A High Power Gyrotron Anode Spike Current Active Avoidance Overcurrent Protection Device

Abstract

The invention belongs to the field of plasma heating, and specifically relates to a high-power gyrotron control and protection system in an electronic cyclotron resonance heating system, which is mainly composed of a current sensor, a voltage comparator, a latch, a combination logic, a microcontroller, an optical fiber, and an optical fiber communication system. Module composition; the current sensor converts the current signal of the anode loop into a voltage signal; the voltage signal is compared with two thresholds by the voltage comparator, and the overcurrent protection threshold will output a high voltage during the peak current of the anode and the overcurrent period during normal operation. level; the other threshold judges the opening state of the anode circuit, and outputs high level during the peak current period and normal operation period, and outputs low level when the anode voltage is not added; then these two digital logic signals are sent to the latch and Combination logic for processing, the combination logic outputs low level during the peak current period, and outputs high level during normal operation and when the anode circuit is overcurrent; thus judging the peak current and normal working time.

Description

technical field [0001] The invention belongs to the field of plasma heating, in particular to a high-power gyrotron control and protection system in an electron cyclotron resonance heating system. Background technique [0002] Electron cyclotron resonance heating is an important heating method in the study of magnetic confinement fusion. The HL-2A device is equipped with a 3MW electron cyclotron resonance heating system. The physical realization of studying plasma transport and suppressing magnetic fluid instability requires high-frequency modulation of electron cyclotron wave power. [0003] By modulating the anode voltage of the gyrotron, the output microwave power can be modulated. During the opening process of the anode voltage, the distribution parameters of the anode circuit cause the anode circuit to have a power-on peak current that is several times the normal operating current. The faster the anode voltage rises, the greater the peak current. In order to protect...

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