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Article overview
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Numerical simulation of Ni-like Xe plasma dynamics and laser gain in a low inductivity capillary discharge | N.V. Kalinin
; R.M. Feshchenko
; I.A. Artyukov
; V.A. Burtsev
; | Date: |
21 May 2019 | Abstract: | X-ray lasers based on transitions in highly charged extit{Ni}-like ions
generating in the "water window" wavelength range can be pumped by compact
laboratory discharge sources. This makes them promising candidates for use as
compact coherent X-ray sources in laboratory applications including biological
imaging and investigations of carbon containing materials. In this paper, the
results of numerical simulations of the plasma dynamics and kinetics in an
X-ray laser based on transitions in extit{Ni}-like xenon ions are reported.
The laser active medium is created by an extended low-inductive high current
Z-discharge capable of producing two successive electrical pulses. The
non-equilibrium multi-charged ion plasma dynamics is studied numerically using
a non-stationary 1D two-temperature radiation-MHD model, which describes plasma
hydrodynamics, non-stationary ionization, transfer of the continuum and line
radiation as well as processes in the pumping electrical circuit. The ionic
energy level populations are calculated in the quasi-stationary approximation.
The simulation results allowed determination of the electrical and energy
pumping parameters necessary to obtain a weak signal gain for the working
transitions of the order of $g^+sim1$ $mbox{cm}^{-1}$. It was demonstrated
that plasma with the electronic temperature of more than 400 eV and the density
of more than $10^{19}$ $mbox{cm}^{-3}$ can be created by a low inductive two
step discharge with peak current exceeding 200 kA. | Source: | arXiv, 1905.8844 | Services: | Forum | Review | PDF | Favorites |
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