Verification of a Computational Model of Plasma-Current Sheath Motion in Plasma Focus Chambers
https://doi.org/10.56304/S2304487X22030129
Abstract
The mathematical modeling of plasma-current sheath (PCS) motion in plasma focus chambers has been verified with the two-dimensional magnetohydrodynamic (MHD) code for plasma focus calculating. The operation of pulsed neutron generators based on plasma focus chambers is described. The basic MHD equations describing the behavior of a fully ionized plasma, underlying the MHD code, are also given. In the MHD code, plasma-current sheath motion is simulated in the framework of ideal one-fluid two-dimensional magnetohydrodynamics under the assumption of axisymmetric discharge development. The MHD code has been verified by comparing the calculation results with experimental data for plasma focus chambers ПФ7-02, Т19-Л316 and ПФ7-02М1 manufactured at VNIIA. The calculated values of the discharge current amplitude, the time to reach the current maximum, and the singularity time (pinching time) are compared with the respective experimental data. The program interface is shown. The experimental and calculated dependences of the discharge current amplitude on the charging voltage for the Т19-Л316 chamber are shown in the voltage range from 17 to 23 kV and currents from 150 to 200 kA. It has been concluded that this program is promising for the development of generators based on plasma-focus chambers.
About the Authors
D. I. Yurkov
Duknov All-Russia Research Institute of Automatics (VNIIA); National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
Russian Federation
Russian Federation
Moscow
127030
115409
V. A. Lavrenin
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
Russian Federation
Russian Federation
Moscow
115409
B. D. Lemeshko
Duknov All-Russia Research Institute of Automatics (VNIIA); National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
Russian Federation
Russian Federation
Moscow
127030
115409
A. N. Selifanov
Duknov All-Russia Research Institute of Automatics (VNIIA)
Russian Federation
Russian Federation
Moscow
127030
A. K. Dulatov
Duknov All-Russia Research Institute of Automatics (VNIIA)
Russian Federation
Russian Federation
Moscow
127030
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Review
For citations:
Yurkov D.I., Lavrenin V.A., Lemeshko B.D., Selifanov A.N., Dulatov A.K. Verification of a Computational Model of Plasma-Current Sheath Motion in Plasma Focus Chambers. Vestnik natsional'nogo issledovatel'skogo yadernogo universiteta "MIFI". 2022;11(3):260–265. (In Russ.) https://doi.org/10.56304/S2304487X22030129
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