Stochastic and a posteriori optimization to mitigate coil manufacturing errors in stellarator design

Stochastic and a posteriori optimization to mitigate coil manufacturing errors in stellarator design
复制标题

随机和后验优化可减少仿星器设计中的线圈制造误差

DOI:
10.1088/1361-6587/ac89ee
复制
发表时间:
2022
影响因子:
2.2
通讯作者:
Stadler, Georg
Stadler, Georg
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Wechsung, Florian;Giuliani, Andrew;Landreman, Matt;Cerfon, Antoine;Stadler, Georg

文献摘要

参考文献

被引文献

相似文献

它最近在Wechsung等人(2022 Proc. Natl Acad. Sci. USA 119 e2202084119),存在产生磁场的电磁线圈,其是准对称场的极好近似并且具有非常好的粒子约束性质。使用高斯过程为基础的线圈扰动模型,我们调查这些线圈的性能上的制造误差的影响。我们发现,即使是相当小的错误,导致显着的性能下降。虽然随机优化产生微小的改进,但不可能显著减轻这些错误。作为一种替代随机优化,然后,我们制定了一个新的优化问题,用于计算线圈的位置和电流的最佳调整,而不改变线圈的形状。这些后验调整能够将线圈误差的影响降低一个数量级,为仿星器设计中处理制造公差提供了新的视角。
It was recently shown in Wechsung et al (2022 Proc. Natl Acad. Sci. USA 119 e2202084119) that there exist electromagnetic coils that generate magnetic fields, which are excellent approximations to quasi-symmetric fields and have very good particle confinement properties. Using a Gaussian process-based model for coil perturbations, we investigate the impact of manufacturing errors on the performance of these coils. We show that even fairly small errors result in noticeable performance degradation. While stochastic optimization yields minor improvements, it is not possible to mitigate these errors significantly. As an alternative to stochastic optimization, we then formulate a new optimization problem for computing optimal adjustments of the coil positions and currents without changing the shapes of the coil. These a-posteriori adjustments are able to reduce the impact of coil errors by an order of magnitude, providing a new perspective for dealing with manufacturing tolerances in stellarator design.
仿星器线圈优化以实现更高的工程公差
DOI: --
发表时间: 2018
期刊: Nuclear Fusion
影响因子: 3.3
作者:
J. Lobsien;M. Drevlak;T. Sunn Pedersen
通讯作者: T. Sunn Pedersen
基于梯度的单级仿星器线圈设计:近轴准对称优化
DOI: --
发表时间: 2020
影响因子: 4.1
作者:
Andrew Giuliani;F. Wechsung;A. Cerfon;G. Stadler;M. Landreman
通讯作者: M. Landreman
DOI: --
发表时间: 2004
期刊:
影响因子: --
作者:
T. Andreeva;T. Bräuer;M. Endler;J. Kisslinger;Y. Igitkhanov
通讯作者: Y. Igitkhanov
DOI: 10.1017/s002237782200023x
发表时间: 2021
影响因子: 2.5
作者:
Silke Glas;Misha Padidar;Ariel E. Kellison;D. Bindel
通讯作者: D. Bindel
仿星器线圈设计优化的改进性能
DOI: --
发表时间: 2020
影响因子: 2.5
作者:
J. Lobsien;M. Drevlak;T. Kruger;S. Lazerson;Caoxiang Zhu;T. Pedersen
通讯作者: T. Pedersen