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Optical Thomson scattering measurements of plasma parameters in the ablation stage of wire array Z pinches.

Authors
Type
Published Article
Journal
Physical Review Letters
0031-9007
Publisher
American Physical Society
Publication Date
Volume
108
Issue
14
Pages
145002–145002
Identifiers
PMID: 22540799
Source
Medline

Abstract

A Thomson scattering diagnostic has been used to measure the parameters of cylindrical wire array Z pinch plasmas during the ablation phase. The scattering operates in the collective regime (α>1) allowing spatially localized measurements of the ion or electron plasma temperatures and of the plasma bulk velocity. The ablation flow is found to accelerate towards the axis reaching peak velocities of 1.2-1.3×10(7) cm/s in aluminium and ∼1×10(7) cm/s in tungsten arrays. Precursor ion temperature measurements made shortly after formation are found to correspond to the kinetic energy of the converging ablation flow.

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