Performance of X-wave ECH/ECCD on current ramp-up plasmas in fusion tokamaks
Performance of X-wave ECH/ECCD on current ramp-up plasmas in fusion tokamaks
复制标题
X 波 ECH/ECCD 对聚变托卡马克电流斜坡上升等离子体的性能
DOI：
10.1088/1741-4326/aad4c7
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发表时间：
2018
期刊：
影响因子：
3.3
通讯作者：
T. Maekawa
中科院分区：
文献类型：
--
作者：
Fujisawa A.;Nagashima Y.;Yamasaki K.;Inagaki S.;Yamada T.;Sasaki M.;T. Maekawa
在电子温度为-22.5 keV、密度为ne = 1.0-m− 3的范围内（对应于聚变托卡马克中电流上升阶段的等离子体），对低场侧X波和O波ECH/ECCD的加热局域性和电流驱动效率进行了理论研究. X波的性能优于O波的性能，直到keV，在此之上O波的性能仍然随着Te而改善，而X波的性能随着Te而恶化，这是由于在波穿透到等离子体芯处的基本吸收区域之前通过二次谐波共振的吸收。当T e增加到10 keV时，X波的截止密度比冷等离子体截止密度增加了15%。
Heating locality and current drive efficiency of X-wave and O-wave ECH/ECCD from the lower field side are theoretically investigated for tokamak plasmas in the range of the electron temperature–22.5 keV and the density n e= 1.0–m− 3, corresponding to the plasmas in the current ramp-up phase in fusion tokamaks. Performance of X-waves is better than that of O-waves up to keV, above which O-wave performance still improves with T e, while X-wave performance deteriorates with T e due to the absorption via second harmonic resonance before the waves penetrate into the fundamental absorption area at the plasma core. When T e increases to 10 keV, the cutoff density for X-waves increases by 15% beyond the cold plasma cutoff density.