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Neutron emission parameters from the collapse of the condensed Z-pinch

Anan'ev S. S., Bakshaev Y. L., Bryzgunov V. A., Chernenko A. S., Dan'ko S. A., Kazakov E. D., Klír D., Korolev V. D., Smirnova E. A., Ustroev G. I., Vikhrev V. V.

Nukleonika

2012

Vol. 57, No. 3

333-336

The parameters of neutron emission from the neck of the condensed Z-pinch, were measured at an S-300 installation (2 MA, 100 ns). Profiled loads with central parts made from microporous deuterated polyethylene (with a density of 100 mg/cm3) were used in the experiments. Neutron emission parameters were measured by the time-of-flight (TOF) method. Neutrons were registered using four flight bases with 10 scintillation detectors which were placed at two axial and two radial directions. It was found that the mean neutron energy, determined by the TOF method, turned out to be anisotropic. The average energy of neutrons emitted along the axis towards the cathode, was shifted to higher energy (2.6-2.8 MeV) and the average energy of neutrons emitted towards the anode, was shifted to lower energy (2.1-2.3 MeV) compared to the d-d reaction neutron energy 2.45 MeV. The average energy of neutrons, emitted in two opposite radial directions, was close to 2.45 MeV. The half-width of the energy distributions reconstructed for all directions was 400-500 keV. The analysis of the experimental results demonstrated that the found phenomena could be explained by a slowly decaying high energy tail in the energy distribution of colliding deuterons. The maximal neutron yield was of 6 x 109.

Stabilizing of Z-pinch and Plasma Focus discharges due to thick wires

Kubeš P., Kravárik J., Paduch M., Tomaszewski K., Scholz M., Karpinski L., Szydlowski A., Bakshaev Y., Blinov P., Chernenko A. S., Gordeev E. M., Dan’ko S. A., Korolev V. D., Shashkov A., Tumanov V. I., Romanova V., Klír D.

Nukleonika

2001

Vol. 46, nr 1

5-7

This paper presents the results of the diagnostics observing the impact of the plasma sheath imploded in megaamper Z-pinch or plasma focus devices onto the Al or C wires of 30-300 mi m in diameter fixed in the center axis. The discharges were operated with a maximum current of 1.5-3 MA at two devices, PF 1000 at IPFLM in Warsaw, and Stand 300 at RRC Kurchatov Institute in Moscow. At the plasma impact the 10-50 ns XUV pulse was emitted in K-shell lines from the ring or helical-like forms on the surface of the wire corona. The scenario of the production of the non-equilibrium intensities of the C and Al H-like and He-like lines is discussed considering fast transformation of magnetic field, electron beams acceleration, total ionization of the ions and fast recombination in dense and magnetized wire corona.