Modeling Chamber Transport for Heavy-Ion Fusion
Modeling Chamber Transport for Heavy-Ion Fusion
复制标题
重离子聚变室传输建模
DOI：
10.13182/fst03-a283
复制
发表时间：
2002
影响因子：
0.9
通讯作者：
C. Olson
中科院分区：
文献类型：
--
作者：
W. Sharp;D. Callahan;M. Tabak;Simon S. Yu;P. Peterson;D. Welch;D. Rose;C. Olson
在一个典型的厚液体壁的情况下，重离子聚变（HIF），70和200之间的高电流束的入口管道接近靶室和传播~3米的目标。由于熔盐射流计划保护室壁，束流通过射流的蒸汽移动，束离子和背景气体之间的碰撞既剥离离子又吸收气体分子。来自预热靶的辐射导致进一步的束剥离和气体电离。由于这种剥离，预期用于HIF的射束需要在靶室中基本上中和。因此，最近的研究主要集中在早期模拟中忽略的电子源的束中和，包括壁和靶的发射，靶辐射的光电离，以及沿着束路径产生的等离子体的预中和。当这些效应包括在具有实际束和腔室参数的模拟中时，所得到的焦斑大约是分布式辐射器目标所需的尺寸。
In a typical thick-liquid-wall scenario for heavy-ion fusion (HIF), between 70 and 200 high-current beams approach the target chamber in entry pipes and propagate ~3 m to the target. Since molten-salt jets are planned to protect the chamber wall, the beams move through vapor from the jets, and collisions between beam ions and this background gas both strip the ions and ionize the gas molecules. Radiation from the preheated target causes further beam stripping and gas ionization. Because of this stripping, beams for HIF are expected to require substantial neutralization in a target chamber. Much recent research has, therefore, focused on beam neutralization by electron sources that were neglected in earlier simulations, including emission from walls and the target, photoionization by the target radiation, and preneutralization by a plasma generated along the beam path. When these effects are included in simulations with practicable beam and chamber parameters, the resulting focal spot is approximately the size required by a distributed radiator target.