Journal of Nuclear Science, Engineering and Technology (JONSAT)
In cooperation with the Iranian Nuclear Society

Study of the Current Sheath Velocity in a 2.2 kJ Plasma Focus Device

Document Type : Research Paper

Authors

M. A Tafreshi
D Rostamifard
A Nasiri

Plasma and Nuclear Fusion Research School, Nuclear Science and Technology Research Institute, AEOI

https://doi.org/10.24200/nst.2018.190
Abstract
In this article, after a brief introduction of MTPF-1 plasma focus device, some of the related  experimental data are presented. These data show that it is possible to select the proper gas pressure and discharge voltage in order to have a specified pinch time interval. In addition, the effects of gas pressure and discharge voltage on the current sheath’s mean velocity have also been studied. This study showed that, in the case of argon, the maximum value of the current sheath’s mean velocity is about 5 cm/µs, where it can be obtained under various combinations of the pressures and discharge voltages. By using the speed factor concept, the velocity of the current sheath at the pinch time was also examined. It was determined that in two separate experiments with different gas pressures and discharge voltages, the equality of the pinch times means the approximate equality of the current sheath radial velocities.

Highlights

[1] M. Barbaglia, H. Bruzzone, H. Acuna, L. Soto, A. Clausse, Experimental study of the hard X-ray emissions in a plasma focus of hundreds of Joules, Plasma Phys. Control. Fusion, 51(4) (2009(  045001-9.

 [2] N.V. Filippov, T.I. Filippova, M.A. Karakin, V.I. Krauz, V.P. Tykshaev, V.P. Vinogradov, Y.P. Bakulin, V.V. Timofeev, V.F. Zinchenko, J.R. Brzosko, J.S. Brzosko, Filippov type plasma focus as intense source of hard X-rays (Ex~50 keV), IEEE Trans. on Plasma Science, 24(4( (1996) 1215-1222.

 [3] W. Surata, M.J. Sadowski, M. Paduch, E. Zielinska, K. Tomaszewski, Recent measur-ements of soft X-ray emission from the DPF-1000U facility, Nukleonika, 60(2) (2015) 303-308.

 [4] V.A. Gribkov, A. Banaszak, B. Bienkowska, A.V. Dubrovsky, I. Ivanova-Stanik, L. Jakubowski, L. Karpinski, R.A. Miklaszewski, M. Paduch, M.J. Sadowski, M. Scholz, A. Szydlowski, K. Tomaszewski, Plasma dynamics in the PF-1000 device under full-scale energy storage: II. Fast electron and ion characteristics versus neutron emission parameters and gun optimization perspectives, J. Phys. D: Appl. Phys., 40(12) (2007) 3592-3607.

 [5] N.V. Filippov, T.I. Filippova, V.P. Vinogradov, Dense, high-temperature plasma in a noncylindrical z-pinch compression, Nucl. Fusion, Suppl, 2 (1962) 577.

 [6] J.W. Mather, Formation of a high-density deuterium plasma focus, Physics of Fluids, 8(2) (1965) 366-377.

 [7] L. Soto, New trends and future perspectives on plasma focus research, Plasma Phys. Control. Fusion, 47(5A) (2005) 361-381.

 [8] Sh. Zeb, A. Qayyum, M. Sadiq, M. Shafiq, A. Waheed, M. Zakaullah, Deposition of diamond-like carbon films using graphite sputtering in neon dense plasma, Plasma Chemistry and Plasma Processing, 27(2) (2007) 127-139.

 

[9] V.I. Krauz, M.G. Levashova, M.A. Karakin, O.N. Krokhin, V.S. Lisitsa, A.N. Mokeev, V.V. Myalton, V.Ya Nikulin, A.V. Oginov, V.P. Smirnov, V.E. Fortov, Influence of the radiation of the plasma focus-current sheath on the implosion dynamics of condensed targets, Plasma Physics Reports, 34(1) (2008) 43-51.

