Abstract
Results are presented from experimental studies of the plasma formation dynamics in a Z-pinch produced from a cylindrical microporous agar-agar load. The experiments were performed on the S-300 facility at a current of 2 MA and current rise time of 100 ns. To enhance the energy concentration, a deuterated polyethylene neck with a mass density of 50–75 μg/cm3 and diameter of 1–2 mm was made in the central part of the load. The spatiotemporal characteristics of the Z-pinch were studied using an optical streak camera and fast frame photography in the optical and soft X-ray spectral ranges. X-ray emission was detected using semiconductor and vacuum diodes, and neutron emission was studied by means of the time-of-flight method. It is found that, in the course of continuous plasma production, hot spots with a diameter of 100 μm form in the pinch plasma. The hot spots emit short soft X-ray pulses with a duration of 2–4 ns, as well as neutron pulses with an average neutron energy of about 2.45 MeV. The maximum neutron yield was found to be 4.5 × 109 neutrons per shot. The scenario of hot spot formation is adequately described by two-dimensional MHD simulations.
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Original Russian Text © A.A. Akunets, S.S. Anan’ev, Yu.L. Bakshaev, P.I. Blinov, V.A. Bryzgunov, V.V. Vikhrev, I.V. Volobuev, S.A. Dan’ko, A.A. Zelenin, E.D. Kazakov, V.D. Korolev, B.R. Meshcherov, S.L. Nedoseev, V.G. Pimenov, E.A. Smirnova, G.I. Ustroev, A.S. Chernenko, V.A. Shchagin, 2010, published in Fizika Plazmy, 2010, Vol. 36, No. 8, pp. 747–756.
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Akunets, A.A., Anan’ev, S.S., Bakshaev, Y.L. et al. Formation of hot spots in the plasma of a Z-pinch produced from low-density deuterated polyethylene. Plasma Phys. Rep. 36, 699–708 (2010). https://doi.org/10.1134/S1063780X10080064
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DOI: https://doi.org/10.1134/S1063780X10080064