Abstract
In order to reduce the size of high impedance diodes and magnetic energy consumptions, a high impedance intense current diode is designed in this paper. By reducing the center radius of the cathode and utilizing the gradient magnetic field, the electron beam is emitted in the cathode with a small radius and transmitted in the drift tube with a large radius. The influence of magnetic field distribution on the electron beam transmission is analyzed by particle-in-cell simulation. When the diode voltage is 680 kV, the impedance is 77 Ω, and the cathode radius is 60 mm, the anode radius of the traditional diode is 116 mm and the cathode–anode axial gap is 57 mm. At the same voltage and impedance, the cathode radius of the novel diode is 38 mm, the anode radius is reduced to 80 mm, and the cathode–anode axial gap is shortened to 36 mm. Further application of the novel diode to a relativistic triaxial klystron amplifier device shows that the output power of the novel diode is the same as that of the traditional diode. Through simple quantitative analysis, it is found that the magnetic energy consumption of the novel diode is less than that of the traditional diode. To sum up, the novel diode can achieve good performances in a smaller volume than the traditional diodes.
Highlights
High-power microwave (HPM) devices generally use pulsed power devices to drive intense current diodes, and intense relativistic electron beams are generated by the explosive emission of the diode cathode
To reduce the size of the high impedance diode and the magnetic energy consumption in the overmoded HPM device, a largeradius high impedance intense current diode is designed in this paper, which changes the state that the center radius of the diode cathode has to be strictly consistent with the center radius of the electron beam transmission channel
The center radius of the electron beam is the same as that of the drift tube, and they are determined by the power capacity of the HPM device
Summary
High-power microwave (HPM) devices generally use pulsed power devices to drive intense current diodes, and intense relativistic electron beams are generated by the explosive emission of the diode cathode. In order to obtain higher output power, the overmoded electromagnetic structure and coaxial drift tube with a large radius are usually adopted to reduce the surface electric field and improve the power capacity.. There are two main methods to improve the impedance of the diode: (1) increasing the distance between the anode and the cathode of the diode is the most common and simple method It greatly increases the radial size of the diode, resulting in the increase in the device volume and magnetic energy consumption. To reduce the size of the high impedance diode and the magnetic energy consumption in the overmoded HPM device, a largeradius high impedance intense current diode is designed in this paper, which changes the state that the center radius of the diode cathode has to be strictly consistent with the center radius of the electron beam transmission channel..
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
