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Dense plasma in Z-pinches and the plasma focus
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1981Abstract Many of the earliest experiments in controlled thermonuclear fusion research were Z-pinches. However these pinches were found to be highly unstable to the m = 0, the m — 1 (kink), and the Rayleigh-Taylor instability. The addition of an axial magnetic field and the removal of end losses by proceeding to a toroidal geometry has
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Characteristics of the Dense Plasma Focus Discharge
The Physics of Fluids, 1968The dense plasma focus discharge is produced in a hydromagnetic coaxial plasma accelerator. The final heating and compression of the plasma is accomplished by a partial conversion of the stored magnetic energy residing in the region behind the current sheath to plasma energy.
Joseph W. Mather, Paul J. Bottoms
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Neutron Yield in a Repetitive Dense Plasma Focus
Japanese Journal of Applied Physics, 1982A first, preliminary result of the neutron yield from a repetitively produced dense plasma focus is reported, where the repetitive focalization of plasma is performed at the top end of the inner electrode of the plasma focus device. The number of repetitions of plasma was elected to be more than 10 in a single discharge of the capacitor bank.
Isao Ueno +5 more
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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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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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Infrared radiation from the dense plasma focus
The Physics of Fluids, 1974Experimental observations of infrared emission (2-10.6 μm) from a dense plasma focus have been made, along with the standard diagnostics of neutrons, x rays, and visible light. The thermal bremsstrahlung spectrum has been observed over the range 2 μm ≲ λ ≲ 6.5 μm.
Richard S. Post, T. C. Marshall
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Initial conditions in the hawk dense plasma focus
2019 IEEE Pulsed Power & Plasma Science (PPPS), 2019The 670 kA Hawk pulsed power generator at NRL has been configured as a fast (1.2 µs rise time), high inductance (607 nH) driver for a dynamic dense plasma focus (DPF) load in order to create a testbed for the study of charged particle acceleration mechanisms in imploding plasmas. The current pulse is initiated in a deuterium plasma injected radially by
J. T. Engelbrecht +9 more
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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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