作者：
Du, Dan*;Xiang, Dong;Cao, Jin Jia;Yin, Lan;Zhong, Yi Jun;...
期刊：
Journal of the Physical Society of Japan,2019年88(5):054501 ISSN：0031-9015
通讯作者：
Du, Dan
作者机构：
[Yin, Lan; Du, Dan; Zhong, Yi Jun] Univ South China, Dept Math & Phys, Hengyang 421001, Peoples R China.;[Cao, Jin Jia; Gong, Xue Yu; Xiang, Dong] Univ South China, Dept Nucl Sci & Technol, Hengyang 421001, Peoples R China.
通讯机构：
[Du, Dan] U;Univ South China, Dept Math & Phys, Hengyang 421001, Peoples R China.
摘要：
Fast wave in the ion-cyclotron resonance frequency (ICRF) range is a promising candidate for non-inductive current drive (CD), which is essential for long pulse and high performance operation of tokamaks. A numerical study on the ICRF fast wave current drive (FWCD) and mode-conversion current drive (MCCD) in the Experimental Advanced Superconducting Tokamak (EAST) is carried out by means of the coupled full wave and Ehst-Karney parameterization methods. The results show that FWCD efficiency is notable in two frequency regimes, i.e., integral >= 85 MHz and integral = 50-65 MHz, where ion cyclotron absorption is effectively avoided, and the maximum on-axis driven current per unit power can reach 120 kA/MW. The sensitivity of the CD efficiency to the minority ion concentration is confirmed, owing to fast wave mode conversion, and the peak MCCD efficiency is reached for 22% minority-ion concentration. The effects of the wave-launch position and the toroidal wavenumber on the efficiency of current drive are also investigated. Published by AIP Publishing.
作者机构：
[Yin Lan; Du Dan] Univ South China, Dept Math & Phys, Hengyang 421001, Peoples R China.;[Gong Xueyu; Xiang Dong; Li Jingchun] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
通讯机构：
[Gong Xueyu] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
关键词：
ICRH antenna;impedance matching;transmission line theory
摘要：
The impedance matching is crucial for continuous wave operation of ion cyclotron resonance heating (ICRH) antennae with high power injection into plasmas. A sudden increase in the reflected radio frequency power due to an impedance mismatch of the ICRH system is an issue which must be solved for present-day and future fusion reactors. This paper presents a method for theoretical analysis of ICRH system impedance matching for a triple liquid stub tuner under plasma operational conditions. The relationship of the antenna input impedance with the plasma parameters and operating frequency is first obtained using a global solution. Then, the relations of the plasma parameters and operating frequency with the matching liquid heights are indirectly obtained through numerical simulation according to transmission line theory and matching conditions. The method provides an alternative theoretical method, rather than measurements, to study triple liquid stub tuner impedance matching for ICRH, which may be beneficial for the design of ICRH systems on tokamaks.
作者机构：
[尹岚] University of South China Department of Mathematics and Physics, Hengyang 421001, China;[李达] China Southern Power Grid, Guangzhou 510000, China;[沈辉] Sun Yat-sen University Solar Energy Research Institute, Guangzhou 510000, China;[黄岳文] China Electronics Technology Group Corporation, Changsha 410081, China
通讯机构：
China Southern Power Grid, China
关键词：
栅线电极优化;转换效率
摘要：
利用新型二维PC2D软件研究高方阻均匀发射极太阳能电池的栅线电极对电池性能的影响，通过对细栅线的宽度和排布方式的优化，增大填充因子，找到常规电池的效率极限。结果表明，在不采用复杂电池结构的情况下，以现有大规模生产工艺条件为基础，细栅线优化后(正面细栅线109根，线宽为40 μm)，在常规电池中能实现19.09%以上的效率。 In order to improve the fill factor and efficiency of the homogeneous high sheet resistance emitter solar cell, the effect of the gridline pattern on the performance of the solar cell was studied by using PC2D software. The results show that the efficiency of the solar cell can reach 19.09% after the optimization of the gridline pattern(109 gridlines with a width of 40 μm). The results indicate that a high efficiency can be realized for solar cell with homogeneous emitter without employing complicated structure and fabrication process.
