Permanent magnet focusing radial high current electron beam diode

Abstract

The invention discloses a permanent magnet focusing radial high-current electron beam diode, aiming at solving the problem of stable transmission of the radial electron beam and overcoming the instability of lateral offset. The present invention has a rotationally symmetrical structure and is composed of a cathode base, a cathode permanent magnet, an electron emission disk, a diode anode, and an anode permanent magnet; the cathode permanent magnet is embedded in the cathode base, and the electron emission disk is placed on the cathode permanent magnet. Between the two ring-shaped permanent magnets, the diode anode is outside the cathode base and the electron emission disk, and the diode anode, cathode base, cathode permanent magnet and electron emission disk are coaxial; the two anode permanent magnets of the anode permanent magnet Set on the outer wall of the diode anode cylinder, two anode permanent magnets are symmetrically installed on the right side of the radial line channel of the diode anode. The invention can generate a radial guiding magnetic field greater than 0.4T in the electron beam transmission channel, and ensure the stable transmission of the high-current electron beam.

Description

technical field [0001] The invention relates to a high-current beam diode in the field of high-power microwaves, in particular to a radial high-current electron beam diode with permanent magnet focusing. Background technique [0002] In radial high-power microwave devices, as the electron beam moves in the radial direction, the space charge effect gradually decreases, the size of the high-frequency structure gradually increases, and the power capacity will be effectively improved. In addition, the radial high-power microwave device also has the characteristics of low impedance, which is conducive to the improvement of the output microwave power. Therefore, radial high-power microwave devices have great potential for development. [0003] The concept of radial high-power microwave generator was originally proposed by Arman scholar of Phillips Laboratory in the United States [HighPower Radial Klystron Oscillator. SPIE proceedings, Vol.2557, San Diego, USA, 1995, 21~31. Micro...

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Problems solved by technology

However, problems such as high energy consumption, bulky volume, and complicated auxiliary power supply equipment also restrict the application of high-current coils to excite magnetic fields in radial high-power microwave devices.

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