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http://dx.doi.org/10.9766/KIMST.2021.24.2.211

Numerical Simulation on the Formation and Pinching Plasma in X-pinch Wires on 2-D Geometry  

Byun, Sangmin (Department of Energy Systems Engineering, Seoul National University)
Na, Yong-Su (Department of Energy Systems Engineering, Seoul National University)
Chung, Kyoung-Jae (Department of Energy Systems Engineering, Seoul National University)
Kim, Deok-Kyu (The 4th Research and Development Institute, Agency for Defense Development)
Lee, Sangjun (Department of Energy Systems Engineering, Seoul National University)
Lee, Chanyoung (Department of Energy Systems Engineering, Seoul National University)
Ham, Seunggi (Department of Energy Systems Engineering, Seoul National University)
Ryu, Jonghyeon (Department of Energy Systems Engineering, Seoul National University)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.24, no.2, 2021 , pp. 211-218 More about this Journal
Abstract
This paper deals with the computational work to characterize the formation and pinching of a plasma in an X-pinch configuration. A resistive magnetohydrodynamic model of a single fluid and two temperature is adopted assuming a hollow conical structure in the (r,z) domain. The model includes the thermodynamic parameter of tungsten from the corrected Thomas-Fermi EOS(equation of state), determining the average ionization charge, pressure, and internal energy. The transport coefficients, resistivity and thermal conductivity, are obtained by the corrected Lee & More model and a simple radiation loss rate by recombination process is considered in the simulation. The simulation demonstrated the formation of a core-corona plasma and intense compression process near the central region which agrees with the experimental observation in the X-pinch device at Seoul National University. In addition, it confirmed the increase in radiation loss rate with the density and temperature of the core plasma.
Keywords
X-pinch; Magnetohydrodynamics; Exploding Wires;
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