Bohm-like Neoclassical Transport in Highly Collisional Toroidal Plasmas with High Density Gradients
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866917569384939520 |
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| author | Xiao, Jianyuan Cai, Huishan Liu, Jian Yu, Zhi Zheng, Yifeng |
| author_facet | Xiao, Jianyuan Cai, Huishan Liu, Jian Yu, Zhi Zheng, Yifeng |
| contents | Conventional neoclassical theory in the Pfirsch-Schlüter regime fails to accurately model collision-induced transport in toroidal plasmas with high density gradients. In this scenario, we find that collision suppresses the return flow, leading to the dominance of the transport flux by the vacuum toroidal field drift with a reduced Bohm-like scaling. The new regime is also confirmed by full-orbit particle simulations, and can be employed to improve the accurate modeling of impurity transport in toroidal magnetized plasmas. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_08794 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Bohm-like Neoclassical Transport in Highly Collisional Toroidal Plasmas with High Density Gradients Xiao, Jianyuan Cai, Huishan Liu, Jian Yu, Zhi Zheng, Yifeng Plasma Physics Conventional neoclassical theory in the Pfirsch-Schlüter regime fails to accurately model collision-induced transport in toroidal plasmas with high density gradients. In this scenario, we find that collision suppresses the return flow, leading to the dominance of the transport flux by the vacuum toroidal field drift with a reduced Bohm-like scaling. The new regime is also confirmed by full-orbit particle simulations, and can be employed to improve the accurate modeling of impurity transport in toroidal magnetized plasmas. |
| title | Bohm-like Neoclassical Transport in Highly Collisional Toroidal Plasmas with High Density Gradients |
| topic | Plasma Physics |
| url | https://arxiv.org/abs/2401.08794 |