初始印记效应对等离子体不稳定性动态抑制的影响
Initial imprint effect on dynamic mitigation of plasma instability
AI总结：
本研究聚焦等离子体不稳定性动态抑制中的初始印记效应，验证了脉冲整形可降低该效应，完善了基于相位控制的等离子体不稳定性抑制方法。
摘要：
我们提出了一种基于相位控制的等离子体不稳定性动态抑制方法，用于抑制等离子体不稳定性并平滑等离子体的非均匀性[例如Phys. Plasmas, 19(2012)024503]。在等离子体中，扰动相位通常是未知的，且学界已对不稳定性增长率展开了讨论。但如果扰动是由输入能量驱动束的照明非均匀性等因素引入的，那么扰动相位将由驱动源的照明非均匀性本身决定。当通过轴振荡或摆动运动控制驱动轴时，扰动相位将是已知且可控的。通过叠加不断增长的相位受控扰动，等离子体不稳定性的整体增长可得到抑制。这种动态抑制方法可有效抑制多种等离子体不稳定性的增长。同时研究发现，被抑制的增长扰动的相位仍由初始印记决定。本文聚焦于等离子体动态抑制机制中的初始印记效应。研究结果表明，振荡或摆动扰动的脉冲整形可降低初始印记效应。
英文摘要：
We proposed a dynamic mitigation method for plasma instabilities based on a phase control to mitigate plasma instabilities and to smooth plasma non-uniformities [e.g. Phys. Plasmas, 19(2012)024503]. In plasmas, perturbation phase would be unknown in general, and instability growth rate is discussed. However, if the perturbation is introduced by, for example, an illumination non-uniformity of an input energy driver beam, the perturbation phase would be defined by the driver illumination non-uniformity itself. When the driver axis is controlled by its axis oscillation or wobbling motion, the perturbation phase would be known and controlled. By the superimposition of the growing phase-controlled perturbations, the overall plasma instability growth is mitigated. The dynamic mitigation method is effective to mitigate growths of various plasma instabilities. At the same time, it was found that the phase of the growing perturbations mitigated would be still defined by the initial imprint. In this paper, the initial imprint effect is focused on the dynamic mitigation mechanism in plasmas. The results in this paper demonstrate that the initial imprint effect is reduced by a pulse shaping of the oscillating or wobbling perturbation.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
