Long ELMy H-mode KSTAR discharges are used to show that low frequencies ( ##IMG## [http://ej.iop.org/images/0029-5515/60/12/124002/nfabb2d6ieqn1.gif] {$\,\,f\lesssim 50\:\mathrm{kHz}$} ) of the ion-scale density fluctuations contain electromagnetic components that transfer energy from ##IMG## [http://ej.iop.org/images/0029-5515/60/12/124002/nfabb2d6ieqn2.gif] {$f\lesssim 15\:\mathrm{kHz}$} to higher frequency ( ##IMG## [http://ej.iop.org/images/0029-5515/60/12/124002/nfabb2d6ieqn3.gif] {$15\:\mathrm{kHz} \lesssim\ f\ \lesssim 100\:\mathrm{kHz}$} ) fluctuations during ELM crashes via three-wave non-linear interactions. Such non-linear interactions are not observed during the inter-ELM phases. These observations suggest that investigations on the enhanced fluctuation and transport levels during ELM crashes require a careful analysis of the non-linear couplings between low frequency electromagnetic and broadband fluctuat...

中文翻译：

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边缘局部模式崩溃期间从低频电磁波动到宽带湍流的非线性能量转移

长ELMy H模式KSTAR放电用于显示低频（## IMG ## [http://ej.iop.org/images/0029-5515/60/12/124002/nfabb2d6ieqn1.gif] {$ \ ，\，f \ lesssim 50 \：\ mathrm {kHz} $}）中包含电磁分量，这些电磁分量从## IMG ## [http://ej.iop.org/images/0029 -5515 / 60/12/124002 / nfabb2d6ieqn2.gif] {$ f \ lesssim 15 \：\ mathrm {kHz} $}至更高的频率（## IMG ## [http://ej.iop.org/images/ 0029-5515 / 60/12/124002 / nfabb2d6ieqn3.gif] {$ 15 \：\ mathrm {kHz} \ lesssim \ f \ \ lesssim 100 \：\ mathrm {kHz} $}）在ELM崩溃期间通过三波非-线性相互作用。在ELM间阶段未观察到此类非线性相互作用。