Abstract
It has been shown that transport barriers in toroidal magnetically confined plasmas tend to be linked to regions of unique magnetic topology such as the location of a minimum in the safety factor, rational surfaces or the boundary between closed and open flux surfaces. In the absence ofE×B sheared flows, fluctuations are expected to show maximum amplitude near rational surfaces, and plasma confinement might tend to deteriorate. On the other hand, if the generation ofE×B sheared flows were linked to low order rational surfaces, these would be beneficial for confinement. Experimental evidence ofE×B sheared flows linked to rational surfaces has been obtained in the plasma edge region of the TJ-II stellarator.
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References
B.A. Carreras: IEEE Trans. Plasma Sci.25 (1997) 1281.
E. Sydnakowski: Plasma Phys. Control. Fusion40 (1998) 581.
P.W. Terry: Rev. Mod. Phys.72 (2000) 109.
K. Burrel: Phys. Plasmas4 (1997) 1499.
E.J. Strait, L.L. Lao, M.E. Mauel et al.: Phys. Rev. Lett.75 (1995) 4421.
F.M. Levinton, M.C. Zarnstorff, S.H. Batha et al.: Phys. Rev. Lett.75 (1995) 4417.
Y. Koide and the JT-60 team: Phys. Plasmas4 (1997) 1623.
N.J. Lopes Cardozo et al.: Plasma Phys. Control. Fusion39 (1997) B303.
F. Wagner et al.: Phys. Rev. Lett.49 (1982) 1408.
N. Ohyabu, K. Narihara et al.: Phys. Rev. Lett.84 (2000) 103.
P. Grigull, M. Hirsch et al.: inProc. 26th EPS Conf. on Contr. Fusion and Plasma Physics, ECA, Vol.23J (1999), p. 1473.
C. Hidalgo, M.A. Pedrosa et al.: Plasma Phys. Control. Fusion42 (2000) A153.
Ch.P. Ritz et al.: Phys. Rev. Letters65 (1990) 2543.
C. Alejaldre et al.: Plasma Phys. Control. Fusion41 (1999) A539.
E. Ascasíbar et al.: J. Plasma Fus. Res.1 (1998) 183.
M.A. Pedrosa et al.: Rev. Sci. Instruments70 (1999) 415.
C. Hidalgo, C. Silva, M.A. Pedrosa, E. Sánchez, H. Fernandes, C.A.F. Varandas: Phys. Rev. Letters83 (1999) 2203.
C. Hidalgo: Plasma Phys. Control. Fusion37 (1995) A53.
K.C. Shaing and E.C. Crume: Phys. Rev. Lett.63 (1989) 2369.
A.B. Hassam, T.M. Antonsen, J. Drake and S.C. Liu: Phys. Rev. Lett.66 (1991) 309.
F.L. Hinton and G.M. Staebler: Phys. Fluids B5 (1993) 1281.
P.H. Diamond and Y.B. Kim: Phys. Fluids B3 (1991) 1626.
B.A. Carreras, V.E. Lynch and L. García: Phys. Fluids B3 (1991) 1438.
C. Kessel et al.: Phys. Rev. Lett.72 (1994) 1212.
E. Synakowski: Phys. Plasmas4 (1994) 1736.
K.C. Shaing: Phys. Fluids B4 (1992) 171.
P.H. Diamond, Y.M. Liang, B.A. Carreras, P.W. Terry: Phys. Rev. Lett.72 (1994) 2565.
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Pedrosa, M.A., Hidalgo, C., López-Fraguas, A. et al. Role of rational surfaces on fluctuations and transport in the plasma edge of the TJ-II stellarator. Czech J Phys 50, 1463–1470 (2000). https://doi.org/10.1023/A:1022859915916
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DOI: https://doi.org/10.1023/A:1022859915916