The Research of EAST Pedestal Structure and Preliminary Application

WANG Tengfei (王腾飞); ZANG Qing (臧庆); HAN Xiaofeng (韩效锋); XIAO Shumei (肖树妹); HU Ailan (胡爱兰); ZHAO Junyu (赵君煜)

doi:10.1088/1009-0630/18/10/01

Plasma Science and Technology > 2016 > 18(10): 967-973. > DOI: 10.1088/1009-0630/18/10/01

WANG Tengfei (王腾飞), ZANG Qing (臧庆), HAN Xiaofeng (韩效锋), XIAO Shumei (肖树妹), HU Ailan (胡爱兰), ZHAO Junyu (赵君煜). The Research of EAST Pedestal Structure and Preliminary Application[J]. Plasma Science and Technology, 2016, 18(10): 967-973. DOI: 10.1088/1009-0630/18/10/01

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The Research of EAST Pedestal Structure and Preliminary Application

Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China

Funds: supported by National Natural Science Foundation of China (Nos. 11275233 and 11405206), and the National Magnetic Confinement Fusion Science Program of China (No. 2013GB112003), and Science Foundation of Institute of Plasma Physics, Chinese Academy of Sciences (No. DSJJ-15-JC01)

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Received Date: October 21, 2015

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Abstract

Abstract

The pedestal characteristic is an important basis for high confinement mode (H¬mode) research. Because of the finite spatial resolution of Thomson scattering (TS) diagnostic on Experimental Advanced Superconducting Tokamak (EAST), it is necessary to characterize the pedestal with a suitable functional form. Based on simulated and experimental data of EAST, it is shown that the two-line method with a bilinear fitting has better reproducibility of pedestal parameters than hyperbolic tangent (tanh) and modified hyperbolic tangent (mtanh) methods. This method has been applied to EAST type I edge localized mode (ELM) discharges, and the electron pedestal density is found to be proportional to the line-averaged density and the edge pressure gradient is found to be proportional to the pedestal pressure. Furthermore, the ion poloidal gyro-radius has been identified as the suitable parameter to describe the pedestal pressure width.
- two-line method,
- Thomson scattering,
- pedestal characteristic,
- pedestal models,
- EAST

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References

1 Wagner F, Becker G, Behringer K, et al. 1982, Phys.Rev. Lett., 49: 1408 2 Zang Q, Zhao J Y, Yang L, et al. 2010, Plasma Science and Technology, 12: 144 3 Yang L, Wan B N, Zhao J Y, et al. 2010, Plasma Science and Technology, 12: 284 4 Han X F, Shao C Q, Xi X Q, et al. 2013, Review of Scientific Instruments, 84: 053502 5 Chen H, Zhao J Y, Zang Q, et al. 2015, J. Fusion Energy, 34: 9 6 Groebner R J, Osborne T H. 1998, Physics of Plasmas,5: 1800 7 Osborne T H, Burrell K H, Groebner R J, et al. 1999,Journal of Nuclear Materials, 266–269: 131 8 Osborne T H, Ferron J R, Groebner R J, et al. 2000,Plasma Phys. Control. Fusion, 42: A175 9 Snyder P B, Wilson H R, Ferron J R, et al. 2002,Physics of Plasmas, 9: 2037 10 Schneider P A, Wolfrum E, Groebner R J, et al. 2012,Plasma Phys. Control. Fusion, 54: 105009 11 Cline A K. 1974, Commun. ACM, 17: 218 12 Zohm H. 1996, Plasma Phys. Control. Fusion, 38: 105 13 Burrell K H. 1997, Physics of Plasmas, 4: 1499 14 Snyder P B, Groebner R J, Leonard A W, et al. 2009,Physics of Plasmas, 16: 056118 15 Snyder P B, Osborne T H, Burrell K H, et al. 2012,Physics of Plasmas, 19: 056115 16 Onjun T, Bateman G, Kritz A H, et al. 2002, Physics of Plasmas, 9: 5018 17 Shaing K C. 1992, Phys. Fluids B, 4: 290

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