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Spectroscopic diagnosis of nested-wire-array dynamics and interpenetration at 7 MA
C Deeney1, J P Apruzese, C A Coverdale
1Sandia National Laboratories, P.O. Box 5800 Albuquerque, New Mexico 87185, USA.
Physical Review Letters
|November 5, 2004
Summary
Nested-wire array experiments show outer array material dominates the hot core of plasma pinches. This occurs regardless of the specific gap between wires, indicating a robust phenomenon in high-energy experiments.
Area of Science:
- Plasma Physics
- High Energy Density Physics
Background:
- Nested-wire arrays are used to create high-temperature plasmas.
- Understanding material distribution in stagnated pinches is crucial for fusion energy research.
Purpose of the Study:
- To investigate the material distribution within the core of stagnated pinches generated by nested-wire arrays.
- To determine the influence of interwire gap on core composition.
Main Methods:
- Conducted nested-wire array experiments at 7 MA current and 150 ns implosion time.
- Utilized spectral data analysis to identify material composition at the core.
Main Results:
- Material from the outer wire array was found to preferentially occupy the high-temperature core.
- This preferential occupation was observed consistently across varying interwire gaps (1.1 to 4.5 mm).
Conclusions:
- The outer array material plays a dominant role in forming the high-temperature core.
- Interwire gap size is not a critical factor for this core composition in the studied range.