Ballooning stability optimization of low-aspect-ratio stellarators*Ballooning stability optimization
Ballooning stability optimization of low-aspect-ratio stellarators*Ballooning stability optimization
复制标题
低展弦比仿星器的气球稳定性优化*气球稳定性优化
DOI：
10.1088/0741-3335/42/6/303
复制
发表时间：
2000
期刊：
影响因子：
--
通讯作者：
D. Spong
中科院分区：
文献类型：
--
作者：
R. Sánchez;S. P. Hirshman;A. Ware;L. Berry;D. Spong
The implementation of ideal ballooning stability within an optimization code is used to determine stable, moderate-β compact stellarator configurations. Due to the large computational requirements of existing ballooning codes, such calculations within the optimization process were previously impractical. The recently developed COBRA code can efficiently compute ideal ballooning growth rates on various magnetic surfaces, using the VMEC code to supply equilibrium data. The optimization code has been used to minimize these growth rates, giving rise to new stellarator configurations at low aspect ratios with good ballooning stability properties, which also maintain previously determined desirable physics properties. This particular implementation is robust due to the enhanced convergence features included in COBRA, while incurring only a small overhead on the total computational time.
