Interferometric measurement of physical phenomena during the implosion phase of a puff-on-puff Z-pinch load on Double-EAGLE
Interferometric measurement of physical phenomena during the implosion phase of a puff-on-puff Z-pinch load on Double-EAGLE
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DOI：
10.1109/tps.2003.821582
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发表时间：
2003-12
影响因子：
1.5
通讯作者：
R. Hazelton;E. Yadlowsky;J. Moschella;E. Carlson;C. Vidoli;J. Niemel;B. Failor;P. Coleman;J. Levine;Yuanxu Song;H. Sze;J. Thornhill
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文献类型：
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作者：
R. Hazelton;E. Yadlowsky;J. Moschella;E. Carlson;C. Vidoli;J. Niemel;B. Failor;P. Coleman;J. Levine;Yuanxu Song;H. Sze;J. Thornhill
理论研究预测，如果使用均匀填充或多个环形壳体载荷，则瑞利-泰勒（R-T）不稳定性对环形z箍载荷电流传导和内爆特性的破坏作用将被质量吸积所减轻。采用全息干涉法研究了太瓦加速器内爆阶段的物理过程。同时观察到轴向（r-z）密度扰动和方位（r-/spl θ /）成丝模式。在阳极栅极下，在外部气体喷射器内爆到这个径向位置之前，观察到内部气体喷射器原子的显著电离（Z/spl ap/3-10）。辐射流体动力学计算表明，由外部载流壳的辐射产生的光电离不能解释这种电离。内部气体泡芙上流动的电流可能是这种电离的来源。这些物理过程对z-箝位辐射产率的影响值得进一步研究。
Theoretical studies have predicted that the disruptive role of the Rayleigh-Taylor (R-T) instability on the current conduction and implosion characteristics of annular Z-pinch loads will be mitigated by mass accretion if uniform fill or multiple annular shell loads are used. Holographic interferometry was used to study these physical processes during the implosion phase of puff-on-puff loads on a terawatt accelerator. Both axial (r-z) density perturbation and azimuthal (r-/spl theta/) filamentation modes of the R-T instability were observed. Significant ionization (Z/spl ap/3-10) of the inner gas puff atoms was observed below the anode grid before the outer puff had imploded to this radial position. Radiation hydrodynamic calculations indicate that photoionization by radiation from the outer current carrying shell could not account for this ionization. Current flowing on the inner gas puff could be the source of this ionization. The effect of these physical processes on the radiation yield from z-pinches warrants further investigation.