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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.

Studies of Plasma-Focus discharges within the PF-360 facility equipped with needle D2O-ice target

Baranowski J., Jakubowski L., Sadowski M., Zebrowski J.

Nukleonika

2001

Vol. 46, suppl. 1

69--71

The paper describes a new technique which has been investigated in order to overcome the neutron saturation effect and to increase the neutron yield from the plasma-focus (PF) discharges [1]. The PF-360 experimental facility was constructed at the Andrzej Soltan Institute for Nuclear Studies (IPJ) in Swierk, Poland in the late 70s [4, 5]. Recently in order to improve the neutron yield from the PF-360 machine, it was proposed to use a cryogenic deuterium target, which might be placed within the plasma-focus region. For this purpose, we have been made a needle-like cryogenic target covered with a thin „heavy-ice“ layer. A considerable increase in the average neutron yield (from 1.7×1010 to about 2.2×1010 neutrons/shot) has been achieved for 122 kJ PF discharges when the needle target top was placed at a distance of about 100 mm from the electrode ends.

Investigation of Plasma Focus discharges in the PF-360 facility with additional D2 gaspuffed targets

Stanislawski J., Baranowski J., Sadowski M., Zebrowski J.

Nukleonika

2001

Vol. 46, suppl. 1

73--75

The paper describes experimental studies of Plasma-Focus (PF) discharges carried out within the modernized PF- 360 facility, which was operated with an additional D2-gas puffing into the region of the collapsing current sheath and PF pinch formation, i.e. into space in front of the electrode outlet. The main aim of these studies was to increase a neutron yield from PF discharges by using fast deuteron beams, which are usually emitted from a pinch column and which can interact with additional D2-gas target.