Transition to ELM-free improved H-mode by lithium deposition on NSTX graphite divertor surfaces
Transition to ELM-free improved H-mode by lithium deposition on NSTX graphite divertor surfaces
复制标题
DOI：
10.1016/j.jnucmat.2009.01.203
复制
发表时间：
2009-06
影响因子：
3.1
通讯作者：
D. Mansfield;H. Kugel;R. Maingi;M. Bell;R. Bell;R. Kaita;J. Kallman;S. Kaye;B. LeBlanc
中科院分区：
文献类型：
--
作者：
D. Mansfield;H. Kugel;R. Maingi;M. Bell;R. Bell;R. Kaita;J. Kallman;S. Kaye;B. LeBlanc
锂蒸发到 NSTX 下部偏滤器中面向等离子体的组件上，大大提高了放电性能。随着锂的积累，先前表现出强大的 1 型 ELM 的等离子体逐渐转变为间歇性 ELM 放电，并最终转变为不断发展的无 ELM 放电。在此过程中，其他放电参数以复杂的方式发生变化。随着 ELM 消失，能量限制得到改善，并且观察到边缘和刮除层等离子体特性发生显着变化。这些结果表明，等离子体表面相互作用的主动修饰可以抢占大型 ELM。
Lithium evaporated onto plasma facing components in the NSTX lower divertor has made dramatic improvements in discharge performance. As lithium accumulated, plasmas previously exhibiting robust Type 1 ELMs gradually transformed into discharges with intermittent ELMs and finally into continuously evolving ELM-free discharges. During this sequence, other discharge parameters changed in a complicated manner. As the ELMs disappeared, energy confinement improved and remarkable changes in edge and scrape-off layer plasma properties were observed. These results demonstrate that active modification of plasma surface interactions can preempt large ELMs.