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Two insulator bracing type MV gas switches are developed. One switch's HV electrode is cantilever and the insulator envelope is integrated. The other's HV electrode is out of insulator envelope and the brace cylinder is sectioned. Through self breakdown experiments and electrostatic field simulations, the optimum design of insulator envelopes is discussed and the reason for puncturing on the envelope...
Now that the refurbishment of the Z machine at Sandia is complete we are routinely operating with currents over 26 MA into various loads. With routine operation we are able to measure current and voltage throughout the machine and compare with circuit code predictions. These measurements have motivated improvements to the original model to include two-dimensional (2D) and three-dimensional (3D) sub-circuits...
This paper describes the structures of the ±100kV multi gap multi channel gas switch. The self breakdown performance of ten switches is introduced. A test bed for synchronous discharge is established. Ten switches are arranged in parallel, and then the synchronous discharge is carried out. The cases with different switching coefficients are analyzed. Two types of trigger isolating water resistors...
In this paper is designed a novel all solid pulsed power system of high repetition rates, long pulse, high reliability, long life, and compact. This system is composed of BOOST circuit, LC circuit, pulsed transformer, magnetic compression circuit, and strip line. The theoretical analysis and simulation of the BOOST circuit and magnetic compression circuit are given. The optimization of the system...
One of the most widely applied devices for repetitive pulse power generator is high-coupling Tesla transformer. The general designing of the high-coupling Tesla transformer is described in this paper. Because of the requirement of high coupling for Tesla transformer, an open-loop magnetic core is employed. In order to reach high reliability of this high-voltage generator, the windings of Tesla transformer...
In order to study the physics of fast Z-pinches and research the key issues of pulse power technology, a 10MA/6MV z-pinch primary test stand (PTS) composed of 24 modules will be built in IFP. The prototype module adopted capacitive storage scheme has been built and tested. It is composed of the 6MV/300kJ Marx-generator (MG), intermediate storage capacitor (IC), laser-triggered switch (LTS), pulse...
A magnetic pulse compression system is presented which does not contain external remagnetization circuits that are commonly used in magnetic compressors. A one stage compressor suffices to form 20kV, ∼70ns pulses across a 207Ω resistive load. Equivalent circuits for two consecutive operation stages of the compressor accounting for nonlinear processes in magnetic switches are described and analyzed...
The design and construction of STARFISH, a series of compact compact pulsed power generators to drive advanced z-pinch experiments, for applications such soft X-ray generation and as a high density plasma diagnostic, is being developed in Oxford. The design for these machines is based on the use of many very low impedance distributed pulse forming lines (PFLs) or discrete pulse forming networks (PFNs),...
A linear induction accelerator (LIA) cell includes the pulse power system, the cavity and the reset system. A double-pulse cavity needs double magnetic cores contrast to a single-pulse one, so more power is required to restore those cores before the exciting pulses come. Analysis and experiments have been done to prove that, by the method of cable delay, Marx + Blumlein Pulse Forming Line (PFL) pulse...
The gas switches can be used to produce high power electromagnetic pulses with very fast risetime in the pulsed power systems such as UWB radiate systems, particles accelerators, laser drivers and so on. The hydrogen gas switches have promised in repetitive rate application for its fastest recovery feature. Experimental study on high pressure hydrogen switches is taken under pressure of 4∼13MPa and...
The characteristics of laser-induced breakdown in nitrogen at a wavelength of 1064nm were investigated with a 10-ns pulsed laser generator. The threshold field of nitrogen decreases as the pressure increases, and the experimental threshold intensities at the lower pressure were in good agreement with experimental values measured by Striker and Parker in 1982. The delay and jitter decreases while increasing...
High-energy switch and trigger systems are required for a range of capacitor bank applications such as for electromagnetic rail, coil, and electro-thermal guns. This paper summarizes recent developments in this kind of switch design in our laboratory. The switch is a two-electrode switch and is triggered by an overvolting “series-injection” of a high-voltage pulse,elimination of the trigger electrode,...
A set of high-voltage pulse generators is described. They are used for generation of gigawatt microwave radiation pulses in vircator or relativistic BWO with ∼50 Ohm diode impedance. The first two generators are based on inductive energy storage and an exploding wires switch. The output voltage and the power of the first generator are ∼600 kV and 10 GW, respectively. The second generator provides...
A high power pulse device, primary test stand (PTS), is under-developed at the Institute of Fluid Physics, CAEP. In order to study the key techniques, the prototype module was built firstly. The prototype module contains Marx generator, intermediate store capacitor, laser triggered gas switch, water pulse forming line, water self-breaking switch, water transmission line and water resistance load....
The regularities of current closing and tearing in the microsecond megaampere plasma opening switches are considered. It is outlined the switch conduction current scaling which is determined by the plasma acceleration by the magnetic piston, and its comparison with the experimental results. It is considered the current channel structure formation which is determined by diffusion and convective magnetic...
The paper considers the design of the sectionalized explosive current opening switch which allows increasing the power of the current pulse in the load. The results of testing of the sectionalized opening switch operation on plane models are presented. The results of the experiment with the pulsed source of current on the basis of HEMG and 10-section cylindrical current opening switch are described.
This paper introduces a design of high voltage pulse power supply that uses storage battery as prime power resource. This high voltage pulse power supply system can work without alternating current power supply and can be controlled by the remote control centre. Besides, some important information can be gained and displayed on the computer, such as the position, status, measured feedback of output...
A trigger device of pulsed power facility is introduced in this paper. The trigger device is composed of Marx generate, power supply, trigger, and et al. The principle of Marx generate (in the paper) is outlined. Equivalent circuit of charging is analyzed, and the waves of charging voltage and current are respectively simulated. Then equivalent circuit of discharging is analyzed, and the wave of output...
A compact ten stage Marx with six parallel 40kV/5600pF capacitors per stage, developed for various pulsed power applications, is described. Every two stages have a common unattached gas switch so there are five switches that of two are trigger switch and three are self-breakdown switch. The spark gaps and capacitors are arranged radially at sixty degree intervals. Unique features of the Compact Marx...
Experiment of obtaining HPM pulse using Multi resonant cavities pulse compress setup is presented. The pulse compression system works at S band and the resonance frequency is 2.85 GHz. With a 10MW and 2.0 µs input pulse, the system can generate two pulses each with more then 100 MW pulse power and 10ns pulse duration, the energy efficiency has a range of 10%∼30%, and the average energy efficiency...
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