Plasma dynamics in a composite gas-embedded Z-pinch discharge
Conference
·
OSTI ID:449482
- CEN La Reina, Santiago (Chile)
- Pontificia Univ. Catolica de Chile, Santiago (Chile). Facultad de Fisica
- Imperial Coll., London (United Kingdom). Blackett Lab.
A composite gas embedded Z-pinch discharge is studied. In this discharge an axial current filament as well as a coaxial cylindrical current shell are used. The dynamics of this composite compressional gas-embedded Z-pinch are presented. Visible streak camera, fast current measurements and holographic shadowgraphy and interferometry have been used. An initial 10 ns fast expansion phase is observed, followed by about 50 ns with an expansion of the central channel of 2 x 10{sup 4} m/s, an expansion of the internal wall of the annular plasma of the same order, whereas the external wall has a slower expanding velocity of 6 x 10{sup 3} m/s. A direct comparison with either a laser initiated gas embedded Z-pinch (single axial current channel), or annular initial microdischarge only does produce a significantly different behavior. Results obtained with the present configuration suggest that by controlling the initial preionization conditions it might be possible to improve the stability properties of a gas embedded Z-pinch.
- OSTI ID:
- 449482
- Report Number(s):
- CONF-960634--
- Country of Publication:
- United States
- Language:
- English
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