Characterization of a Liner-on-Target Gas Injector for Staged Z-Pinch Experiments
| Autor: | Jeff Narkis, E. Ruskov, Frank Wessel, Nicholas Aybar, M. P. Ross, F. Conti, H. U. Rahman, J. C. Valenzuela, Farhat Beg |
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| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | IEEE Transactions on Plasma Science. 46:3855-3863 |
| ISSN: | 1939-9375 0093-3813 |
| DOI: | 10.1109/tps.2018.2856748 |
| Popis: | The staged Z-pinch (SZP) is a magnetoinertial fusion scheme, where a high-Z gas liner implodes onto a deuterium gas target. An accurate measurement of the initial mass distribution, both in the liner and target, is crucial to achieve the fusion-relevant conditions. This paper presents the characterization of a double-valve injector for the SZP experiment, performed on a test stand with interferometric and visible emission diagnostics. The injector produces an annular liner gas profile that is peaked at $R_{L} = 1.25$ cm, has an average full width at half-maximum $\Delta r_{L} = 0.50$ cm, and a mass density $\rho _{L} = 0.5$ – $140~\mu \text{g}$ /cm3, which is adjusted by selecting the gas species between Ar and Kr, plenum pressure, and injection timing. The target gas density is centered on the axis, has a width $\Delta r_{T} = 0.80$ cm, and a density $\rho _{T} = 0.3$ –30 $\mu \text{g}$ /cm3. The molecular deuterium can be partially ionized and accelerated out of the injector with a velocity $v_{z} > 2$ cm/ $\mu \text{s}$ by a coaxial plasma gun built into the injector. |
| Databáze: | OpenAIRE |
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