Multilevel series LTD driving source and synchronous trigger method thereof

Abstract

The invention provides a multilevel series LTD driving source and a synchronous trigger method of the multilevel series LTD driving source. An external trigger pulse is introduced into each of front n level modules of an LTD pulse source, synchronous trigger of other branch switches of n level modules is achieved by means of a branch circuit and an angular orientation transmission line in each module, meanwhile, a trigger pulse is introduced from each trigger branch circuit high voltage terminal of the n level modules, the trigger pulses are sequentially introduced into trigger pulse input ends of follow-up series modules at corresponding positions to trigger switches of trigger branch circuits in the follow-up modules, the remaining series modules are carried out according to the previous steps, and all the series modules of an LTD are synchronously triggered. The requirement of the multilevel series LTD pulse source for a trigger system and a trigger timing sequence can be obviously simplified, and module trigger reliability is improved.

Description

technical field [0001] The present invention provides a novel module structure and a trigger method for a linear transformer driver (Linear Transformer Driver, LTD for short) using a water medium as a multi-stage series secondary. Applications in other fields are of great value. Background technique [0002] The LTD pulse source is connected in parallel through multiple low-inductance branches uniformly arranged in the radial direction, and uses electromagnetic coupling to realize the current superposition of multiple branches in a single stage and the voltage superposition of multi-stage series modules, and can directly obtain high-power pulses of 70-200ns at the leading edge , which has important applications in Z-pinch inertial confinement fusion (ICF) / fusion energy (IFE), flash photography, strong laser and other fields. To realize Z-pinch ICF / IFE, dozens to hundreds of LTDs with an output voltage of several megavolts are required to be connected in parallel, and each L...

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Problems solved by technology

The main problem in this idea is that the delay time of the gas switch from applying the trigger pulse to closing is not considered, and the voltage pulse generated by the magnetic ring and the secondary winding is closely related to the magnetization characteristics of the magnetic core and the secondary impedance. When the impedance is matched, the voltage The leading edge of the pulse is about 100ns. Therefore, it is too late to trigger the subsequent module with the induced voltage pulse of the auxiliary winding of the magnetic core of the module, because the secondary electric pulse has already been transmitted, but the switch has not been closed, and the leading edge of the electric pulse induced by the auxiliary winding is too slow (approximately 100ns)

Therefore, the idea is practically unfeasible

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