Ion-kinetic-energy measurements and energy balance in a Z-pinch plasma at stagnation

The ion-kinetic energy throughout K emission in a stagnating plasma was determined from the Doppler contribution to the shapes of optically thin lines. X-ray spectroscopy with a remarkably high spectral resolution, together with simultaneous imaging along the pinch, was employed. Over the emission p...

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Bibliographic Details
Published in:Physical review letters 2007-03, Vol.98 (11), p.115001-115001, Article 115001
Main Authors: Kroupp, E, Osin, D, Starobinets, A, Fisher, V, Bernshtam, V, Maron, Y, Uschmann, I, Förster, E, Fisher, A, Deeney, C
Format: Article
Language:English
Subjects:
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
ELECTRON DENSITY
ELECTRON EMISSION
ELECTRONS
ENERGY BALANCE
IONS
KINETIC ENERGY
LINEAR Z PINCH DEVICES
PLASMA
RESOLUTION
TIME DEPENDENCE
X-RAY SPECTROSCOPY
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Summary:The ion-kinetic energy throughout K emission in a stagnating plasma was determined from the Doppler contribution to the shapes of optically thin lines. X-ray spectroscopy with a remarkably high spectral resolution, together with simultaneous imaging along the pinch, was employed. Over the emission period, a drop of the ion-kinetic energy down to the electron thermal energy was seen. Axially resolved time-dependent electron-density measurements and absolute intensities of line and continuum allowed for investigating, for the first time, each segment of the pinch, the balance between the ion-kinetic energy at the stagnating plasma, and the total radiation emitted. Within the experimental uncertainties, the ion-kinetic energy is shown to account for the total radiation.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.98.115001