Blob birth and propagation characteristics on the HL-2A tokamak
Blob birth and propagation characteristics on the HL-2A tokamak
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DOI：
10.1016/j.jnucmat.2010.10.032
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发表时间：
2011-08
影响因子：
3.1
通讯作者：
L. Yan;J. Cheng;W. Hong;K. Zhao;J. Qian;Q. Yang;J. Dong;X. Duan;Yong Liu
中科院分区：
文献类型：
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作者：
L. Yan;J. Cheng;W. Hong;K. Zhao;J. Qian;Q. Yang;J. Dong;X. Duan;Yong Liu
在HL-2A装置上，采用径向八探针阵列和极向十探针阵列（间距210 cm）的新型探针组合，研究了液滴的产生和传播特性。在分界线外，沿磁场线的平行波数沿着接近于零，在分界线内4- 8 mm，密度梯度最大，偏度接近于零。BloB极向速度在分界线处改变方向，符合E×B驱动机制。基于沿着磁力线的显著相关性，在条件平均下，清楚地观察到斑点穿过极线-径向平面中的分界线的传播。在遥远的SOL处，团状径向速度为0.5-0.6km/s，在SOL中，团状径向速度主导粒子损失。
Blob birth and propagation characteristics have been investigated on the HL-2A tokamak using the novel probe combination of a radial eight-probe array and a poloidal ten-probe array toroidally separated by 210cm. Outside of the separatrix, close zero parallel wave number along a magnetic field line was found. Inside the separatrix 4–8mm, density gradient has a maximum and the skewness is close to zero. Blob poloidal velocity changes its direction across the separatrix, which is consistent with E×B driven mechanism. Based on the significant correlation along a magnetic line, blob propagation across the separatrix in poloidal–radial plane is clearly observed with condition average. At the far SOL, blob radial velocity is 0.5–0.6km/s, which dominates the particle loss in the SOL.