Characteristics of boundary plasmas after the removal of divertor baffle plates and boronization on JFT-2M
Characteristics of boundary plasmas after the removal of divertor baffle plates and boronization on JFT-2M
复制标题
JFT-2M去除偏滤板并渗硼后边界等离子体特性
DOI：
10.1016/s0022-3115(02)01516-7
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发表时间：
2003
影响因子：
3.1
通讯作者：
H. Kimura
中科院分区：
文献类型：
--
作者：
H. Kawashima;S. Sengoku;K. Tsuzuki;H. Ogawa;H. Kimura
利用JFT-2 M上的闭合偏滤器（CD 2）实现了H模式下的致密冷偏滤器（nediv = 2× 1019 m −3，Tediv = 6 eV）。通过移除所有挡板，在打开（OD）和关闭配置之间比较这种条件。当在L模式下向偏滤器区引入强喷气时，中性粒子回流的减少和偏滤器区辐射局域化的增强证实了CD 2的阻挡效应。对于OD情况，在H模式期间引入强喷气，当辐射损失分数超过临界水平时，H模式在早期阶段被终止。一个致密和冷偏滤器，如在CD 2的情况下，没有得到。这是由于与CD 2配置相比，OD缺乏颗粒处理能力。作为初步结果，硼化后的辐射损失分数减少了一半，这阻止了H-L转变。
A dense and cold divertor (nediv∼2×1019m−3, Tediv∼6 eV) during H-mode, was realized with the closed divertor (CD2) on JFT-2M. By removing all baffle plates, such a condition was compared between open (OD) and closed configurations. When a strong gas-puff is introduced into the divertor region during L-mode, the baffling effect of CD2 is verified definitely by the reduction of neutral particle backflow and the enhanced radiation localization in the divertor region. Introducing a strong gas-puff during H-mode for the OD case, H-mode is terminated in an early stage when the radiation loss fraction exceeds a critical level. A dense and cold divertor, as shown in the CD2 case, is not obtained. This is attributed to the lack of particle-handling capability for the OD compared with the CD2 configuration. As an initial result, the radiation loss fraction was reduced by half after the boronization which prevents the H–L transition.