Magnetohydrodynamics (MHD) activity is analyzed for a particular KSTAR discharge category, the main features of which are a high- ##IMG## [http://ej.iop.org/images/0029-5515/60/12/126023/nfabb25bieqn1.gif] {$q_\mathrm{min}$} and a broad q profile. An interesting finding in this scenario is that a steady-state high- ##IMG## [http://ej.iop.org/images/0029-5515/60/12/126023/nfabb25bieqn2.gif] {$q_\mathrm{min}$} and broad q profile has been constructed even without a strong off-axis current drive scheme. Time traces of magnetics spectrograms and electron cyclotron emission imaging (ECEI) clearly show that Alfvénic type MHD activity appears as a high- ##IMG## [http://ej.iop.org/images/0029-5515/60/12/126023/nfabb25bieqn3.gif] {$q_\mathrm{min}$} and broad q profile is formed. Conversely, this activity disappears as the current profiles evolve toward a low- ##IMG## [...] {$q_\mathrm{min}$}

中文翻译：

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快速离子转运操纵安全因子谱在KSTAR早期转移放电中的作用

针对特定的KSTAR放电类别分析了磁流体动力学（MHD）活动，该类别的主要特征是具有较高的## IMG ## [http://ej.iop.org/images/0029-5515/60/12/126023 /nfabb25bieqn1.gif] {$ q_ \ mathrm {min} $}和一个广泛的q配置文件。在这种情况下，一个有趣的发现是，稳态高## IMG ## [http://ej.iop.org/images/0029-5515/60/12/126023/nfabb25bieqn2.gif] {$ q_ \即使没有强大的离轴电流驱动方案，也可以构建mathrm {min} $}和宽泛的q轮廓。磁谱图和电子回旋加速器发射成像（ECEI）的时间轨迹清楚地表明Alfvénic型MHD活性表现为高-## IMG ## [http://ej.iop.org/images/0029-5515/60/12 /126023/nfabb25bieqn3.gif] {$ q_ \ mathrm {min} $}并形成宽q轮廓。反过来，