Simulations of intense heavy ion beams propagating through a gaseous fusion target chamber
Simulations of intense heavy ion beams propagating through a gaseous fusion target chamber
复制标题
强重离子束通过气体聚变靶室传播的模拟
DOI：
10.1063/1.1448831
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发表时间：
2002
影响因子：
2.2
通讯作者：
Simon S. Yu
中科院分区：
文献类型：
--
作者：
D. Welch;D. Rose;B. Oliver;T. Genoni;R. Clark;C. Olson;Simon S. Yu
在重离子惯性约束聚变（HIF）中，离子束通过反应堆室传输到靶几米。这个间隔距离减轻了目标爆炸对加速器的损害。对于高导磁率束流和毫米级靶，输运方法在很大程度上取决于腔室中离子电荷和电流中和的程度。随着射束与周围腔室环境相互作用并剥离到更高的电荷状态，这种中和变得越来越困难。几乎完全中和允许中和弹道传输（主线HIF传输方法），其中离子束以大约3厘米的半径进入腔室并聚焦到目标上。在备用箍缩传输方案中，光束首先在腔室外部聚焦，然后以小半径传播到目标。在几乎完全电荷中和的情况下，大的光束发散被粗糙的磁场所包含。
In heavy-ion inertial confinement fusion (HIF), an ion beam is transported several meters through the reactor chamber to the target. This standoff distance mitigates damage to the accelerator from the target explosion. For the high perveance beams and millimeter-scale targets under consideration, the transport method is largely determined by the degree of ion charge and current neutralization in the chamber. This neutralization becomes increasingly difficult as the beam interacts with the ambient chamber environment and strips to higher charge states. Nearly complete neutralization permits neutralized-ballistic transport (main-line HIF transport method), where the ion beam enters the chamber at roughly 3-cm radius and focuses onto the target. In the backup pinched-transport schemes, the beam is first focused outside the chamber before propagating at small radius to the target. With nearly complete charge neutralization, the large beam divergence is contained by a strong magnetic field resulting from rough...