Abstract
Feasible soft-X-ray amplification in the CVI and NVII Balmer transition is investigated in a capillary discharge. The best conditions and parameters for the experimental set-up are found for an ablative capillary. The most optimistic results have shown that the gain would be greater than one, which is the condition for successful ASE (Amplified spontaneous emission) in capillary discharges. The capillary discharge evolution is modeled using the NPINCH program, employing a one-dimensional physical model based on MHD equations. The information about the capillary discharge evolution is processed in the FLY, FLYPAPER, FLYSPEC programs, enabling the population to be modeled on specific levels during capillary discharge.
Highlights
Non-stationary plasma of a fast capillary electrical discharge was studied as a potential active medium for a soft X-ray laser
The second experiment involves plasma being created by a discharge by ionizing material ablated from capillary walls [3]
The modified Shin experiment was simulated by our software equipment (NPINCH, FLY)
Summary
Non-stationary plasma of a fast capillary electrical discharge was studied as a potential active medium for a soft X-ray laser. The second experiment involves plasma being created by a discharge by ionizing material ablated from capillary walls [3]. The capillary pinch dynamics is determined by many selected parameters: the capillary geometry (radius and capillary length), the substance of the capillary (alumina — Al2O3, bornitrid — BN), the filling substance (carbon, nitrogen), the initial filling density (pressure), and the electric current time dependence. This dependence, in particular, is given by an electric circuit that is joined to the capillary. The main variable for ASE is the gain [4, 13], and the most important goal of this paper is to understand the impact of each capillary parameter on the maximum gain value
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