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Simulation of Plasma Focus Devices with Hemisphere Electrodes

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Abstract

A magneto-hydrodynamic simulation of a plasma focus device with hemisphere electrodes is constructed. The snowplow model is used with help of the momentum conservation equation to describe the motion of the plasma sheath between the two concentric hemispheres. The model simulates various plasma parameters like plasma temperature and plasma sheath velocity. The circuit equation is used to calculate the discharge current and electrodes voltage across the two hemisphere terminals. A comparison between the cylindrical and spherical devices is built. The results show that the current dip and the spike voltage is expected to be much pronounced in the spherical devices. It is found also that the plasma sheath velocity and temperature in the case of the cylindrical system are higher than that in the spherical one.

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Acknowledgments

The author would like to thank Prof. Dr. M. M. Masoud (Plasma Physics Department, Atomic Energy Authority AEA, Egypt) and Prof. Dr. M. Bourham (Nuclear Engineering Department, NCSU, USA) for their kind support and useful discussions.

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Authors and Affiliations

  1. Faculty of Science, Physics Department, Benha University, Benha, Egypt

    M. A. Abd Al-Halim

  2. Department of Nuclear Engineering, North Carolina State University, Raleigh, NC, 27695-7909, USA

    M. A. Abd Al-Halim

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  1. M. A. Abd Al-Halim
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Correspondence to M. A. Abd Al-Halim.

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Abd Al-Halim, M.A. Simulation of Plasma Focus Devices with Hemisphere Electrodes. J Fusion Energ 29, 134–140 (2010). https://doi.org/10.1007/s10894-009-9245-7

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