Studies of Pulsed Plasma-Ion Streams During Their Free Propagation And Interaction With Carbon-Tungsten Targets In PF-1000 Facility

Journal Article · Wed Mar 19 04:00:00 EDT 2008 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2909151· OSTI ID:21136946

Skladnik-Sadowska, E; Malinowski, K ^[1]; Marchenko, A ^[2]; Sadowski, M J ^[1]; Scholz, M; Karpinski, L; Paduch, M; Zielinska, B ^[3]; Gribkov, V A ^[3]

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1. The Andrzej Soltan Institute for Nuclear Studies, 05-400 Otwock-Swierk (Poland)
2. Institute of Plasma Physics, KIPT, 61-108 Kharkov (Ukraine)
3. Institute of Plasma Physics and Microfusion, Hery 23, 01-497 Warsaw (Poland)

The paper presents results of recent experimental studies within the PF-1000 plasma-focus facility [1], which were performed during the free propagation of pulsed plasma-ion streams inside the vacuum chamber, and during their interaction with different targets. Optical spectra were recorder by means of a Mechelle registered 900 spectrometer operated with some delays in relation to the discharge current peculiarity (dip) and with exposition varied from 100 ns to 100 {mu}s. The recorded spectral lines were used to estimate the density of the free-propagating plasma stream. The electron concentration, as estimated from the Stark broadening of the D{sub {beta}} line recorded at a distance of z = 30 cm from the electrode ends, changed from about 4x10{sup 17} cm{sup -3} to 2x10{sup 16} cm{sup -3} in about 30 {mu}s. Analogous spectroscopic measurements were carried out in experiments performed with targets made of carbon and sintered tungsten, which were placed at a distance of 15 cm from the electrode outlet, where q = 10{sup 10} W/cm{sup 2}, and at a distance of 30 cm, where q = 10{sup 9} W/cm{sup 2}. Particular attention was paid to investigation of a plasma layer formed in the front of the target. In that case the electron density, as estimated on the basis of carbon-and deuterium-ion lines, changed from about 3x10{sup 18} cm{sup -3} to 3x10{sup 16} cm{sup -3} in 30 {mu}s. For the target made of the sintered tungsten, which was placed at a distance of 30 cm, the recorded optical spectr a showed intense D{sub {alpha}} and D{sub {beta}} lines as well as CII-CIV lines, which covered tungsten (WI and WII) lines.

• OSTI ID: 21136946
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 993; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ABSORPTION SPECTROSCOPY
BEAM-PLASMA SYSTEMS
CARBON
DEUTERIUM IONS
ELECTRIC DISCHARGES
ELECTRODES
ELECTRON DENSITY
ELECTRONS
LAYERS
PF-1000 DEVICE
PLASMA
PLASMA DIAGNOSTICS
PLASMA FOCUS
TUNGSTEN