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

Citation:

PDF (387 KB)

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)

More Information

Received Date: October 21, 2015

Graphical Abstract

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

FullText(HTML)

References (1)

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

[1]	Zhijun WANG (王智君), Xiang GAO (高翔), Tingfeng MING (明廷凤), Yumin WANG (王嵎民), Fan ZHOU (周凡), Feifei LONG (龙飞飞), Qing ZHUANG (庄清), EAST Team. Two-dimensional vacuum ultraviolet images in different MHD events on the EAST tokamak[J]. Plasma Science and Technology, 2018, 20(2): 25103-025103. DOI: 10.1088/2058-6272/aa9477
[2]	Hai XIE (谢海), Rui DING (丁锐), Junling CHEN (陈俊凌), Jizhong SUN (孙继忠). Modelling of carbon erosion and re-deposition for the EAST movable limiter[J]. Plasma Science and Technology, 2017, 19(4): 45603-045603. DOI: 10.1088/2058-6272/aa4ee0
[3]	CHEN Gen (陈根), QIN Chengming (秦成明), MAO Yuzhou (毛玉周), ZHAO Yanping (赵燕平), YUAN Shuai (袁帅), ZHANG Xinjun (张新军). Power Compensation for ICRF Heating in EAST[J]. Plasma Science and Technology, 2016, 18(8): 870-874. DOI: 10.1088/1009-0630/18/8/14
[4]	LU Xiaofei (陆小飞), FU Peng (傅鹏), ZHUANG Ming (庄明), QIU Lilong (邱立龙), HU Liangbing (胡良兵). Process Modeling and Dynamic Simulation for EAST Helium Refrigerator[J]. Plasma Science and Technology, 2016, 18(6): 693-698. DOI: 10.1088/1009-0630/18/6/18
[5]	LI Changzheng(李长征), HU Jiansheng(胡建生), CHEN Yue(陈跃), LIANG Yunfeng(梁云峰), LI Jiangang(李建刚), LI Jiahong(李加宏), WU Jinhua(吴金华), HAN Xiang(韩翔). First Results of Pellet Injection Experiments on EAST[J]. Plasma Science and Technology, 2014, 16(10): 913-918. DOI: 10.1088/1009-0630/16/10/03
[6]	WANG Fuqiong(王福琼), CHEN Yiping(陈一平), HU Liqun(胡立群). DIVIMP Modeling of Impurity Transport in EAST[J]. Plasma Science and Technology, 2014, 16(7): 642-649. DOI: 10.1088/1009-0630/16/7/03
[7]	ZHANG Shoubiao(张寿彪), GAO Xiang(高翔), LING Bili(凌必利), WANG Yumin(王嵎民), ZHANG Tao(张涛), HAN Xiang(韩翔), LIU Zixi(刘子奚), BU Jingliang(布景亮), LI Jiangang(李建刚), EAST team. Density Profile and Fluctuation Measurements by Microwave Reflectometry on EAST[J]. Plasma Science and Technology, 2014, 16(4): 311-315. DOI: 10.1088/1009-0630/16/4/02
[8]	GAO Xiang (高翔), ZHANG Tao (张涛), HAN Xiang (韩翔), ZHANG Shoubiao (张寿彪), et al.. Observation of Pedestal Plasma Turbulence on EAST Tokamak[J]. Plasma Science and Technology, 2013, 15(8): 732-737. DOI: 10.1088/1009-0630/15/8/03
[9]	JI Xiang (戢翔), SONG Yuntao (宋云涛), SHEN Guang (沈光), CAO Lei (曹磊), ZHOU Zibo (周自波), XU Tiejun (许铁军), LIU Xufeng (刘旭峰), XU Weiwei (徐薇薇), PENG Xuebing (彭学兵), WANG Shengming (王声铭), et al. Optimization and Update of EAST In-Vessel Components in 2011[J]. Plasma Science and Technology, 2013, 15(3): 277-281. DOI: 10.1088/1009-0630/15/3/17
[10]	YANG Fei (杨飞), XIAO Bingjia (肖炳甲). Web-based Logbook System for EAST Experiments[J]. Plasma Science and Technology, 2010, 12(5): 632-635.