Studies of plasma flow spatial asymmetry using Mach probe in GOL-NB device

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Abstract

The results of preliminary experiments on measuring the spatial asymmetry of plasma flows in the GOL-NB device using movable Mach probe are presented and the diagnostics used is described. In the experiments, the high-field sections were mounted in the configuration with solenoidal magnetic field. The dynamics of plasma flows was recorded which was expected in the trap: the plasma flowed from the plasma gun along the magnetic field, accumulated in the GOL-NB central trap, and then after the plasma gun was switched off, flowed out from the central trap in two directions. At time of transition from the stage of plasma accumulation to the stage of its decay, the direction of plasma flow in the input high-field section was inverted. The balance of particles in the central trap is discussed. Experiments have shown that this technique can be used for studying the effects of improving plasma confinement after switching to the multiple-mirror configuration of high-field sections, in which, according to theory, under optimal conditions, a flow of backscattered particles should arise, which will return them from the multiple-mirror sections to the confinement zone.

About the authors

E. N. Sidorov

Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences

Author for correspondence.
Email: E.N.Sidorov@inp.nsk.su
Russian Federation, Novosibirsk, 630090

V. I. Batkin

Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences

Email: E.N.Sidorov@inp.nsk.su
Russian Federation, Novosibirsk, 630090

I. A. Ivanov

Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences

Email: E.N.Sidorov@inp.nsk.su
Russian Federation, Novosibirsk, 630090

K. N. Kuklin

Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences

Email: E.N.Sidorov@inp.nsk.su
Russian Federation, Novosibirsk, 630090

N. A. Melnikov

Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences

Email: E.N.Sidorov@inp.nsk.su
Russian Federation, Novosibirsk, 630090

S. V. Polosatkin

Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences

Email: E.N.Sidorov@inp.nsk.su
Russian Federation, Novosibirsk, 630090

V. V. Postupaev

Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences

Email: V.V.Postupaev@inp.nsk.su
Russian Federation, Novosibirsk, 630090

A. F. Rovenskikh

Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences

Email: E.N.Sidorov@inp.nsk.su
Russian Federation, Novosibirsk, 630090

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