A device and method for generating a flat-topped pulsed strong magnetic field for a terahertz gyrotron

Abstract

The invention provides a flat top pulse strong magnetic field generating device and method for a terahertz gyrotron, including: before discharging the magnet, charging and storing energy to the supercapacitor bank and the first high-voltage capacitor bank; when discharging the magnet, firstly controlling the first high voltage The capacitor bank discharges the magnet; when it is detected that the magnet current reaches the set value, the multi-phase interleaved parallel DC / DC converter starts to work, and the super capacitor bank discharges the magnet through the multi-phase interleaved parallel DC / DC converter, according to the first high voltage The terminal voltage of the capacitor bank and the magnet current are state-controlled, and the duty cycle of the PWM control signal of the multi-phase interleaved parallel DC / DC converter is changed to perform negative feedback control on the magnet current to offset the influence of the voltage drop of the supercapacitor bank and the increase of the internal resistance of the magnet , to stabilize the magnet current at the set value; when the set flat-top duration is reached or an abnormal situation occurs, the multi-phase interleaved parallel DC / DC converter is turned off. The invention improves the comprehensive performance of the flat-top pulsed magnetic field.

Description

technical field [0001] The invention belongs to the technical field of pulse power, and more specifically relates to a flat top pulse strong magnetic field generating device and method for a terahertz gyrotron. Background technique [0002] Terahertz waves are electromagnetic waves with frequencies ranging from 0.1 THz to 10 THz. They have the characteristics of high frequency, large bandwidth, strong transmittance, high spectral resolution, and strong biocompatibility. . Terahertz source is the core foundation of terahertz technology. Among many terahertz source solutions, the gyrotron terahertz wave source based on pulsed strong magnetic field (hereinafter referred to as pulse field gyrotron) can generate terahertz waves with higher limit frequency and power. It is one of the very promising terahertz source schemes. However, limited by the waveform of the pulsed magnetic field, the radiation time of the existing pulsed field gyrotron is less than 0.5 ms, and its stabilit...

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Problems solved by technology

[0009] Aiming at the defects of the prior art, the purpose of the present invention is to provide a flat-top pulse strong magnetic field generator and method for a terahertz gyrotron, aiming at solving the problem that the existing flat-top pulsed magnetic field is difficult to take into account the stability and flat-top duration. Relatively small and inefficient, making it difficult to apply in terahertz gyrotrons

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