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Modeling of the effect of penetration channel shape on plasma parameters when dealing with high concentration energy

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Document pages: 8 pages

Abstract: In our work to formulate scientific reasons for the process control method when processing materials with concentrated energy, we have developed a model to calculate the plasma parameters and the secondary waveform of non self sustained discharge current in the plasma as a function of the penetration channel geometry, thermal field and beam position in the penetration channel. We propose this method and a numerical implementation. The first stage involves using a two-dimensional model to calculate the statistical probability of secondary electrons passing through the channel as a function of the depth of the interaction region. Then, the found relationship is used to numerically calculate how the secondary current changess a distributed beam moves along a three-dimensional penetration channel. We demonstrate that during oscillating electron beam welding the waveform has the greatest magnitude during interaction with the upper areas of the penetration channel and diminishes with increasing penetration channel depth in a way that depends on the penetration channel’s shape. When the surface of the penetration channel is approximated with a Gaussian function, the waveform decreases nearly exponentially.

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