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PreprintarXiv licencearXiv

On the Shafranov shift in stellarators

  • Per Helander
  • Nikita Nikulsin
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Abstract

As first shown by Shafranov, toroidal plasmas in magnetohydrodynamic equilibrium tend to expand in major radius when the pressure is increased. Here, an average measure of the resulting Shafranov shift is introduced, and its properties are discussed for various classes of stellarator configurations. It is shown to be particularly small in quasi-helical and quasi-isodynamic stellarators with a large number of field periods, which are thus relatively robust to variations in the plasma pressure.

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Cite

BibTeXRIS
BibTeX
@misc{helander2026shafranov,
  title = {{On the Shafranov shift in stellarators}},
  author = {Per Helander and Nikita Nikulsin},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2605.22105},
  eprint = {2605.22105},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2605.22105},
}
RIS
TY  - UNPB
TI  - On the Shafranov shift in stellarators
AU  - Per Helander
AU  - Nikita Nikulsin
PY  - 2026
DA  - 2026/10/13
PB  - arXiv
DO  - 10.48550/arxiv.2605.22105
UR  - https://arxiv.org/abs/2605.22105
AB  - As first shown by Shafranov, toroidal plasmas in magnetohydrodynamic equilibrium tend to expand in major radius when the pressure is increased. Here, an average measure of the resulting Shafranov shift is introduced, and its properties are discussed for various classes of stellarator configurations. It is shown to be particularly small in quasi-helical and quasi-isodynamic stellarators with a large number of field periods, which are thus relatively robust to variations in the plasma pressure.
ER  -