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首页> 外文期刊>Plasma physics and controlled fusion >Correlation between near scrape-off layer power fall-off length and confinement properties in JET operated with carbon and ITER-like wall
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Correlation between near scrape-off layer power fall-off length and confinement properties in JET operated with carbon and ITER-like wall

机译：用碳和浸泡壁近刮除截止层功率掉落长度和限制性能的相关性

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摘要

Combining high plasma core performance with a suitable power exhaust solution is one of the major challenges in magnetic confinement fusion research. One of the most important power exhaust parameters is the power fall-off length in the scrape-off layer. Two infrared thermography based power fall-off length data sets from JET operated with carbon and ITER-like wall are revisited and compared to recently published scaling laws as well as to confinement and pedestal top parameters. It is shown that the power fall-off length is correlated to confinement, with the highest correlation among the tested parameters being the pedestal top density. The power fall-off length decreases with increasing pedestal top density in variance to the multi-machine scaling law. A similar trend is observed for the pedestal top pressure. This is in agreement with findings at C-Mod showing a scaling of the power fall-off length in various confinement regimes with the volume averaged pressure. Further, it is shown that a variation of the safety factor at constant pedestal top density is not changing the power fall-off length significantly in the two JET data sets.
机译：将高等离子体核心性能与合适的功率排气解决方案结合起来是磁控隔音融合研究中的主要挑战之一。最重要的功率排气参数之一是刮削层中的功率下降长度。从碳和浸泡壁运行的喷气式射流的两种红外热成像的功率下降长度数据集并与最近公布的缩放法以及限制和基座顶部参数进行比较。结果表明，功率落场长度与限制相关，具有最高的测试参数之间的相关性是基座顶部密度。随着基座顶部密度的方差与多机扩展法的差异增加，电源落场长度降低。对于基座顶部压力，观察到类似的趋势。这与C-MOD的发现一致，示出了具有体积平均压力的各种限制制度中的功率下降长度的缩放。此外，示出了在两个喷射数据集中在两个喷射数据集中显着显着改变功率下降长度的安全系数。

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