Study of soft X-ray emission from Z-pinches with a complex atomic composition
- Troitsk Institute for Innovation and Fusion Research (Russian Federation)
Results are presented from experimental studies of Z-pinches produced by implosion of aluminum and tungsten cylindrical wire arrays in the Angara-5-1 facility. The electron temperature T{sub e} and density n{sub e} of the high-temperature pinch plasma have been determined by analyzing line emission from multicharged ions. For the same mass and radius of the array and the same number of wires in it, the intensity of line emission of H- and He-like Al ions from an imploded Al + W wire array containing even a small amount of tungsten (7 wt %) is one order of magnitude lower than that from an Al array. As the W content increases, the total soft X-ray (SXR) yield increases, while the duration of the SXR pulse decreases. For the 30% W content in the array, the power and duration of the SXR pulse are nearly the same as those recorded during the implosion of a W array with the same linear mass and radius and the same number of wires. Results are also presented from experiments with nested wire arrays in which the outer and inner shells were made of Al and W wires, respectively. It is found that, in this case, the effect of tungsten on the line emission of aluminum is much weaker than that in experiments with arrays in which tungsten and aluminum wires were placed in the same shell, even if the mass of the inner (tungsten) shell was larger than that of the outer (aluminum) one. At the same time, the inner W shell plays a significant role in the implosion dynamics of a nested wire array, reducing the duration of the SXR pulse and increasing the SXR power.
- OSTI ID:
- 21443594
- Journal Information:
- Plasma Physics Reports, Vol. 36, Issue 3; Other Information: DOI: 10.1134/S1063780X10030013; Copyright (c) 2010 Pleiades Publishing, Ltd.; ISSN 1063-780X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALUMINIUM
ANGARA-5 DEVICE
ELECTRON DENSITY
ELECTRON TEMPERATURE
EMISSION
IMPLOSIONS
LONGITUDINAL PINCH
PLASMA
SOFT X RADIATION
TUNGSTEN
WIRES
ELECTROMAGNETIC RADIATION
ELEMENTS
ICF DEVICES
IONIZING RADIATIONS
METALS
PINCH EFFECT
RADIATIONS
REFRACTORY METALS
THERMONUCLEAR DEVICES
TRANSITION ELEMENTS
X RADIATION