LTD module and synchronous trigger method thereof

Abstract

The invention provides an LTD module with a novel structure and a trigger method of the LTD module. Only one path of trigger pulses needs to be led in the module of each level of an LTD, and a branch arranged inside the LTD module and an angular transmission line arranged on an insulator in the middle of the LTD module are used for achieving synchronous triggering of switches of the other branches of the LTD module. The trigger mode of the LTD module is not limited by the factors of the secondary coupling overvoltage trigger mode, wherein the factors comprise the factor of the coupling time response characteristic of a magnetic core in ultrafast leading-edge pulses, the factor that whether the breakdown closing time of the branch switches under the condition of direct-current superposition secondary coupling voltage is smaller than the transmission time of an electric pulse on the secondary grade of the LTD, and the factor that whether insulation of an induction cavity can meet the requirements, and the LTD module and the trigger method of the LTD module have better technical feasibility.

Description

technical field [0001] The present invention provides a new structure and a corresponding trigger method for a linear transformer driver (Linear Transformer Driver, LTD for short). The angular transmission line realizes the synchronous triggering of other branch switches in the module. This triggering method is of great value in promoting the application of LTD in the fields of Z-pinch inertial confinement fusion / fusion energy and high-energy pulsed X-ray flash photography. Background technique [0002] LTD uses multiple low-inductance branches arranged uniformly in the radial direction in parallel, 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. Z-pinch inertial confinement fusion (ICF) / fusion energy (IFE), flash photography, strong laser and other fields have important applicat...

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Problems solved by technology

Both at home and abroad are actively exploring and researching the new trigger circuit topology and trigger mode of the LTD-type drive source, such as the literature (F.J.Zutavern, S.F.Glover, K.W.Reed, et al.PCSS triggered pulsed power switches[C] / / 16th IEEE Int Pulsed Power Conf.2007:231-235.) studied the feasibility of the photoconductive switch triggering the LTD gas switch. Due to the limitation of the operating voltage and flow capacity of the photoconductive switch, it cannot be used as an LTD branch switch, but can only be used as the pre-stage of the LTD trigger system Trigger switch; literature (Yin Jiahui, Wei Hao, Sun Fengju, etc. Synchronous trigger system driven by fast pulse linear transformer[J]. Strong Laser and Particle Beam, 2012,24(4):871-875.(Yin Jiahui,Wei Hao, Sun Fengju, et al. Experimental research of high-power spark gap switch. High Power Laser and Particle Beams, 2012, 24(4): 871-875; Lei Yu, Qiu Jian, Liu Kefu. Synchronous triggering of linear transformer drive source multi-channel switch Technology [J]. High Power Laser and Particle Beam, 2012,24(4):765-770.(Lei yu, Qiu Jian, Liu kefu, et al.Multi-output synchronization trigger for linear transformer driver.High Power Laser and Particle Beams, 2012, 24 (4): 765-770) discussed the topology of the multi-stage series LTD trigger circuit and the generation of multi-channel fast leading edge and voltage 140kV trigger pulses, but each 1MA LTD module still needs to apply 4 channels For a trigger pulse with a fast leading edge amplitude of 140kV, the topology of the trigger circuit and the trigger pulse generation system are still huge and complex

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