Intense giga watt pulsed electron accelerators for HPM and FXR generation

New development in the field of high power pulsed accelerator is the KALI-30GW system capable of delivering 1 MV, 30 kA, 80 ns electron beam pulses. This system has all indigenous components including energy storage capacitors and transformer oil as the dielectric and insulating medium. The energy balance in each stage of sub-system has been maintained to have better efficiency of energy transfer and improving the life of associated insulators. It has been used for high power microwaves generation using reflex triode and relativistic magnetron successfully. A suitable flash-X-rays gun is also designed and developed for this system. The results of these experiments will be presented in this paper. In order to make pulsed electron accelerators compact and repetitive, two more systems are developed in Accelerator and Pulse Power Division, BTDG, BARC which are Linear Induction Accelerator (LIA-400) tested up to 400 kV, 4 kA,100 ns,1-300 Hz and repetitive Marx generator rated for 300 kV, 12 kA, 300 ns, 10 Hz are also developed which are being used for Intentional ElectroMagnetic Interference (IEMI) studies of various electronics circuitry/devices. A few experimental investigations are also done using these systems to understand the effect of cathode material, relativistic electron beam and flash-X-rays emission. Latest results are being illustrated. (author)