Journal article
Prevention of core particle depletion in stellarators by turbulence
- Abstract:
- In reactor-relevant plasmas, neoclassical transport drives an outward particle flux in the core of large stellarators and predicts strongly hollow density profiles. However, this theoretical prediction is contradicted by experiments. In particular, in Wendelstein 7-X, the first large optimized stellarator, flat or weakly peaked density profiles are generally measured, indicating that neoclassical theory is not sufficient and that an inward contribution to the particle flux is missing in the core. In this Research Letter, it is shown that the turbulent contribution to the particle flux can explain the difference between experimental measurements and neoclassical predictions. The results of this Research Letter also prove that theoretical and numerical tools are approaching the level of maturity needed for the prediction of equilibrium density profiles in stellarator plasmas, which is a fundamental requirement for the design of operation scenarios of present devices and future reactors.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
Actions
Access Document
- Files:
-
-
(Preview, Version of record, pdf, 1.3MB, Terms of use)
-
- Publisher copy:
- 10.1103/PhysRevResearch.5.L022053
Authors
- Publisher:
- American Physical Society
- Journal:
- Physical Review Research More from this journal
- Volume:
- 5
- Issue:
- 2
- Article number:
- L022053
- Publication date:
- 2023-06-13
- Acceptance date:
- 2023-05-10
- DOI:
- EISSN:
-
2643-1564
- Language:
-
English
- Keywords:
- Pubs id:
-
1464904
- Local pid:
-
pubs:1464904
- Deposit date:
-
2023-08-21
Terms of use
- Copyright holder:
- Thienpondt et al
- Copyright date:
- 2023
- Rights statement:
- ©2023 the Author(s). Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
- Licence:
- CC Attribution (CC BY)
If you are the owner of this record, you can report an update to it here: Report update to this record