1988
DOI: 10.1088/0022-3727/21/12/028
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The formation of the micropinch structure in plasma focus by the addition of heavy impurities

Abstract: The results of an experimental study of the formation of micropinches (MP) in a plasma focus discharge in the presence of small impurities of heavy gas are reported. MPS of 10-100 mu m in size are observed and the X-ray spectra of multicharged ions of the impurity (Xe) are registered.

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Cited by 42 publications
(23 citation statements)
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“…However, it is possible to have a regime that produces small plasma points with sizes of several pm in a -1 MA current discharge (Gol'ts 1986/7;Sopkin 1990). Similar phenomena are seen in experiments on a plasma focus discharge in a -mixture of deuterium and heavy noble gases (Peacock 1969;Volobuev 1988;Koshelev 1988). Similar observations come from plasma focus experiments: Plasma points with size -10 ,um arise in the second compression of the focus, when the hydrogen plasma increases its radiation loss through additional anode material (copper) (Fillipov 1983).…”
Section: Discussionsupporting
confidence: 55%
“…However, it is possible to have a regime that produces small plasma points with sizes of several pm in a -1 MA current discharge (Gol'ts 1986/7;Sopkin 1990). Similar phenomena are seen in experiments on a plasma focus discharge in a -mixture of deuterium and heavy noble gases (Peacock 1969;Volobuev 1988;Koshelev 1988). Similar observations come from plasma focus experiments: Plasma points with size -10 ,um arise in the second compression of the focus, when the hydrogen plasma increases its radiation loss through additional anode material (copper) (Fillipov 1983).…”
Section: Discussionsupporting
confidence: 55%
“…Observations of bright-spots in a number of different Z-pinch configurations ͑vacuum sparks, 4,6,12 post-stagnation gas-puff Z-pinches, 5,13 plasma foci, 7,14 and fiber Z-pinches 1-3,9,11 ͒ have given rise to a wide range of explanations for formation processes ͑energy deposition from electron beams, 4,5 radiative collapse, 6,7,15 and the mϭ0 instability 1,9 ͒.…”
Section: Introductionmentioning
confidence: 99%
“…Discharges with Experiments and simulations on the possibility of radiative contraction/collapse in the PF-1000 plasma focus small amounts of heavy impurity gases lead to the formation of small high-density hot spots, which were interpreted as result of a local radiative collapse caused by strong line radiation losses and outfl ow of plasma from the neck regions of an m = 0 instability [7]. Here we report the fi rst investigations to study radiative contraction/collapse in the plasma focus device PF-1000 experimentally combined with numerical simulations.…”
Section: Introductionmentioning
confidence: 99%