论文标题
关于岛分流热通量之间的相互作用，刮擦层径向电场和Wendelstein 7-X等离子体中的边缘湍流
On the interaction between the island divertor heat fluxes, the scrape-off layer radial electric field and the edge turbulence in Wendelstein 7-X plasmas
论文作者
论文摘要
SOL中的径向电场的形成，$ e _ {\ rm r} $已通过实验研究，用于在Stellarator W7-X中附着的转移条件。这项研究的主要目的是测试通常在Tokamaks中开发的复杂的3D岛分离的有效性，将$ e _ {\ rm rm rm} $与目标的鞘内降落梯度有关。此外，我们研究了边缘$ e _ {\ rm r} $剪切对减小密度波动振幅的影响，这是根据现有参考书目的建立现象。 SOL测量值的主要诊断是V波段多普勒反射计，可以提供$ e _ {\ rm rm r} $的测量以及具有良好空间分辨率的密度波动。已使用红外摄像机进行了分离参数的三维测量，并具有$λ_ {\ rm q} $，导致适合模型的$λ_ {\ rm t} $的合适代理。 In the investigated attached regimes, it is shown for the first time that the formation of the $E_{\rm r}$ in the SOL depends on parameters at the divertor, following a $E_{\rm r} \propto T_{\rm e} /λ_q$ qualitatively similar to that found in a tokamak.然后，从分析的等离子体中，在边缘观察到的$ e _ {\ rm r} $剪切链接到密度波动振幅的中等局部降低。
The formation of the radial electric field, $E_{\rm r}$ in the SOL has been experimentally studied for attached divertor conditions in stellarator W7-X. The main objective of this study is to test the validity in a complex 3D island divertor of simple models, typically developed in tokamaks, relating $E_{\rm r}$ to the sheath potential drop gradient at the target. Additionally, we investigate the effect of the edge $E_{\rm r}$ shear on the reduction of density fluctuation amplitude, a well-established phenomenon according to the existing bibliography. The main diagnostic for measurements in the SOL is a V-band Doppler reflectometer that can provide the measurement of the $E_{\rm r}$ and density fluctuations with good spatial resolution. Three-dimensional measurements of divertor parameters has been carried out using infrared cameras, with $λ_{\rm q}$ resulting a suitable proxy for the model-relevant $λ_{\rm T}$. In the investigated attached regimes, it is shown for the first time that the formation of the $E_{\rm r}$ in the SOL depends on parameters at the divertor, following a $E_{\rm r} \propto T_{\rm e} /λ_q$ qualitatively similar to that found in a tokamak. Then, from the analyzed plasmas, the observed $E_{\rm r}$ shear at the edge is linked to a moderate local reduction of the amplitude of density fluctuations.
