Impurity behaviour in LHD long pulse discharges
Impurity behaviour in LHD long pulse discharges
复制标题
LHD 长脉冲放电中的杂质行为
DOI：
10.1088/0741-3335/44/10/304
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
O. Motojima
中科院分区：
文献类型：
--
作者：
Y. Nakamura;Y. Takeiri;B. Peterson;S. Muto;K. Ida;H. Funaba;M. Yokoyama;K. Narihara;Y. Nagayama;S. Inagaki;T. Tokuzawa;S. Morita;M. Goto;K. Sato;M. Osakabe;S. Masuzaki;H. Suzuki;R. Kumazawa;T. Mutoh;T. Shimozuma;M. Sato;N. Noda;K. Kawahata;N. Ohyabu;O. Motojima
研究了中性束加热LHD长脉冲放电10 s时的本征杂质行为。光谱和辐射测量表明，由于金属杂质的存在，堆芯辐射显著增加。中心杂质积累发现在一个狭窄的等离子体密度区域（e = 1-3×1019 m−3）的密度递增放电和恒定密度放电。在密度爬坡放电中，高z杂质在低密度区积聚，在高密度区从核心等离子体扩散出去。将杂质行为与新古典预测进行了比较。
Intrinsic impurity behaviour in neutral beam heated LHD long pulse discharges with a discharge duration of 10 s was investigated. Spectroscopic and bolometric measurements showed a remarkable temporal increase of core radiation due to metallic impurities. Central impurity accumulation was found in a narrow plasma density region (e = 1–3×1019 m−3) for both density ramp-up discharges and constant density discharges. In the density ramp-up discharges, high-Z impurities were accumulated in the low-density region and diffused out from the core plasma in the high-density region. The impurity behaviour was compared with neoclassical predictions.