Improved performance of electron cyclotron resonance heating by perpendicular injection in the Large Helical Device
Improved performance of electron cyclotron resonance heating by perpendicular injection in the Large Helical Device
复制标题
大型螺旋装置垂直注入电子回旋共振加热性能的改进
DOI：
10.1088/1741-4326/abc977
复制
发表时间：
2020
期刊：
影响因子：
3.3
通讯作者：
The LHD Experiment Group
中科院分区：
文献类型：
--
作者：
Tsujimura T.I.;Yanai R.;Mizuno Y.;Tanaka K.;Yoshimura Y.;Tokuzawa T.;Nishiura M.;Sakamoto R.;Motojima G.;Kubo S.;Shimozuma T.;Igami H.;Takahashi H.;Yoshinuma M.;Ohshima S.;The LHD Experiment Group
研制了一种用于大型螺旋装置(LHD)等离子体的电子回旋共振加热(ECRH)能量注入实时联锁系统。该系统实现了垂直喷射，从而使ECRH的性能比以前在LHD中实现的任何时候都要高。与传统的斜向传播相比，电子回旋波在77 GHz的垂直传播对折射的影响更加不敏感。对于中心电子密度为1×1019m−3的1 mW注入，垂直注入情况下的中心电子温度比标准斜向注入情况下的中心电子温度高约2keV。在此基础上，首次在铲运机上成功地实现了多个氢冰丸注入后8×1019m−3高密度等离子体的稳定运行。
A real-time interlock system for power injection in electron cyclotron resonance heating (ECRH) was developed to be applied to Large Helical Device (LHD) plasma. This system enabled perpendicular injection, thus improving the performance of ECRH more than has ever been achieved before in LHD. Perpendicular propagation of the electron cyclotron wave at 77 GHz became more insensitive to the effect of refraction in comparison to the conventional oblique propagation. The achieved central electron temperature in the case of perpendicular injection was approximately 2 keV higher than that in the case of standard oblique injection for a central electron density of 1× 10 19 m− 3 by 1 MW injection. With such improved performance of ECRH, high-density ECRH plasma of 8× 10 19 m− 3 was successfully sustained after the injection of multiple hydrogen ice pellets for the first time in LHD.