Quasisymmetry
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Quasisymmetric (quasihelically symmetric) plasma equilibria are non-axisymmetric configurations in which the magnetic field strength depends only on one angular coordinate within the magnetic flux surfaces. [1] This concept is part of the program of stellarator optimization (designing stellarators to have reduced transport, i.e., heat and particle losses). [2]
Types of quasisymmetry:
- Quasihelical (QH) symmetry, on which the design of the HSX stellarator (operational) is based.[3]
- Quasipoloidal (QP) symmetry, on which the design of the QPS stellarator (under construction) is based.[4]
- Quasi-axisymmetry (QA), on which the design of the NCSX stellarator was based[5]
See also
References
- ↑ D.A. Garren and A.H. Boozer, Existence of quasihelically symmetric stellarators, Phys. Fluids B 3 (1991) 2822
- ↑ Iván Calvo et al, Stellarators close to quasisymmetry, Plasma Phys. Control. Fusion 55 (2013) 125014
- ↑ J.N. Talmadge, F.S.B. Anderson, D.T. Anderson, C. Deng, W. Guttenfelder, K.M. Likin, J. Lore, J.C. Schmitt, K. Zhai, Experimental Tests of Quasisymmetry in HSX, Plasma and Fusion Research 3 (2008) S1002
- ↑ D.A. Spong, S.P. Hirshman, J.F. Lyon, L.A. Berry and D.J. Strickler, Recent advances in quasi-poloidal stellarator physics issues, Nucl. Fusion 45 (2005) 918
- ↑ M.Yu. Isaev et al, The pseudo-symmetric optimization of the National Compact Stellarator Experiment, Phys. Plasmas 6, 8 (1999) 3174