Pavel Kubeš1, Josef Kravárik1, Daniel Klír1, Marek Scholz2, Marian Paduch2, Krzysztof Tomaszewski2, Leslaw Karpinski2, Leszek Ryć2, Libor Juha3, Josef Krása3, Adam Szydlowski4, Vera Romanova5
1Czech Technical University, 2 Technická Str., 166 27 Prague 6, Prague, Czech Republic,
2Institute of Plasma Physics and Laser Microfusion, 23 Hery Str., 00-908 Warsaw, P.O. Box 49, Poland,
3Institute of Physics, Academy of Sciences of the Czech Republic, 2 Na Slovance Str., 180 40 Prague 8, Czech Republic,
4The Andrzej Soltan Institute of Nuclear Studies, 05-400 Otwock-Swierk, Poland,
5Physical Lebedev Institute, Russian Academy of Sciences, 53 Leninski pr., 117924 Moscow, Russia
We present the results of experiments focused on energy transformations during the implosion of the hydrogen current sheath towards an Al wire (120 mm in diameter) positioned on the top of the inner electrode of the PF-1000 plasma focus facility at the IPPLM in Warsaw. A wire corona is formed at the current sheath impact and ~60 ns after the impact a soft X-ray pulse is emitted. Its spectrum contains Al VI-XII lines accompanied by their satellites. The amount of emitted energy is recorded by two filtered PIN diodes and thermoluminescent dosimeters and depends on symmetry of the current sheath and quality of the current sheath focus. The mean value of energy of keV photons emitted in the runs done without the wire (~1 J) is higher than the energy obtained with the wire (~0.4 J). A time delay between the impact of the current sheath and X-ray pulse, the plasma focus dynamics and soft X-ray emission are interpreted by an axial magnetic field generation and transformations.