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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.

X pinch as a source for X-ray radiography

Pikuz S., Shelkovenko T., Romanova V., Sinars D., Hammer D., Bland S., Lebedev S.

Nukleonika

2001

Vol. 46, nr 1

21-25

This article describes several applications and methods using the X pinch as a source of X-ray radiation for the radiography of dense plasma objects. These methods, in general, do not use pinholes, and instead take the advantage of the small size (<1 mm, and in some cases <3 mm) and a short X-ray emission duration (<1 ns) of the radiation source produced by an X pinch. Two of these methods, monochromatic and direct point-projection backlighting, are discussed. Experimental images of exploding wires and wire arrays obtained on the BIN, XP, and MAGPIE generators using these techniques are presented. Also included are detailed measurements made on the XP generator of the emission characteristics of X pinches using different wire materials.