...
首页> 外文期刊>Nuclear fusion >H-mode physics of near double null plasmas in MAST and its applications to other tokamaks
【24h】

H-mode physics of near double null plasmas in MAST and its applications to other tokamaks

机译:MAST中接近双无效等离子体的H模式物理学及其在其他托卡马克中的应用

获取原文
获取原文并翻译 | 示例
           

摘要

High triangularity regimes, approaching double null, have become more important recently. H-mode access and edge stability are affected by the close proximity of the second X-point to the last closed flux surface, but more experimental evidence is needed. Inter-machine comparisons of MAST with ASDEX Upgrade (AUG) and NSTX confirm the reduction of the H-mode power threshold in the true double null configuration (C-DN), first reported on MAST. A more negative radial edge electric field in L-mode observed on MAST and ASDEX Upgrade may be connected to the improved H-mode access. About twice the power density is needed on MAST to achieve edge pressures similar to AUG in L- and H-modes. However, on MAST the pressure is dominated by the edge density in H-mode. So far, in single null (SN) ELMs have not been observed on MAST with neutral beam heating powers P-NBI <= 2 MW, due to the different edge profiles in SN H-mode. This is supported by the modelling of the stability of the measured edge profiles against ideal peeling-ballooning.
机译:接近双重无效的高三角形性制度最近变得越来越重要。 H模式访问和边缘稳定性受第二个X点与最后一个封闭通量表面的紧密接近程度的影响,但是还需要更多的实验证据。带有ASDEX升级(AUGEX)和NSTX的MAST在机器之间的比较确认了真正的双空配置(C-DN)中H模式功率阈值的降低,这是在MAST上首次报道的。在MAST和ASDEX升级版上观察到的L模式下更负的径向边缘电场可能与改进的H模式访问有关。 MAST需要大约两倍的功率密度才能达到类似于L模式和H模式下的AUG的边缘压力。但是,在MAST上,压力由H模式下的边缘密度决定。到目前为止,由于SN H模式下的不同边缘轮廓,在中性束加热功率P-NBI <= 2 MW的MAST上尚未观察到单个零(SN)ELM。这是通过对理想边缘剥离气球的测量边缘轮廓稳定性的建模来支持的。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号