Effect of magnetic geometry on the energy partition between ions and electrons in the scrape-off layer of magnetic fusion devices
- Forschungszentrum Juelich (Germany). Inst. for Energy and Climate Research (IEK); Chinese Academy of Sciences (CAS), Beijing (China); Univ. of York (United Kingdom); WEST Team Collaboration. et al.; W7-X Team Collaboration. et al.
A universal energy partition mechanism between ions and electrons has been confirmed to exist in the scrape-off layer of both the WEST tokamak and the W7-X stellarator. A peaked plasma density structure induced by an infinite magnetic connection length structure is observed to destroy this dependence and enhance the local ion and electron temperature ratio in the stellarator. Here, a theoretical analysis reveals that the ratio of ion and electron parallel heat conduction is predominant in determining this universality, while electrons would further be cooled in the density-peaked region.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Contributing Organization:
- WEST Team Collaboration, W7-X Team Collaboration
- Grant/Contract Number:
- AC52-07NA27344
- OSTI ID:
- 2246720
- Report Number(s):
- LLNL-JRNL-829311; 1045229
- Journal Information:
- Nuclear Fusion, Vol. 62, Issue 9; ISSN 0029-5515
- Publisher:
- IOP ScienceCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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