Abstract
The work presents experimental study results of gas discharge interrupter with a sector hole in the screen and a circular grid hole being asymmetrically placed regarding central axis as part of a high-voltage pulse generator with inductive energy storage. According to the results received the device under consideration managed to decrease minimum turn-off time by 6 times up to 30 ns compared to a switch with inverse hole pattern in a grid node. Limiting pulse voltage amplitude is fixed at the level of 50 kV, peak pulse power increase up to 13 MW is achieved.
Highlights
According to physical principles of energy storage high voltage nanosecond pulse generators are subdivided into several groups, viz. mechanical storage practically being out of use nowadays due to their low efficiency, capacitive energy storage (CES) representing the system of capacitors connected in series or parallel with high stored specific energy of electric field and inductive energy storage (IES) usually made as solenoids with dielectric frame storing the energy of magnetic field
A given work presents the results received from the research of thyratron type gas discharge device with sector hole in the screen and circular grid hole being asymmetrically placed regarding central axis, the comparison with the characteristics received earlier from the switch with inverse hole placement in a grid node is given
The results received after the simulation of electric field distribution in a new gas discharge interrupter show the depth of anode field penetration into cathode region being equal to 4.5 mm (Figure 3), them being correspondent with the previously received data in a device with inverse hole placement in a grid node having proved sufficient electric strength to be used in a high-voltage pulse generator
Summary
Current stage in the development of high voltage pulse technologies can be characterised as the stage of combining modern electronic component base with new materials and traditional approaches used when developing and designing high voltage pulse generators. A given method is realised in the conditions of developing nonequilibrium state of gas discharge low pressure plasma in a gap with variable cross-section (gas discharge device grid node) under the influence of electric field strength on gas discharge gap. This state causes the process of neutral atom displacement from constricted discharge. The second stage features the research of current cut-off phenomenon in new gas discharge interrupters to determine main operating characteristics of the devices as well as the influence of grid node design on the process of current break. A given work presents the results received from the research of thyratron type gas discharge device with sector hole in the screen and circular grid hole being asymmetrically placed regarding central axis, the comparison with the characteristics received earlier from the switch with inverse hole placement in a grid node is given
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