Formation of tight plasma pinches and generation of high-power soft x-ray radiation pulses in fast Z-pinch implosions |
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Authors: | A V Shishlov R B Baksht S A Chaikovsky A V Fedunin F I Fursov V A Kokshenev N E Kurmaev A Yu Labetsky V I Oreshkin N A Ratakhin A G Russkikh S V Shlykhtun |
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Institution: | (1) Siberian Division of Russian Academy of Sciences, Institute of High Current Electronics, Academicheskii prosp. 2/3, Tomsk, 634055, Russia |
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Abstract: | Argon K-shell plasma radiation source experiments were carried out on the GIT-12 generator Bugaev, S.P. et al., 1997, Russian Phys. Journal, 40, 38] for a long (300 ns) implosion regime. The performance of a shell-on-solid-fill double gas puff was characterized in
the experiments with and without an external axial magnetic field. The maximum Ar K-shell radiation yield registered in the
experiments without an axial magnetic field was at the level of 1100 J/cm. This yield is consistent with the theoretically
predicted yield for a short (100 ns) implosion regime. The experiments showed that the initial magnetic field which provides
stabilization of the shell-on-solid-fill double gas puff was lower than that required for stabilization of a single annular
gas puff. Satisfactory stabilization of the double gas puff was observed at an initial axial magnetic field of 1.4 kG. The
maximum Ar K-shell radiation yield registered in the experiments with the axial magnetic field did not exceed 400 J/cm. A
sharp reduction of the K-shell yield cannot be explained only by taking into account the energy losses associated with the
compression of the axial magnetic field.
Original Text ? Astro, Ltd., 2006. |
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