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1971
Publisher Summary This chapter describes the dense plasma focus. Dense plasma focus (DPF) is a plasma discharge with plasma densities n > l0 l9 /cm 3 and temperatures of a few kilo electron volts lasting 100 to 150 nsec. The focus is conjectured to be a short but finite two-dimensional z -pinch forming near or at the end of a coaxial plasma ...
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Publisher Summary This chapter describes the dense plasma focus. Dense plasma focus (DPF) is a plasma discharge with plasma densities n > l0 l9 /cm 3 and temperatures of a few kilo electron volts lasting 100 to 150 nsec. The focus is conjectured to be a short but finite two-dimensional z -pinch forming near or at the end of a coaxial plasma ...
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Dense plasma-focus research in Poland
IEEE Conference Record - Abstracts. 1997 IEEE International Conference on Plasma Science, 2002Summary form only given. Recent plasma focus (PF) experiments, as performed with different PF facilities of energy from 2 kJ to 440 kJ, are compared. The MAJA machine, operated up to 60 kJ/35 kV, is used for X-ray and fast e-beams studies. X-rays are measured with pinhole cameras and scintillation detectors with foil filters.
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Filamentation in the pinched column of the dense plasma focus
Physics of Plasmas, 2017The paper describes the filamentary structure observed in the high-energy ultraviolet radiation for discharges performed at the hydrogen- or deuterium-filling and at the puffing of hydrogen, deuterium or helium, in a mega-ampere dense plasma-focus facility. The lifetime of this structure overcomes 50 ns. These filaments connect the surface of a pinched
P. Kubes +11 more
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Neutron emission studies in dense plasma focus
AIP Conference Proceedings, 1989Neutron emission studies in dense plasma focus under low pressure and high pressure operation has been carried out. Parametric studies of dynamic behavior of plasma focus also has been made by means of laser holographic interferometry, nuclear activation methods and neutron T. O. F detection including pinhole camera.
M. Yokoyama, Y. Kitagawa, Y. Yamada
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Hydromagnetic Instabilities in the Dense Plasma Focus
The Physics of Fluids, 1969Coaxial discharges of the Mather type owe their performance to the rapid collapse of a noncylindrical current sheath into a dense plasma focus. The lifetime of the resulting fountainlike pinch column appears to be governed by the formation of sausage instabilities; however, typical estimates of the buildup time for m = 0 hydromagnetic instabilities in ...
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1970
Recent successful experiments by Filippov et al. [1] using an intense pulsed discharge in deuterium at an initial pressure of ∼ 1 mm Hg and a peak current of ∼106 A have stimulated theoretical attempts to understand the significantly favorable plasma parameters (as compared with earlier work) that were obtained in these experiments: T ∼ 1 keV, n ∼109 ...
V. F. D’yachenko, V. S. Imshennik
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Recent successful experiments by Filippov et al. [1] using an intense pulsed discharge in deuterium at an initial pressure of ∼ 1 mm Hg and a peak current of ∼106 A have stimulated theoretical attempts to understand the significantly favorable plasma parameters (as compared with earlier work) that were obtained in these experiments: T ∼ 1 keV, n ∼109 ...
V. F. D’yachenko, V. S. Imshennik
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1985
Abstract : Research on this grant has focused on plasma focus experiments in the areas of particle beam generation and as a potential repetitive opening switch. In pursuing the former unique diagnostic tools were developed to measure the scaling of particle beam current and energy for both the electron and ion beams generated by the device ...
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Abstract : Research on this grant has focused on plasma focus experiments in the areas of particle beam generation and as a potential repetitive opening switch. In pursuing the former unique diagnostic tools were developed to measure the scaling of particle beam current and energy for both the electron and ion beams generated by the device ...
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Deposition of nanolayers by means of dense plasma focus
Czechoslovak Journal of Physics, 2006In our preliminary experiments, reported in this paper, dense plasma focus (DPF) device is used for deposition of thin (a few nanometers of thickness) chromium layers. Such films have been deposited on silicon wafers by ablation of the chromium target using highly dense and highly temperature argon-oxygen plasma. Two films with different structure were
M. Chernyshova +6 more
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A high-neutron-output dense plasma focus
Physics Letters A, 1988Abstract A 1.4 kJ ultra-clean Mather-type dense plasma focus has produced 14 MeV neutrons on over 600 consecutive shots without a misfire and without purging the gas. The D-T neutron output decreased from (3.4 ± 0.7) × 109 to (2.1±0.6) × 109. After 650 shots, the original D-T neutron output was restored by purging hydrogen and helium gas.
E.J.T. Burns +6 more
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Applications of a neutron-producing dense plasma focus
SPIE Proceedings, 1997A plasma focus is an rz-plasma pinch device that may preferentially produce either x-rays or neutrons. In its neutron-production mode, the neutron pulse duration is approximately 10 12 neutrons/pulse from the d(d,n) 3 He(dd) reaction. The equivalent neutron yield form the d(t,n) 4 He(dt) reaction is approximately 10 14 neutrons/pulse.
Floyd. D. McDaniel +2 more
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