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We perform Particle-In-Cell (PIC) simulation of KALI-30 GW pulsed power generator based rod-pinch diode. It is shown that ions emitted from the anode-plasma play a crucial role in diode dynamics. It is found that ions not only help in compensating the space charge due to electron beam, but also lead to enhancement of the local electric field at the side walls of the cathode leading to additional electron...
A Flash X-ray diode has been designed and developed for generation of single shot, nanosecond duration x-rays from KALI-5000 Pulse Power System (0.8-1 MV, 40 kA, 100 ns). The typical electron beam parameter was 500 kV, 8 kA, 100 ns, with a few hundreds of A/cm current density. The spot size for different diode configurations varied from 4 mm to 2 mm. X-ray radiograph of various metal objects were...
Linear Induction accelerator rated 200kV, 5kA, 100ns and 100Hz repetition rate has been designed and developed in the division. Electron linear induction accelerator belongs to a new class of short pulse, high average power accelerator being developed for various industrial, medical and defense application. The satisfactory performance of all the sub-systems including solid state power modulator,...
Summary form only given. Intense relativistic electron beam generation studies were carried out in a planar diode configuration to investigate the effect of the plasma expansion on the impedance characteristics of the diode. The diode voltage and current waveforms were analyzed with the bipolar space-charge limited flow model. The anode and cathode plasma expansion velocities were calculated using...
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...
Single layer polysilane based organic light- emitting diodes (OLEDs) are fabricated by inserting a thin layer of LiF between the emissive poly(n-butylphenylsilane) (PS-4) layer and Al cathode. It was found that the current in the devices is significantly enhanced as compared to devices with Ca/Al electrode. The enhancement may be caused by the increased electron injection due to the tunneling through...
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