摘要：
EAST等离子体高约束模运行条件下,在等离子体边缘区域观测到明显的等离子体电流带.在EAST托卡马克装置非圆截面平衡位形下,使用射线追踪方法研究低混杂波高平行折射率N_‖分量对电流驱动的影响.结果表明:当-8 ≤ N_‖≤ -6时,平行折射率分量能够在小半径(0.7 < r / a < 1)区域驱动kA量级的等离子体电流.对于具有台基区、等离子体边缘温度更高的电子温度剖面,驱动电流的位置r / a > 0.9.低混杂波朗道阻尼的理论分析与数值模拟结果一致.另外,高N_‖低混杂波在等离子体边缘的功率沉积和电流驱动与电子温度分布和发射谱分布相关.
作者机构：
[Gong, Xueyu; He, Liang; Yang, Jin; Lu, Xingqiang; Wang, Xunyu] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Bin, Bin; Li, Yingying; Wan, Shunkuan; Chen, Jun; Fu, Jia; Wang, Fudi; Hao, Baolong; He, Liang; Wan, Baonian; Lyu, Bo; Zhang, Hongming; Yang, Jin; Li, Yichao; Wang, Xunyu] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China.;[Solomon, W. M.] Gen Atom, San Diego, CA 92186 USA.;[Chen, Jun; Ye, Minyou] Univ Sci & Technol China, Dept Engn & Appl Phys, Hefei 230026, Peoples R China.
通讯机构：
[Lu, Xingqiang] U;[Lyu, Bo] C;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China.
关键词：
intrinsic torque;balanced injection;momentum transport
摘要：
Direct measurements of the intrinsic torque profile in L-mode plasmas on the EAST tokamak have been performed using the balanced neutral beam injection. Co- and counter-current neutral beams are modulated to balance the intrinsic and externally injected torques, which result in the rotation profile close to zero and flat. The experimental results show that the intrinsic torque derived from momentum balance equations is found to be in the co-current direction, peaked in the plasma edge and negligibly small in the core.
作者机构：
[姜庆丰; 谢金森; Zeng, Wenjie; 陈乐至] School of Nuclear Science and Technology, University of South China, Hengyang;Hunan;421001, China;[姜庆丰; 谢金森; Zeng, Wenjie; 陈乐至] Hunan;[姜庆丰; 谢金森; Zeng, Wenjie; 陈乐至] 421001, China
作者：
Yang Jin;Chen Jun;Wang Fu-Di;Li Ying-Ping;Lyu Bo*;...
期刊：
物理学报,2020年69(5):126-132 ISSN：1000-3290
通讯作者：
Xiang Dong;Lyu Bo
作者机构：
[Yang Jin; Xiang Dong; Wang Xun-Yu; Gong Xue-Yu; He Liang] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Fu Jia; Yang Jin; Lyu Bo; Chu Yu-Qi; Zang Qing; Bin Bin; Liu Hai-Qing; Wang Fu-Di; Zhang Hong-Ming; Wang Xun-Yu; Wan Shun-Kuan; Li Ying-Ping; He Liang; Chen Jun; Liu Jian-Wen] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China.;[Ye Min-You; Chen Jun] Univ Sci & Technol China, Dept Engn & Appl Phys, Hefei 230026, Peoples R China.;[Yin Xiang-Hui] Univ South China, Sch Elect Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Xiang Dong] U;[Lyu Bo] C;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China.
作者机构：
[杨威; 刘明正; 谷增杰; 张天平; 郭宁] National Key Laboratory of Science and Technology on Vacuum Technology & Physics, Lanzhou Institute of Physics, Lanzhou, 730000, China;College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, 410073, China;School of Nuclear Science and Technology, University of South China, Hengyang, 421001, China;[龙建飞] College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, 410073, China, School of Nuclear Science and Technology, University of South China, Hengyang, 421001, China
通讯机构：
[Long, J.] C;College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, China
作者机构：
[黄浩; 谢芹; 于涛; 谢金森; 陈珍平; 侯丞; 苏适] School of Nuclear Science and Technology, University of South China, Hengyang;Hunan;421001, China;Hunan Engineering and Technology Research Center for Virtual Nuclear Reactor, Hengyang;[黄浩; 谢芹; 于涛; 谢金森; 陈珍平; 侯丞; 苏适] Hunan
作者机构：
[陈帅; 张力; 陈潮] College of Nuclear Science and Technology, University of South China, Hengyang;Hunan;421001, China;[青涛] Institute of Human Factor Engineering and Safety Management, Hunan Institute of Technology, Hengyang;421002, China
摘要：
To understand the physical and chemical characteristics, particle size distribution and sources of size-separated aerosols in Lhasa, which is located on the Tibetan Plateau (TP), six sizes of aerosol samples were collected in Lhasa in 2014. Ca(2+), NH4(+), NO3(-), SO4(2-) and Cl(-) were the dominant ions. The ratio of cation equivalents (CE) to anion equivalents (AE) for each particle size segment indicated that the atmospheric aerosols in Lhasa were alkaline. SO4(2-) and NO3(-) could be neutralized by Ca(2+), but could not be neutralized by NH4(+), according to the [NH4(+)]/[NO3(-)+SO4(2-)] and [Ca(2+)]/[NO3(-)+SO4(2-)] ratios. Mobile sources were dominant in PM0.95-1.5, PM1.5-3 and PM3-7.2, while stationary sources were dominant in the other three size fractions according to the [NO3(-)]/[SO4(2-)] ratios. The particle size distribution of all water-soluble ions during monsoon and non-monsoon periods was characterized by a bimodal distribution due to the different sources and formation mechanisms, and it was revealed that different ions had different sources in different seasons and different particle size segments by combining particle size distribution with correlation analysis. Source analysis of aerosols in Lhasa was performed using the Principal component analysis (PCA) for the first time, which revealed that combustion sources, motor vehicle exhaust, photochemical reaction sources and various types of dust were the main sources of Lhasa aerosols. Furthermore, Lhasa's air quality was also affected by long-distance transmission, expressed as pollutants from South Asia and West Asia, which were transmitted to Lhasa according to backward trajectory analysis.