 [10] V. Raspa, L. Sigaut, R. Llovera, P. Cobelli, B. Knoblauch, R. Vieytes, A. Clausse, C. Moreno, Plasma focus as a powerful hard X-ray source for ultrafast imaging of moving metallic objects, Brazilian Journal of Physics, 34(4B) (2004) 1696-1699.

 [11] M.A. Tafreshi, M.M. Nasseri, N. Nabipour, D. Rostamifard, A. Nasiri, Application of plasma focus device in fast industrial radiography, J. Fusion Energy, 33(6) (2014) 689-692.

 [12] S. Lee, Plasma focus radiative model: review of the Lee model code, J. Fusion Energy, 33(4) (2014) 319-335.

 [13] V. Siahpoush, M.A. Tafreshi, S. Sobhanian, S. Khorram, Adaptation of Sing Lee’s model to the Filippov type plasma focus geometry, Plasma Phys. Control. Fusion, 47(7) (2005) 1065-1075.

 [14] M.A. Abd Al-Halim, Simulation of plasma focus devices with hemisphere electrodes, J. Fusion Energy, 29(2) (2010) 134-140.

 [15] M.M. Milanese, J.J. Niedbalski, R.L. Moroso, Filaments in the sheath evolution of the dense plasma focus as applied to intense auroral observations, IEEE Trans. Plasma Sci., 35(4) (2007) 808-812.

 [16] S.M. Hassan, E.L. Clark, C. Petridis, G.C. Androulakis, J. Chatzakis, P. Lee, N.A. Papadogiannis, M. Tatarakis, Filamentary structure of current sheath in miniature plasma focus, IEEE Trans. Plasma Sci., 39(11) (2011) 2432-2433.

 [17] A.E. Abdou, M.I. Ismail, A.E. Mohamed, S. Lee, S.H. Saw, R. Verma, Preliminary results of Kansas State University dense plasma focus, IEEE Trans. on Plasma Science, 40(10) (2012) 2741-2744.

 [18] S.H. Saw, S. Lee, F. Roy, P.L. Chong, V. Vengadeswaran, A.S.M. Sidik, Y.W. Leong, A. Singh, In situ determination of the static inductance and resistance of a plasma focus capacitor bank, Rev. Sci. Instrum., 81(5) (2010) 053505-1-053505-4.

 [19] H. Krompholz, F. Ruhl, W. Schneider, K. Schonbach, G. Herziger, A scaling law for plasma focus devices, Physics Letters A, 82(2) 82-84.

 [20] S. Lee, A. Serban, Dimensions and lifetime of the plasma focus pinch, IEEE Trans. on Plasma Science, 24(3) (1996) 1101-1105.

Keywords

Plasma focus
Pinch time
Current Sheath
Speed factor
[1] M. Barbaglia, H. Bruzzone, H. Acuna, L. Soto, A. Clausse, Experimental study of the hard X-ray emissions in a plasma focus of hundreds of Joules, Plasma Phys. Control. Fusion, 51(4) (2009(  045001-9.
 [2] N.V. Filippov, T.I. Filippova, M.A. Karakin, V.I. Krauz, V.P. Tykshaev, V.P. Vinogradov, Y.P. Bakulin, V.V. Timofeev, V.F. Zinchenko, J.R. Brzosko, J.S. Brzosko, Filippov type plasma focus as intense source of hard X-rays (Ex~50 keV), IEEE Trans. on Plasma Science, 24(4( (1996) 1215-1222.
 [3] W. Surata, M.J. Sadowski, M. Paduch, E. Zielinska, K. Tomaszewski, Recent measur-ements of soft X-ray emission from the DPF-1000U facility, Nukleonika, 60(2) (2015) 303-308.
 [4] V.A. Gribkov, A. Banaszak, B. Bienkowska, A.V. Dubrovsky, I. Ivanova-Stanik, L. Jakubowski, L. Karpinski, R.A. Miklaszewski, M. Paduch, M.J. Sadowski, M. Scholz, A. Szydlowski, K. Tomaszewski, Plasma dynamics in the PF-1000 device under full-scale energy storage: II. Fast electron and ion characteristics versus neutron emission parameters and gun optimization perspectives, J. Phys. D: Appl. Phys., 40(12) (2007) 3592-3607.
 [5] N.V. Filippov, T.I. Filippova, V.P. Vinogradov, Dense, high-temperature plasma in a noncylindrical z-pinch compression, Nucl. Fusion, Suppl, 2 (1962) 577.
 [6] J.W. Mather, Formation of a high-density deuterium plasma focus, Physics of Fluids, 8(2) (1965) 366-377.
 [7] L. Soto, New trends and future perspectives on plasma focus research, Plasma Phys. Control. Fusion, 47(5A) (2005) 361-381.
 [8] Sh. Zeb, A. Qayyum, M. Sadiq, M. Shafiq, A. Waheed, M. Zakaullah, Deposition of diamond-like carbon films using graphite sputtering in neon dense plasma, Plasma Chemistry and Plasma Processing, 27(2) (2007) 127-139.
 
