skip to main content

Title: Observation of plasma jets in a table top plasma focus discharge

In the last years, medium size Z-pinch experiments operating at tens of kJ are being used to create supersonic plasma jets. Those experiments are produced with wire arrays and radial foils, and they are conducted in generators based on water-filled transmission lines. Also plasma jets have been observed in small X-pinch experiments operating at 1 kJ. In this work, observations of plasma jets produced in a table top plasma focus device by means of optical and digital interferometry are shown. The device was operated at only ∼70 J, achieving 50 kA in 150 ns. The plasma jets were observed after the pinch, in the region close and on the anode, along the axis. The electron density measured from the jets is in the range 10{sup 24}–10{sup 25 }m{sup −3}. From two consecutive plasma images separated 18 ns, the axial jet velocity was measured in the order of 4 × 10{sup 4 }m/s.
Authors:
;  [1] ;  [2] ;  [2] ;  [1] ;  [2] ;  [1] ;  [2]
  1. Comisión Chilena de Energía Nuclear, CCHEN, Casilla 188-D, Santiago (Chile)
  2. (Chile)
Publication Date:
OSTI Identifier:
22408284
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 4; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ANODES; ELECTRON DENSITY; FOILS; IMAGES; INTERFEROMETRY; PLASMA FOCUS; PLASMA FOCUS DEVICES; PLASMA JETS; VELOCITY; WATER; WIRES