significant disadvantages: complex structure, high cost, the cathode system is composed of a variety of metal and ceramic components, because the hot cathode works in a high temperature environment of thousands of degrees, the heating filament in the cathode is easy to break or short circuit, resulting in device damage; in addition On the one hand, due to the need for heating power, the complexity of the system is increased, the efficiency of the system is reduced, and it takes a long time to reach the operating temperature. Especially for high-power devices, the startup time is often as long as several minutes, which brings great inconvenience to the use. Great inconvenience; at the same time, due to the complex structure of the hot cathode is also one of the main reasons why it is difficult to integrate the electric vacuum radiation source

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