Generation of compact plasma objects in plasma focus discharge

¹ National Research Centre Kurchatov Institute - Akademika Kurchatova pl., 1, 123182 Moscow, Russia
² Institute of Plasma Physics and Laser Microfusion - Hery street 23, 01-497 Warsaw, Poland
³ ACS Ltd - Hery street 23, 01-497 Warsaw, Poland
⁴ Troitsk Institute for Innovation and Fusion Research - Pushkovyh street, 12, 108840 Moscow, Troitsk, Russia

^(a) krauz_vi@nrcki.ru

Received: 12 September 2019
Accepted: 21 January 2020

Abstract

This paper provides the results of studies of plasma flows generated in the plasma focus facility PF-1000U. Regimes are found, involving the formation of compact plasma objects propagating in the variable-density background environment to the distances exceeding the initial crosswise dimensions of these objects by dozens of times. It is shown that the flow spreads with its proper captured toroidal magnetic field. The plasma flow front structure is studied. The conclusions about the role of radiation cooling and magnetic confinement in the collimation and stability of outflows are drawn. The results obtained in this work can be used to analyze the existing and build new models describing the collimation and stability of non-relativistic outflows of young stellar objects.