Piecewise omnigenous stellarators with zero bootstrap current
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866911094203744256 |
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| author | Calvo, Ivan Velasco, Jose Luis Helander, Per Parra, Felix I. |
| author_facet | Calvo, Ivan Velasco, Jose Luis Helander, Per Parra, Felix I. |
| contents | Until now, quasi-isodynamic magnetic fields have been the only known stellarator configurations that, at low collisionality, give small radial neoclassical transport and zero bootstrap current for arbitrary plasma profiles, the latter facilitating control of the magnetic configuration. The recently introduced notion of piecewise omnigenous fields has enormously broadened the space of stellarator configurations with small radial neoclassical transport. In this Letter, the existence of piecewise omnigenous fields that give zero bootstrap current is proven analytically and confirmed numerically. These results establish piecewise omnigenity as an alternative approach to stellarator reactor design. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_02546 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Piecewise omnigenous stellarators with zero bootstrap current Calvo, Ivan Velasco, Jose Luis Helander, Per Parra, Felix I. Plasma Physics Until now, quasi-isodynamic magnetic fields have been the only known stellarator configurations that, at low collisionality, give small radial neoclassical transport and zero bootstrap current for arbitrary plasma profiles, the latter facilitating control of the magnetic configuration. The recently introduced notion of piecewise omnigenous fields has enormously broadened the space of stellarator configurations with small radial neoclassical transport. In this Letter, the existence of piecewise omnigenous fields that give zero bootstrap current is proven analytically and confirmed numerically. These results establish piecewise omnigenity as an alternative approach to stellarator reactor design. |
| title | Piecewise omnigenous stellarators with zero bootstrap current |
| topic | Plasma Physics |
| url | https://arxiv.org/abs/2505.02546 |