Hannover 2010 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 18: Poster: Diagnostics

P 18.14: Poster

Donnerstag, 11. März 2010, 16:00–18:00, Lichthof

Investigation of Table Top X-Pinches — •Hannes Bohlin — Max-Planck-Institut für Plasmaphysik, Greifswald, Germany

The X-pinch is created by passing a large current through two or more wires crossed and touching at a single point. The X-pinch has been found to be an excellent source of high intensity, short duration X-rays, which has led to a wide range of applications in areas such as lithography, radiography, biomedicine, and materials science. An investigation was carried out relating to how the characteristics of the X-rays emissions and plasma dynamics of X-pinches change with the number of wires utilized. The pinches were created by passing a 58ns, 38kA current pulse through 5*m tungsten wires. Wire configurations using 2, 3, 4, and 6 wires were used. The main diagnostic tools consisted of a CCD camera for time-integrated optical images, a pinhole camera to record time-integrated images of the X-ray emissions and X-ray diodes to determine the pinch time. X-pinches with a greater number of wires were found to result in an increase in size and intensity of the vertical plasma jets, as well as an increase in the time taken before the pinch would occur.