Measuring of spatio-temporal characteristics Z-pinch from deuterated polyethylene |
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Authors: | A A Akunets S S Anan’ev Yu L Bakshaev P I Blinov V A Bryzgunov A S Chernenko S A Dan’ko E D Kazakov V D Korolev B R Meshcherov S L Nedoseev V G Pimenov E A Smirnova G I Ustroev V V Vikhrev I V Volobuyev A A Zelenin |
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Institution: | (1) Lebedev Physical Institute of the Russian Academy of Science, Moscow, Russia;(2) Institute of Nuclear Synthesis, the Russian Research Centre “Kurchatov Institute”, Moscow, Russia;(3) Zelinsky Institute of Organic chemistry of the Russian Academy of Science, Moscow, Russia |
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Abstract: | On the S-300 installation at currents up to 2 MA with rise time 100 ns, the investigation of the formation process of high-temperature
plasma in fast Z-pinch was carried out. The central part of the loads was made from agar-agar and represented a deuterated
polyethylene cylinder with small density 50 and 75 mg/sm3 and 1–2 mm diameter. On the ICT images, obtained in optical and soft X-ray range of a spectrum with 3–5 ns exposition, it
is visible that on the axis of the polyethylene cylinder at the current`s rise time a cord is formed and it is separated into
bright formations. They were observed on a background of a luminous area which occupied the initial neck volume. On time-integrated
pinhole pictures obtained in SXR range (E > 1–4 keV), hot points with minimal size of 50 microns were registered. From the
chronograms results, obtained by means of the optical high-speed-streak camera mount along the neck axis with time resolution
< 1 ns, it follows that luminous formations arise sequentially during the different time moments (in 10–30 ns). Occurrence
of luminous formations was accompanied by X-ray radiation occurrence with energy E > 1 keV with short duration of 2–4 ns.
Simultaneously with X-ray radiation neutrons with the maximal yield of 4.5×109 were registered. The average energy measured in 4 directions under angles with an axis of: 0○ (above the anode), 90○, 180○ (under the cathode) and 270○, were accordingly: 2.4±0.2, 2.5±0.1, 2.5±0.1, 2.5±0.1 MeV. |
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Keywords: | PACS" target="_blank">PACS 52 58 Lq Z-pinches plasma focus and other pinch devices |
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