High voltage nanosecond pulse trigger used for hydrogen thyratron

Abstract

The invention discloses a high voltage nanosecond pulse trigger used for a hydrogen thyratron. The high voltage nanosecond pulse trigger comprises a charging power supply, a pulse forming circuit, a PFN network, and a filament heating circuit. The charging voltage of the energy storage capacitor of the pulse trigger is low, and a problem that high voltage is required by a common pulse trigger isolating a primary side of a transformer is well solved, and then the pulse trigger is compact and miniaturized. A pulse forming circuit adopts a rapid IGBT used as a switch used for switching on and switching off, and output pulse jitter is small, an amplitude is stable, and at the same time, a required IGBT voltage-withstanding value is low, and costs are low. The output pulse of the pulse trigger passes the PFN network, and cascaded capacitance, cascaded inductance, and cascade number are adjusted conveniently, and therefore the rising time and the pulse width of the output pulse are changed conveniently. The pulse trigger is integrated with a hydrogen thyratron filament heating circuit, and the current of the circuit is adjusted accurately, and dozens of kV high voltage are isolated at the same time. The pulse trigger adopts suspension output, and is capable of satisfying requirements of different occasions on the positive pulse and the negative pulse.

Description

technical field [0001] The invention belongs to the technical field of pulse power, in particular to a high-voltage nanosecond pulse trigger applied to a hydrogen thyratron. Background technique [0002] The hydrogen thyratron is a pulse power discharge device, which is mainly composed of five parts: anode, grid, cathode, hydrogen storage and ceramic shell. It converts the energy stored in the high-voltage capacitor and the like into a high-power pulse output instantaneously during the pulse period. It has the advantages of high working voltage, large pulse current, simple pulse modulation circuit, light weight, small size, etc. It is widely used in scientific research, military, medical fields and civilian high-tech products. The conduction of the hydrogen thyratron is mostly triggered by pulses with high amplitude, steep front, and low jitter. Therefore, the pulse amplitude, rise time, and jitter of the pulse trigger directly affect the conduction time of the hydrogen thyr...

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Problems solved by technology

[0003] Most of the existing hydrogen thyratron pulse triggers trigger high-voltage pulses directly from the isolation transformer, without good impedance matching, low coupling efficiency, and low load capacity, especially when multiple sets of capacitors are connected in series with hydrogen thyratrons. In the case of sequential discharge, the anti-interference ability is weak; the rising edge of the output pulse is slow, the amplitude is unstable, and the jitter is large; the filament heating circuit is unreasonable and cannot isolate high-voltage pulses of tens of kV

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