Deuterium gas puff Z-pinch at currents of 2 to 3 mega-ampere

D. Klir, A. V. Shishlov, P. Kubes, K. Rezac, F. I. Fursov, V. A. Kokshenev, B. M. Kovalchuk, J. Kravarik, N. E. Kurmaev, A. Yu Labetsky, N. A. Ratakhin

Результат исследований: Материалы для журналаСтатья

18 Цитирования (Scopus)

Выдержка

Deuterium gas-puff experiments have been carried out on the GIT-12 generator at the Institute of High Current Electronics in Tomsk. The emphasis was put on the study of plasma dynamics and neutron production in double shell gas puffs. A linear mass density of deuterium (D 2) varied between 50 and 85 g/cm. Somewhat problematic was a spread of the D 2 gas at a large diameter in the central anode-cathode region. The generator operated in two regimes, with and without a plasma opening switch (POS). When the POS was used, a current reached a peak of 2.7 MA with a 200 ns rise time. Without the POS, a current rise time approached 1500 ns. The influence of different current rise times on neutron production was researched. Obtained results were important for comparison of fast deuterium Z-pinches with plasma foci. Average DD neutron yields with and without the POS were about 10 11. The neutron yield seems to be dependent on a peak voltage at the Z-pinch load. In all shots, the neutron emission started during stagnation. At the beginning of the neutron production, the neutron emission correlated with soft x-rays and a significant fraction of neutrons could be explained by the thermonuclear mechanism. Nevertheless, a peak of the neutron emission occurred 40 ns after a soft x-ray peak. At this very moment, hard x-rays above 1 MeV were detected and a rapid expansion with a velocity of 3 10 5 m/s was observed. In the case of the POS, 1 MeV widths of radial neutron spectra implied that there are deuterons with the energy above 200 keV moving in the radial direction. On the basis of D 2 gas puff experiments in the 0.3-17 MA region, the neutron yield dependence on a current as Y I 3. 0 0. 2 was proposed.

Язык оригиналаАнглийский
Номер статьи032706
ЖурналPhysics of Plasmas
Том19
Номер выпуска3
DOI
СостояниеОпубликовано - 1 мар 2012

Отпечаток

deuterium
neutrons
switches
neutron emission
gases
generators
plasma dynamics
plasma focus
x rays
neutron spectra
shot
deuterons
high current
anodes
cathodes
moments
expansion
electric potential
electronics

ASJC Scopus subject areas

  • Condensed Matter Physics

Цитировать

Deuterium gas puff Z-pinch at currents of 2 to 3 mega-ampere. / Klir, D.; Shishlov, A. V.; Kubes, P.; Rezac, K.; Fursov, F. I.; Kokshenev, V. A.; Kovalchuk, B. M.; Kravarik, J.; Kurmaev, N. E.; Labetsky, A. Yu; Ratakhin, N. A.

В: Physics of Plasmas, Том 19, № 3, 032706, 01.03.2012.

Результат исследований: Материалы для журналаСтатья

Klir, D, Shishlov, AV, Kubes, P, Rezac, K, Fursov, FI, Kokshenev, VA, Kovalchuk, BM, Kravarik, J, Kurmaev, NE, Labetsky, AY & Ratakhin, NA 2012, 'Deuterium gas puff Z-pinch at currents of 2 to 3 mega-ampere', Physics of Plasmas, том. 19, № 3, 032706. https://doi.org/10.1063/1.3696859
Klir D, Shishlov AV, Kubes P, Rezac K, Fursov FI, Kokshenev VA и соавт. Deuterium gas puff Z-pinch at currents of 2 to 3 mega-ampere. Physics of Plasmas. 2012 Март 1;19(3). 032706. https://doi.org/10.1063/1.3696859
Klir, D. ; Shishlov, A. V. ; Kubes, P. ; Rezac, K. ; Fursov, F. I. ; Kokshenev, V. A. ; Kovalchuk, B. M. ; Kravarik, J. ; Kurmaev, N. E. ; Labetsky, A. Yu ; Ratakhin, N. A. / Deuterium gas puff Z-pinch at currents of 2 to 3 mega-ampere. В: Physics of Plasmas. 2012 ; Том 19, № 3.
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abstract = "Deuterium gas-puff experiments have been carried out on the GIT-12 generator at the Institute of High Current Electronics in Tomsk. The emphasis was put on the study of plasma dynamics and neutron production in double shell gas puffs. A linear mass density of deuterium (D 2) varied between 50 and 85 g/cm. Somewhat problematic was a spread of the D 2 gas at a large diameter in the central anode-cathode region. The generator operated in two regimes, with and without a plasma opening switch (POS). When the POS was used, a current reached a peak of 2.7 MA with a 200 ns rise time. Without the POS, a current rise time approached 1500 ns. The influence of different current rise times on neutron production was researched. Obtained results were important for comparison of fast deuterium Z-pinches with plasma foci. Average DD neutron yields with and without the POS were about 10 11. The neutron yield seems to be dependent on a peak voltage at the Z-pinch load. In all shots, the neutron emission started during stagnation. At the beginning of the neutron production, the neutron emission correlated with soft x-rays and a significant fraction of neutrons could be explained by the thermonuclear mechanism. Nevertheless, a peak of the neutron emission occurred 40 ns after a soft x-ray peak. At this very moment, hard x-rays above 1 MeV were detected and a rapid expansion with a velocity of 3 10 5 m/s was observed. In the case of the POS, 1 MeV widths of radial neutron spectra implied that there are deuterons with the energy above 200 keV moving in the radial direction. On the basis of D 2 gas puff experiments in the 0.3-17 MA region, the neutron yield dependence on a current as Y I 3. 0 0. 2 was proposed.",
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T1 - Deuterium gas puff Z-pinch at currents of 2 to 3 mega-ampere

AU - Klir, D.

AU - Shishlov, A. V.

AU - Kubes, P.

AU - Rezac, K.

AU - Fursov, F. I.

AU - Kokshenev, V. A.

AU - Kovalchuk, B. M.

AU - Kravarik, J.

AU - Kurmaev, N. E.

AU - Labetsky, A. Yu

AU - Ratakhin, N. A.

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