准等动力恒星器磁轴的螺旋性

IF 2.1 3区 物理与天体物理 Q2 PHYSICS, FLUIDS & PLASMAS
Katia Camacho Mata, Gabriel G. Plunk
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引用次数: 0

摘要

在这项研究中,我们探讨了磁轴的螺旋度(定义为曲线的自链接数)对使用近轴扩展方法构建的准等动力学恒星器对称构型质量的影响(Plunk 等人,《等离子体物理学杂志》,第 85 卷,2019 年,905850602;Camacho Mata 等人,《等离子体物理学杂志》,第 88 卷,2022 年,905880503)。在分析 QIPC 构型的磁轴形状时,我们发现了这一形式主义中之前未曾探索过的一类磁轴(Subbotin 等人,《核聚变》,第 46 卷,2006 年,第 921 页):半螺旋(每个场周期)的情况。我们展示了这些形状与近轴形式主义的兼容性,以及如何用它们来构造具有多达五个场周期的近轴恒星器,$\def\iotaslash{{\require{HTML}.\style{display: inline-block; transform: rotate(-13deg)}{iota}}\kern-7pt{\require{HTML}\style{display: inline-block; transform: rotate(-25deg)}{-}}}{epsilon _{\mathrm {eff}}}\approx1.3\,\%$,以及与现有传统优化设计类似的旋转变换,而无需进行等离子体边界优化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Helicity of the magnetic axes of quasi-isodynamic stellarators

In this study, we explore the influence of the helicity of the magnetic axis – defined as the self-linking number of the curve – on the quality of quasi-isodynamic stellarator-symmetric configurations constructed using the near-axis expansion method (Plunk et al., J. Plasma Phys., vol. 85, 2019, 905850602; Camacho Mata et al., J. Plasma Phys., vol. 88, 2022, 905880503). A class of magnetic axes previously unexplored within this formalism is identified when analysing the axis shape of the QIPC configuration (Subbotin et al., Nucl. Fusion, vol. 46, 2006, p. 921): the case of half-helicity (per field period). We show that these shapes are compatible with the near-axis formalism and how they can be used to construct near-axis stellarators with up to five field periods, $\def\iotaslash{{\require{HTML} \style{display: inline-block; transform: rotate(-13deg)}{\iota}}\kern-7pt{\require{HTML} \style{display: inline-block; transform: rotate(-25deg)}{-}}}{\epsilon _{\mathrm {eff}}} \approx 1.3\,\%$, and similar rotational transform to existing conventionally optimized designs, without the need of a plasma boundary optimization.

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来源期刊
Journal of Plasma Physics
Journal of Plasma Physics 物理-物理:流体与等离子体
CiteScore
3.50
自引率
16.00%
发文量
106
审稿时长
6-12 weeks
期刊介绍: JPP aspires to be the intellectual home of those who think of plasma physics as a fundamental discipline. The journal focuses on publishing research on laboratory plasmas (including magnetically confined and inertial fusion plasmas), space physics and plasma astrophysics that takes advantage of the rapid ongoing progress in instrumentation and computing to advance fundamental understanding of multiscale plasma physics. The Journal welcomes submissions of analytical, numerical, observational and experimental work: both original research and tutorial- or review-style papers, as well as proposals for its Lecture Notes series.
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