Role of reynolds stress-induced poloidal flow in triggering the transition to improved ohmic confinement on the HT-6M tokamak

作者: Y. H. Xu , C. X. Yu , J. R. Luo , J. S. Mao , B. H. Liu

DOI: 10.1103/PHYSREVLETT.84.3867

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摘要: Time and space resolved measurements of electrostatic Reynolds stress, radial electric field E(r), plasma rotations have been performed across the transition to improved Ohmic confinement in Hefei Tokamak-6M (HT-6M). The first experimental evidence correlation between enhanced stress gradient poloidal flow acceleration edge is presented. results indicate that turbulence-induced might be dominant mechanism create sheared which may further trigger transition.

参考文章(23)
K. H. Burrell, PLASMA PHYSICS:Turbulence and Sheared Flow Science. ,vol. 281, pp. 1816- 1817 ,(1998) , 10.1126/SCIENCE.281.5384.1816
E J Synakowski, Formation and structure of internal and edge transport barriers Plasma Physics and Controlled Fusion. ,vol. 40, pp. 581- 596 ,(1998) , 10.1088/0741-3335/40/5/006
Zhihong Lin, Taik Soo Hahm, WW Lee, William M Tang, Roscoe B White, Turbulent Transport Reduction by Zonal Flows: Massively Parallel Simulations Science. ,vol. 281, pp. 1835- 1837 ,(1998) , 10.1126/SCIENCE.281.5384.1835
F. Wagner, G. Becker, K. Behringer, D. Campbell, A. Eberhagen, W. Engelhardt, G. Fussmann, O. Gehre, J. Gernhardt, G. v. Gierke, G. Haas, M. Huang, F. Karger, M. Keilhacker, O. Klüber, M. Kornherr, K. Lackner, G. Lisitano, G. G. Lister, H. M. Mayer, D. Meisel, E. R. Müller, H. Murmann, H. Niedermeyer, W. Poschenrieder, H. Rapp, H. Röhr, F. Schneider, G. Siller, E. Speth, A. Stäbler, K. H. Steuer, G. Venus, O. Vollmer, Z. Yü, Regime of Improved Confinement and High Beta in Neutral-Beam-Heated Divertor Discharges of the ASDEX Tokamak Physical Review Letters. ,vol. 49, pp. 1409- 1412 ,(1982) , 10.1103/PHYSREVLETT.49.1408
G. L. Jackson, J. Winter, T. S. Taylor, K. H. Burrell, J. C. DeBoo, C. M. Greenfield, R. J. Groebner, T. Hodapp, K. Holtrop, E. A. Lazarus, L. L. Lao, S. I. Lippmann, T. H. Osborne, T. W. Petrie, J. Phillips, R. James, D. P. Schissel, E. J. Strait, A. D. Turnbull, W. P. West, DIII-D Team, Regime of very high confinement in the boronized DIII-D tokamak. Physical Review Letters. ,vol. 67, pp. 3098- 3101 ,(1991) , 10.1103/PHYSREVLETT.67.3098
D. R. Ernst, M. G. Bell, R. E. Bell, C. E. Bush, Z. Chang, E. Fredrickson, L. R. Grisham, K. W. Hill, D. L. Jassby, D. K. Mansfield, D. C. McCune, H. K. Park, A. T. Ramsey, S. D. Scott, J. D. Strachan, E. J. Synakowski, G. Taylor, M. Thompson, R. M. Wieland, Notched velocity profiles and the radial electric field in high ion temperature plasmas in the Tokamak Fusion Test Reactor Physics of Plasmas. ,vol. 5, pp. 665- 681 ,(1998) , 10.1063/1.872771
D. R. Ernst, B. Coppi, S. D. Scott, M. Porkolab, TFTR Group, Unifying Role of Radial Electric Field Shear in the Confinement Trends of TFTR Supershot Plasmas Physical Review Letters. ,vol. 81, pp. 2454- 2457 ,(1998) , 10.1103/PHYSREVLETT.81.2454
F. M. Levinton, M. C. Zarnstorff, S. H. Batha, M. Bell, R. E. Bell, R. V. Budny, C. Bush, Z. Chang, E. Fredrickson, A. Janos, J. Manickam, A. Ramsey, S. A. Sabbagh, G. L. Schmidt, E. J. Synakowski, G. Taylor, Improved confinement with reversed magnetic shear in TFTR. Physical Review Letters. ,vol. 75, pp. 4417- 4420 ,(1995) , 10.1103/PHYSREVLETT.75.4417
E. J. Strait, L. L. Lao, M. E. Mauel, B. W. Rice, T. S. Taylor, K. H. Burrell, M. S. Chu, E. A. Lazarus, T. H. Osborne, S. J. Thompson, A. D. Turnbull, Enhanced confinement and stability in DIII-D discharges with reversed magnetic shear. Physical Review Letters. ,vol. 75, pp. 4421- 4424 ,(1995) , 10.1103/PHYSREVLETT.75.4421