Magnetic shear effects on plasma transport and turbulence at high electron to ion temperature ratio in DIII-D and JT-60U plasmas
作者: M. YoshidaG.R. McKeeM. MurakamiB.A. GriersonM. NakataE.M. DavisA. MarinoniM. OnoT.L. RhodesC. SungL. SchmitzC.C. PettyJ.R. FerronF. TurcoA.M. GarofaloC.T. HolcombC.M. CollinsW.M. Solomon
作者单位: 1National Institutes for Quantum and Radiological Science and Technology, Naka, Ibaraki 311-0193, Japan
2University of Wisconsin-Madison, 1500 Engineering Dr., Madison, WI 53706-1687, United States of America
3Oak Ridge National Laboratory, PO Box 2008, Oak Ridge, TN 37831, United States of America
4Princeton Plasma Physics Laboratory, PO Box 451, Princeton, NJ 08543-0451, United States of America
5National Institute for Fusion Sciences, Toki, Gifu 509-5292, Japan
6Massachusetts Institute of Technology, Cambridge, MA 02139, United States of America
7The Graduate University for Advanced Studies (SOKENDAI), Toki, Gifu 509-5292, Japan
8University of California Los Angeles, PO Box 957099, Los Angeles, CA 90095-7099, United States of America
9General Atomics, PO Box 85608, San Diego, CA 92186-5608, United States of America
10Columbia University, 116th and Broadway, New York, NY 10027, United States of America
11Lawrence Livermore National Laboratory, 7000 East Ave, Livermore, CA 94550, United States of America
刊名: Nuclear Fusion, 2017, Vol.57 (5)
来源数据库: Institute of Physics Journal
DOI: 10.1088/1741-4326/aa611e
原始语种摘要: Negative magnetic shear has been demonstrated in DIII-D and JT-60U to mitigate the confinement degradation typically observed with increasing the electron to ion temperature ratio ( T e/ T i). In recent experiments in DIII-D negative central magnetic shear (NCS) discharges, the thermal transport in the internal transport barrier formed around the radius of the minimum safety factor ( q min) remained almost constant and modestly increased in the region outside of q min compared to the positive shear (PS) case, when T e/ T i increased from about 0.8 to 1.1 through electron cyclotron heating (ECH). The benefit of NCS extending into the region outside of q min can be explained by the lower magnetic shear in the NCS...
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  • transport 输运
  • shear 切变
  • electron 电子
  • temperature 温度
  • observed 观察到的
  • region 地域
  • increased 增加
  • typically 典型地
  • demonstrated 探明的储量
  • fluctuation 起伏