Thermographic study of heat load asymmetries during MAST L-mode discharges
Thermographic study of heat load asymmetries during MAST L-mode discharges
复制标题
MAST L 模式放电期间热负荷不对称性的热成像研究
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
P. Tamain
中科院分区：
文献类型：
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作者：
G. De Temmerman;E. Delchambre;J. Dowling;A. Kirk;S. Lisgo;P. Tamain
一个长波长范围红外（LWIR）相机已安装在MAST补充现有的中波红外（MWIR）系统。在MAST的上下偏滤器中同时进行了长波/中波红外温度测量。正如预期的那样，长波红外系统对地表热点的干扰不太敏感。使用这两个系统的表面效应的彻底校正，提高了在MAST的热通量计算的可靠性。作为磁几何形状的函数的热负荷不对称性的仔细评估已进行了各种L-模式放电（单和双零，反向和正向场）。在所有情况下，到达刮去层的大部分能量都流向了外偏滤器。的输入/输出功率比被发现是不同的较低和较高的单零放电与更多的权力去外偏滤器在后一种情况下。此外，还发现上、下偏滤器的热流剖面宽度不同。二次撞击点处的热流密度剖面宽度随温度的升高而增大，|δrsep|.
A long wavelength range infrared (LWIR) camera has been installed on MAST to compliment the existing medium wave infrared (MWIR) system. Simultaneous LWIR/MWIR temperature measurements have been made in the lower and upper divertors of MAST. As expected, the LWIR system is less sensitive to disturbances from hot spots on the surface. A thorough correction of the surface effects using both systems has improved the reliability of the heat flux calculations in MAST. A careful assessment of the heat load asymmetries as a function of the magnetic geometry has been carried out during a variety of L-mode discharges (single and double null, reversed and forward field). In all cases, most of the energy arriving in the scrape-off layer goes to the outer divertor. The in/out power ratio is found to be different for lower and upper single-null discharges with more power going to the outer divertor in the latter case. In addition, it is found that the heat flux profile width is different in the upper and lower divertor. The heat flux profile width at the secondary strike point increases with increasing |δrsep|.
影响因子：
2.2
作者：
J. Ahn;G. Counsell;A. Kirk
通讯作者：
J. Ahn;G. Counsell;A. Kirk