高频旋转离子束驱动圆柱内爆辐照不对称性的谐波分析
Harmonic analysis of irradiation asymmetry for cylindrical implosions driven by high-frequency rotating ion beams
摘要：
在不久的将来，强流重离子束驱动的圆柱形内爆将有助于研究高能量密度物质。通过高频摇摆器旋转光束，应该可以将能量沉积在圆柱体的外层，压缩沉积在其核心的材料。然而，光束的时间轮廓应该产生不可避免的照射不对称性，可能会在内爆阶段期间馈送瑞利-泰勒不稳定性（RTI）。在本文中，我们计算的目标辐射的傅立叶分量，以使与以前的RTI在此设置中进行的工作的交界处。实现一个1D和2D光束模型，我们发现这些组件可以精确地表示在时间光束轮廓的傅里叶变换。如果$T$是射束持续时间，$Ω$是其旋转频率，则可以识别“魔积”$ΩT$，其抵消沉积密度的第一谐波，导致改进的照射对称性。
英文摘要：
Cylindrical implosions driven by intense heavy ions beams should be instrumental in a near future to study High Energy Density Matter. By rotating the beam by means of a high frequency wobbler, it should be possible to deposit energy in the outer layers of a cylinder, compressing the material deposited in its core. The beam temporal profile should however generate an inevitable irradiation asymmetry likely to feed the Rayleigh-Taylor instability (RTI) during the implosion phase. In this paper, we compute the Fourier components of the target irradiation in order to make the junction with previous works on RTI performed in this setting. Implementing a 1D and 2D beam models, we find these components can be expressed exactly in terms of the Fourier transform of the temporal beam profile. If $T$ is the beam duration and $Ω$ its rotation frequency, "magic products" $ΩT$ can be identified which cancel the first harmonic of the deposited density, resulting in an improved irradiation symmetry.
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。
