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Time evolution of the x-ray emission from a micropinch in a vacuum spark discharge

: Hebach, M.; Engel, A.; Schulz, A.; Lebert, R.; Kunze, H.-J.


epl. A letters journal exploring the frontiers of physics 21 (1993), No.3, pp.311-316 : Abb.,Lit.
ISSN: 0302-072X
ISSN: 0295-5075
ISSN: 1286-4854
Journal Article
Fraunhofer ILT ()
brigth spot; density; discharge; micropinch plasma; photoabsorption; plasma; radiation source; radiative-collapse model; triplet system

The spectrum of the soft-X-ray emission of a Mg- micropinch plasma in a vacuum spark device has been recorded as a function of time, by employing a streak camera. The emission from the He-like ions occurs in two bursts - a very intense one of 200 ps duration and a second one of lower intensity but with a duration of 400 ps. The observations support the radiative-collapse model as explanation of the micropinching process and of the formation of the tiny hot plasmas of subnanosecond lifetimes.