Simulation of stellarator divertors
The nested magnetic surfaces that confine a fusion plasma can be developed to be bounded by a limiter or a divertor. For a limiter, confining surfaces extend until they intercept a part of the surrounding structure. For a divertor, an outermost confining magnetic surface exists, which is well separated from the surrounding structures. The only designs that are thought to be fusion relevant have divertors that direct field lines from the plasma edge into chambers where the particle exhaust can be pumped and the residual heat exhaust can be handled. The topological properties of magnetic field lines just outside the outermost confining surface determine much of the physics of divertors. Axisymmetric tokamak divertors are well-known, and the outermost confining surface is defined by a sharp separatrix. The topology of the magnetic field lines associated with a stellarator divertor is far more subtle. Related subtleties arise in tokamak divertors when subjected to sufficiently strong non-axisymmetric perturbations.Here, an efficient simulation method for carrying out topological studies of non-axisymmetric divertors is created and illustrative results are given.
- Research Organization:
- Hampton Univ., Hampton, VA (United States); Univ. of California, Oakland, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- Grant/Contract Number:
- FG02-01ER54624; FG02-04ER54793; AC02-05CH11231; FG02-95ER5433
- OSTI ID:
- 1540242
- Alternate ID(s):
- OSTI ID: 1471440
- Journal Information:
- Physics of Plasmas, Vol. 25, Issue 9; ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Simulation of non-resonant stellarator divertor
|
journal | January 2020 |
Direct measurements of counter-streaming flows in a low-shear stellarator magnetic island topology
|
journal | September 2019 |
| Simulation of non-resonant stellarator divertor | text | January 2021 |
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