Compression dynamics of quasi-spherical wire arrays with different linear mass profiles
- Авторы: Mitrofanov K.1, Aleksandrov V.1, Gritsuk A.1, Grabovski E.1, Frolov I.1, Laukhin Y.1, Oleinik G.1, Ol’khovskaya O.2
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Учреждения:
- Troitsk Institute for Innovation and Thermonuclear Research
- Keldysh Institute of Applied Mathematics
- Выпуск: Том 42, № 9 (2016)
- Страницы: 834-858
- Раздел: Plasma Dynamics
- URL: https://journals.rcsi.science/1063-780X/article/view/185933
- DOI: https://doi.org/10.1134/S1063780X16090063
- ID: 185933
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Аннотация
Results of experimental studies of the implosion of quasi-spherical wire (or metalized fiber) arrays are presented. The goal of the experiments was to achieve synchronous three-dimensional compression of the plasma produced in different regions of a quasi-spherical array into its geometrical center. To search for optimal synchronization conditions, quasi-spherical arrays with different initial profiles of the linear mass were used. The following dependences of the linear mass on the poloidal angle were used: ml(θ) ∝ sin–1θ and ml(θ) ∝ sin–2θ. The compression dynamics of such arrays was compared with that of quasi-spherical arrays without linear mass profiling, ml(θ) = const. To verify the experimental data, the spatiotemporal dynamics of plasma compression in quasi-spherical arrays was studied using various diagnostics. The experiments on three-dimensional implosion of quasi-spherical arrays made it possible to study how the frozen-in magnetic field of the discharge current penetrates into the array. By measuring the magnetic field in the plasma of a quasi-spherical array, information is obtained on the processes of plasma production and formation of plasma flows from the wire/fiber regions with and without an additionally deposited mass. It is found that penetration of the magnetic flux depends on the initial linear mass profile ml(θ) of the quasi-spherical array. From space-resolved spectral measurements and frame imaging of plasma X-ray emission, information is obtained on the dimensions and shape of the X-ray source formed during the implosion of a quasi-spherical array. The intensity of this source is estimated and compared with that of the Z-pinch formed during the implosion of a cylindrical array.
Об авторах
K. Mitrofanov
Troitsk Institute for Innovation and Thermonuclear Research
Автор, ответственный за переписку.
Email: mitrofan@triniti.ru
Россия, Troitsk, Moscow, 142190
V. Aleksandrov
Troitsk Institute for Innovation and Thermonuclear Research
Email: mitrofan@triniti.ru
Россия, Troitsk, Moscow, 142190
A. Gritsuk
Troitsk Institute for Innovation and Thermonuclear Research
Email: mitrofan@triniti.ru
Россия, Troitsk, Moscow, 142190
E. Grabovski
Troitsk Institute for Innovation and Thermonuclear Research
Email: mitrofan@triniti.ru
Россия, Troitsk, Moscow, 142190
I. Frolov
Troitsk Institute for Innovation and Thermonuclear Research
Email: mitrofan@triniti.ru
Россия, Troitsk, Moscow, 142190
Ya. Laukhin
Troitsk Institute for Innovation and Thermonuclear Research
Email: mitrofan@triniti.ru
Россия, Troitsk, Moscow, 142190
G. Oleinik
Troitsk Institute for Innovation and Thermonuclear Research
Email: mitrofan@triniti.ru
Россия, Troitsk, Moscow, 142190
O. Ol’khovskaya
Keldysh Institute of Applied Mathematics
Email: mitrofan@triniti.ru
Россия, Miusskaya pl. 4, Moscow, 125047