An Axial Foilless Diode Composite Guided Magnetic Field System

Abstract

The invention discloses an axial foil-free diode composite guiding magnetic field system, which comprises an insulator, an anode cylinder, an annular cathode, a drift tube, a solenoid, a magnet column and a permanent magnet ring, wherein the solenoid, the magnet column and the permanent magnet ring are installed at the outer side of the drift tube in an enclosing mode; one side of the drift tube is provided with the annular cathode, and the other side of the annular cathode is connected with one end of the magnet column; and the other end of the magnet column penetrates through the permanent magnet ring and the insulator and is connected with the external part. According to the invention, stable and efficient transmission for electron beams in the axial direction is realized through using the permanent magnet ring, the solenoid and the soft magnet in a combination mode. In addition, the system disclosed by the invention is compact in structure, light in weight and low in power required to be consumed, and the generated magnetic field distribution can be adjusted conveniently.

Description

technical field [0001] The invention relates to the field of magnetic field guidance, in particular to an axial non-foil diode composite guiding magnetic field system formed by a combination of a permanent magnet ring, a solenoid and a soft magnet. Background technique [0002] In the process of practical development of high power microwave source system, the high efficiency and miniaturization of the system is a crucial factor. In order to achieve this goal, in addition to striving to improve the design level of microwave devices to improve their work efficiency, optimization and improvement of systems such as electron beam sources and guiding magnetic fields are also important directions. Axial foil-free diodes are commonly used in high-power microwave sources, and their guiding magnetic field systems mainly include solenoids, superconducting magnetic fields, and permanent magnetic rings. Among them, the superconducting magnetic field system has high manufacturing and ope...

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Problems solved by technology

But this will inevitably lead to a waste of the magnetic field at the end of the solenoid, and a small amount of backflow electrons will move in the opposite direction along the magnetic field lines at the end, and it is easy to bombard the insulator and cause insulation damage or bombard the anode cylinder to cause electron energy loss.

In addition, in order to meet the withstand voltage requirements, a large distance needs to be maintained between the inner wall of the solenoid and the cathode rod, resulting in a large volume, weight, and energy consumption of the solenoid and its auxiliary power equipment, which is not conducive to the application of mobile platforms

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