[9] V.I. Krauz, M.G. Levashova, M.A. Karakin, O.N. Krokhin, V.S. Lisitsa, A.N. Mokeev, V.V. Myalton, V.Ya Nikulin, A.V. Oginov, V.P. Smirnov, V.E. Fortov, Influence of the radiation of the plasma focus-current sheath on the implosion dynamics of condensed targets, Plasma Physics Reports, 34(1) (2008) 43-51.
 [10] V. Raspa, L. Sigaut, R. Llovera, P. Cobelli, B. Knoblauch, R. Vieytes, A. Clausse, C. Moreno, Plasma focus as a powerful hard X-ray source for ultrafast imaging of moving metallic objects, Brazilian Journal of Physics, 34(4B) (2004) 1696-1699.
 [11] M.A. Tafreshi, M.M. Nasseri, N. Nabipour, D. Rostamifard, A. Nasiri, Application of plasma focus device in fast industrial radiography, J. Fusion Energy, 33(6) (2014) 689-692.
 [12] S. Lee, Plasma focus radiative model: review of the Lee model code, J. Fusion Energy, 33(4) (2014) 319-335.
 [13] V. Siahpoush, M.A. Tafreshi, S. Sobhanian, S. Khorram, Adaptation of Sing Lee’s model to the Filippov type plasma focus geometry, Plasma Phys. Control. Fusion, 47(7) (2005) 1065-1075.
 [14] M.A. Abd Al-Halim, Simulation of plasma focus devices with hemisphere electrodes, J. Fusion Energy, 29(2) (2010) 134-140.
 [15] M.M. Milanese, J.J. Niedbalski, R.L. Moroso, Filaments in the sheath evolution of the dense plasma focus as applied to intense auroral observations, IEEE Trans. Plasma Sci., 35(4) (2007) 808-812.
 [16] S.M. Hassan, E.L. Clark, C. Petridis, G.C. Androulakis, J. Chatzakis, P. Lee, N.A. Papadogiannis, M. Tatarakis, Filamentary structure of current sheath in miniature plasma focus, IEEE Trans. Plasma Sci., 39(11) (2011) 2432-2433.
 [17] A.E. Abdou, M.I. Ismail, A.E. Mohamed, S. Lee, S.H. Saw, R. Verma, Preliminary results of Kansas State University dense plasma focus, IEEE Trans. on Plasma Science, 40(10) (2012) 2741-2744.
 [18] S.H. Saw, S. Lee, F. Roy, P.L. Chong, V. Vengadeswaran, A.S.M. Sidik, Y.W. Leong, A. Singh, In situ determination of the static inductance and resistance of a plasma focus capacitor bank, Rev. Sci. Instrum., 81(5) (2010) 053505-1-053505-4.
 [19] H. Krompholz, F. Ruhl, W. Schneider, K. Schonbach, G. Herziger, A scaling law for plasma focus devices, Physics Letters A, 82(2) 82-84.
 [20] S. Lee, A. Serban, Dimensions and lifetime of the plasma focus pinch, IEEE Trans. on Plasma Science, 24(3) (1996) 1101-1105.

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