High Efficiency Compact High Voltage Vector Inversion Generators
Vector Inversion Generators, VIG, were invented by Fitch and Howell1. The spiral-line VIG takes electrostatically stored energy and converts it into a fast rising high voltage pulse in a dynamic two component, one-step process. We present the results for a variety of units operating over a wide range of parameters. The highest voltage achieved in a single ultra-compact unit has been 500 kV in a device that is 8 inches long and 5 inches in diameter. Two of these units have been operated in tandem to produce a 1 MV pulse generator that failed after about 10 cycles. Finally, we discuss the range of loads that can be driven by this dynamic device in terms of the VIG dynamics and the RC time constant for the load.
Trigger generator for spark gap switching synchronisation
A two electrode Trigatron spark gap switch is used as the main discharge switch and triggered by a reliable trigger generator. In this article, a novel synchronization of four parallel spark gap switches with an accuracy of 5–10 ns for high-frequency pulsed power application is discussed. The circuit uses a combination of one master spark gap and set of inductor and capacitors to generate a fast trigger pulse to synchronize four spark gaps and can be controlled via an IGBT switch. Two trigger generator circuits are discussed, based on pulse shaping network and pulse transformer; comprises a parallel combination of capacitor and inductor. A spark gap switch in triggered mode and the self-triggered mode is used to switch the energy from capacitive source to inductive load. Results show nanosecond level of accuracy in synchronization is reported in this paper along with simulations and analysis.
Portable flash x-ray inspector
A portable flash x-ray inspector have been developed. This inspector mainly consists of three parts, they are spiral strip line high voltage generator, cold cathode x-ray tube and power supply, control and count circuits. This instrument has wide applications. It can also be used to equip cars for field in site to study ballistics, if through some improvement.