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This paper is intended to report the novel approach in measurement and analysis of electromagnetic interference problem in LASER system. Measurement of radiated magnetic fields around high voltage pulsed LASER source is taken systematically. Magnetic field vectors are measured at regular intervals in 3-D space.3-D magnetic field lines are obtained by interpolation and plotted for visualization. Mathematical...
In a multi-gigawatt pulsed power system like KALI-30 GW, insulation coordination is required to achieve high voltages ranging from 0.3 MV to 1 MV. At the same time optimisation of the insulation parameters is required to minimize the inductance of the system, so that nanoseconds output can be achieved. The KALI-30GW pulse power system utilizes a combination of Perspex, delrin, epoxy, transformer oil,...
A 40kJ, 20kV Electromagnetic Manufacturing (EMM) system [1] has been developed for forming and welding of various metals. The EMM consists of four energy storage capacitor based sub-banks, constant current charging variable dc power supply, single type spark gaps (TSG) switches. Four switches are used, one for each sub-bank. A trigger generator [2, 3] provides four simultaneous trigger pulses for...
This paper is intended to report design methodology and implementation experiments of solid state based triggering arrangement for MARX generator of KALI-5000 (1MV, 40kA, 100nS) pulsed power system. The 15 stage bipolar MARX generator of KALI-5000 system is triggered using three triggered sparkgaps. An IGBT based trigger supply is used to trigger the first spark gap and consecutive two sparkgaps are...
This paper presents the experimental results of a repetitive Marx generator being developed at BARC. Effect of lead inductance, sparkgaps' alignment, charging inductor, ground inductor and shielding has been studied. Two types of configurations have been adopted in order to reduce the erected Marx inductance and results are compared. In this Marx generator plus-minus charging scheme was adopted for...
A pulse power system (1 MV, 5 0kA, and 100 ns) based on dual polarity charged Marx generator and Blumlein pulse forming line (PFL) was built to generate high power microwaves. This paper describes the inherent prepulse present with the Blumlein configuration and the mitigation strategies adopted. Further, a qualitative attempt to verify the generation of high power microwave output on the system is...
Summary form only given. Intense gigawatt relativistic electron beam generation studies were carried out in the presence of prepulse. Electron beams were generated using planar and annular graphite cathodes of various diameters. At 25 mm anode-cathode gap beam parameters obtained are 386 kV, 25 kA, 100 ns. A bipolar prepulse voltage has been recorded at the diode for both the cathodes. Amplitude of...
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