Abstract
Introduction. Inductive energy storage with a plasma opening switch is an important electrical device that provides fast interruption of high currents with subsequent induction of high voltage. These devices are widely used in accelerator technology to produce high-current electron beams. Problem. To increase the voltage multiplication factor on a small-sized direct-action electron accelerator, it is necessary to increase the efficiency of inductive energy storage with a plasma opening switch. For this purpose, the installation was modernized by updating the electrical equipment, which led to the need to determine new output characteristics of inductive energy storage with a plasma opening switch: the rate of change of current and its amplitude during opening and thus increasing the voltage multiplication factor. The opening process depends on many electrical parameters of the installation, which requires determining their influence on its dynamics. Goal. To increase the efficiency of inductive energy storage with a plasma opening switch by increasing the speed of its opening by changing the electrophysical parameters of the DIN-2K accelerator. Methodology. A method for determining the induced voltage from experimental current waveforms is proposed. The method is confirmed by the results of measurements with a capacitive voltage divider with an error of less than 20 %. Results. The opening speed of inductive energy storage with a plasma opening switch has been increased by 80 % by expanding the operating voltage range and the conditions for reliable opening have been determined. Scientific novelty. For the first time, the conditions for reliable opening of inductive energy storage with a plasma opening switch have been determined. For the first time, the influence of electrophysical parameters of the accelerator, which contribute to an increase in the opening speed and, as a result, an increase in the voltage multiplication factor, has been determined. For the first time, the necessary threshold values of the opening speed have been determined, which allowed to ensure reliable formation of explosive electron emission. Practical value. A method for determining the induced voltage is proposed by experimentally establishing the change in current during opening of inductive energy storage with a plasma opening switch and the inductance of the discharge circuit, which made it possible to free the chamber volume from the capacitive voltage divider and to implement the unhindered flow of the entire sequence of physical processes. Practical recommendations are proposed on how to increase the rate of current change during the opening of inductive energy storage with a plasma opening switch by changing the electrical parameters of the accelerator discharge circuits: discharge voltage, inductance, and number of plasma guns. References 48, figures 13.