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Temporal distribution of linear densities of the plasma column in a plasma focus discharge

Cikhardtova B., Kubeš P., Cikhardt J., Paduch M., Zielinska E., Kravárik J., Řezáč K., Kortanek J., Šíla O.

Nukleonika

2015

Vol. 60, No. 2

315--318

Experiments were carried out on the PF-1000 plasma focus device, with a deuterium filling and with deuterium puffing from a gas-puff nozzle placed on the axis of the anode face. The current was reaching 2 MA. 15 interferometric frames from one shot were recorded with a Nd:YLF laser and a Mach–Zehnder interferometer, with 10–20 ns delay between the frames. As a result, the temporal and spatial distribution of the linear densities and the radial and axial velocities of the moving of plasma in the dense plasma column could be estimated.

Magnetic field measurements on PF - 1000 and PF - 3 facilities: current sheath structure and neutron scaling

Krauz V. I., Mitrofanov K. N., Scholz M., Myalton V. V., Paduch M., Grabovskii E. V., Karpinski L., Koidan V. S., Vinogradov V. P., Vinogradova Y. V., Zielinska E.

Nukleonika

2012

Vol. 57, No. 2

201-204

The comparative analysis of the magnetic field distribution, the dynamics and structure of the plasma current sheath, and the neutron yield scaling in two largest plasma focus facilities, PF-3 and PF-1000 is done. The power-low dependence of the neutron yield on the current in the imploding plasma sheath has been demonstrated experimentally. For the first time the presence of the Bz magnetic field components is experimentally shown.

Important issues in high - current plasma experiments of the Z - pinch type

Sadowski M. J., Scholz M.

Nukleonika

2012

Vol. 57, No. 1

11-24

This paper is based on an invited lecture given at the 10th International Workshop and Summer School "Towards Fusion Energy", which was held in Kudowa Zdrój, Poland, on June 12–18, 2011. A concise review is presented of the known experimental results on various plasma Z-pinch experiments supplied by high-voltage and high-current pulsed power generators. The most important issues and the most valuable results in this domain are highlighted. A broad class of various Z-pinches is considered, including simple inter-electrode discharges, single exploding wires, so-called X-pinches, cylindrical wire-array Z-pinches, radial wire-array discharges, conical wire-array experiments, and gas-puffed Z-pinches. Non-cylindrical Z-pinch discharges (often called plasma focus experiments) are also briefly characterized. The most important characteristics of each category of experiments are outlined. Particular attention is paid to fusion-oriented high-power Z-pinch experiments and the problems encountered in experiments with various sophisticated fusion targets. The main issues in the described Z-pinch experiments are identified. Finally, new trends in the dense Z-pinch research are described.