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Showing 1 to 13 of 13 for “"Air Breakdown"”.
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Air breakdown under lightning impulse with plane-plane electrode
Breakdown voltage is a phenomenon where the quantity of an electrical force is required to transform the electrical properties of an object. In other words, breakdown voltage is also called the striking voltage. This breakdown voltage of an insulator is the minimum voltage that can cause some part …
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Lightning impulse tests on air-breakdown level in point-plane electrode configuration
… fundamental characteristics of the electrical breakdown. Breakdown voltage is a phenomenon where the quantity of an electrical force is required to transform the electrical properties of an object. Many factors that lead to the breakdown voltage are still not fully discovered. These factors are …
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Air breakdown characteristics in plane-plane and sphere gap electrode configuration under lightning impulse
This report describes the air breakdown characteristics in plane-plane and sphere gap electrode configuration under lightning impulse. The breakdown in air (spark breakdown) is the transition of a non-sustaining discharge into a self�sustaining discharge. In electrical power system, high voltage …
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Effect of gap lenghts of sphere-sphere electrodes on air breakdown level under lightning impulse
Impinging jets are a best method of achieving particularly high heat transfer coefficient and are therefore employed in many engineering applications. In this study we seek to understand the mechanism of the distributed heat on the curve surface with the goal of identifying preferred methods to …
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Effect of field utilization factor on air breakdown level under impulse lightning in point-sphere electrode system
… the research on the behavior of spark over, breakdown voltage is signified in the electrical engineering designing process. The project is started with an experimental setup to get the standard impulse voltage. This lightning impulse voltage is ensuring to follow the standard of BS EN …
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Ultrafast Broadband Terahertz Spectroscopy
… terahertz generation from a two-color laser air breakdown plasma. This is modeled with a plasma current that includes plasma density and dispersion in propagation. The terahertz spatial profile has a ring-like structure with a frequency dependent radius. Parameters for optimal terahertz …
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Computational modeling and simulation of nonlinear electromagnetic and multiphysics problems
… a uniform time-step size during the simulation. Breakdown phenomena during high-power microwave (HPM) operation are investigated using different physical and mathematical models. During the breakdown process, the bound charges in solid dielectrics and air molecules break free and are pushed to …
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Electropermanent magnetic connectors and actuators : devices and their application in programmable matter
… requirements, humidity sensitivity, and air breakdown. (for electrostatic-drive systems) The electropermanent magnet is a solid-state device whose external magnetic flux can be stably switched on and off by a discrete electrical pulse. Electropermanent magnets can provide low-power …
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Additively Manufacturing High-Performance, Low-Cost Electrospray Ion Sources for Point-of-Care Mass Spectrometry
… electrode designs, reducing corona discharge and air breakdown, enabling operation at ~24% larger bias voltages compared to conventional cylindrical inlets. MS data is presented for ZnONW-coated emitters, detecting therapeutically relevant targets at 1 µg/ml concentrations with a variety of …
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Fundamental and applied aspects of contact electrification
… conditions. The dissipation processes of air breakdown and bulk condution have been studied. The importance of metal work function, dielectric material, the normal force during contact, the mode of contact, and the time of contact has also been investigated. Contact electrification and …
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Microwave Triggered Laser Ionization of Air
… (LIP) have been investigated. The laser-induced breakdown processes in air generated by focusing a 600 mJ, 7 ns pulselength, 1064 nm wavelength Nd:YAG laser onto a 30 μm spot size at an atmospheric pressure of 631 Torr are examined. The breakdown threshold electric field is measured and compared …
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Intense laser matter interactions for explosives detection and tunable spectral blueshift
… level that is 20× lower than that required in air-breakdown plasma. We attribute this blueshift to interaction with a transient free‐electron layer above the metal according to the simulations, distinct from gas‐phase plasma mechanisms. The free electron layer can be thought of as forming a …
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Ultrafast terahertz spectroscopy and control of collective modes in semiconductors
… verified the THz coherent control in air-breakdown plasmas and have demonstrated the ability to induce quantum-interference current control in indium arsenide crystals. As a second focus of this dissertation, we have addressed manipulation of the plasmon modes in condensed matter …