Numerical Simulation of Ni-Like Xe-Plasma Dynamics and Laser Gain in a Low-Inductive Capillary Discharge

Artyukov, I.A.; Burtsev, V.A.; Feshchenko, R.M.; Kalinin, N.V.

Авторы: Artyukov I.A., Burtsev V.A., Feshchenko R.M., Kalinin N.V.
Журнал: Journal of Russian Laser Research
Том: 41
Номер: 4
Год издания: 2020
Издательство: Kluwer Academic/Plenum Publishers
Местоположение издательства: United States
Первая страница: 424
Последняя страница: 433
DOI: 10.1007/s10946-020-09895-5
Аннотация: -ray lasers based on transitions in highly-charged Ni-like ions generating in the “water window” wavelength range can be pumped by compact laboratory discharge sources. In this paper, we report the results of numerical simulations of the plasma dynamics and kinetics in an X-ray laser based on transitions in Ni-like xenon ions. The laser active medium is created by an extended low-inductive high-current Z-discharge capable of producing two successive electrical pulses. The nonequilibrium multicharged ion-plasma dynamics is studied numerically using a nonstationary 1D two-temperature radiation (MHD) model, which describes plasma hydrodynamics, nonstationary ionization, transfer of the continuum and line radiation, as well as processes in the pumping electrical circuit. The ionicenergy-level populations are calculated in the quasistationary approximation. The simulation results allowed to determine the electrical and energy-pumping parameters needed to obtain a weak signal gain for the working transitions of the order of g+∼ 1 cm−1. We demonstrate that plasma with the electronic temperature of more than 400 eV and the density of more than 1019 cm−3 can be created by a low inductive two-step discharge with peak current exceeding 200 kA.
Добавил в систему: Артюков Игорь Анатольевич

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Numerical Simulation of Ni-Like Xe-Plasma Dynamics and Laser Gain in a Low-Inductive Capillary Dischargeстатья