Krauz V.I.,RAS Research Center Kurchatov Institute |
Vojtenko D.A.,SUE Sukhum Physical Technical Institute SFTI |
Mitrofanov K.N.,Troitsk Institute for Innovation and Fusion Research |
Myalton V.V.,RAS Research Center Kurchatov Institute |
And 4 more authors.
Problems of Atomic Science and Technology, Series Thermonuclear Fusion | Year: 2015
The plasma flows generated in the plasma focus discharge are widely used in various practical applications - from materials modification to simulations of astrophysical jets. The main objective of this work was the comparative analysis of the plasma flows parameters and their propagation in background plasma, depending on the geometry of the discharge system. The experiments were performed on two the world's largest plasma focus facilities: PF-3 (NRC Kurchatov Institute, Moscow, Russia) and KPF-4 Phoenix (SUE SFTI, Sukhum, Republic of Abkhazia). The studies of the plasma flows propagation to a considerable distance (~100 cm) in different gases were done. It is shown that, regardless of the discharge system configuration, flow velocity weakly depends on the type of the gas used. The deceleration of the jets at their propagation in the drift space due to the interaction with the background plasma was analyzed. The distribution of the captured mag-netic field was investigated using multicomponent magnetic probes. The non-monotony of magnetic field signals and, in some cases, their sign-variable character shows the complex structure of the plasma flow, consisting of several plasma formations with the captured magnetic field. Source