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首页> 外文期刊>Bulletin of the American Physical Society >APS -59th Annual Meeting of the APS Division of Plasma Physics - Event - Synthetic Gas Puff Imaging Diagnostic for the XGC1 Turbulence Code
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APS -59th Annual Meeting of the APS Division of Plasma Physics - Event - Synthetic Gas Puff Imaging Diagnostic for the XGC1 Turbulence Code

机译：APS-等离子体物理APS部门第59届年会-事件-XGC1湍流代码的合成气吹成像诊断

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The full-$f$ edge gyrokinetic code XGC1 has been used recently to study problems of significant interest, such as thedivertor heat flux widthfootnote{C.S. Changet al., Nucl. Fusion 57 (in press; 2017).} and the L-H transitionfootnote{C.S. Chang et al., Phys. Rev. Lett. 118,175001 (2017).}. Moreover,XGC1 simulations of the heat flux width in ITER have different edge turbulence characteristics that leadto widthslarge relative to those based on empiricalscalings. To be confident that this and other XGC1 predictionsare accurate will require more detailed validation tests ofthe code against experimental data. One invaluable source of such data is the gas puff imaging(GPI) technique, which measures edge plasma turbulence. We have developeda synthetic GPI diagnostic for XGC1 based on the DEGAS 2 neutral transport code, allowing a direct comparison of simulated and observed turbulence characteristics, such as fluctuation amplitude,auto-correlation time, and correlation lengths. The DEGAS~2simulations are 3-D and have sub-microsecond timeresolution; both Alcator C-Mod fast camera and APD images are produced. We will describe the synthetic diagnostic and present aninitial comparison of its results with the correspondingGPI data from two C-Mod discharges.
机译：全$ f $边缘陀螺动力学代码XGC1最近已用于研究重大问题，例如分流器热通量宽度脚注{C.S.更改，Nucl。 Fusion 57（印刷中; 2017年）。}和L-H过渡脚注{C.S. Chang等，物理学。莱特牧师118,175001（2017）。}。此外，XGC1对ITER中热通量宽度的模拟具有不同的边缘湍流特性，从而导致宽度相对于基于经验标度的宽度更大。要确信此预测和其他XGC1预测是准确的，将需要针对实验数据对代码进行更详细的验证测试。此类数据的一个宝贵来源是吹气成像（GPI）技术，该技术可测量边缘等离子体湍流。我们已经基于DEGAS 2中性传输代码开发了针对XGC1的合成GPI诊断程序，可以直接比较模拟和观察到的湍流特性，例如波动幅度，自相关时间和相关长度。 DEGAS〜2仿真是3-D且具有亚微秒的时间分辨率; Alcator C-Mod快速相机和APD图像均可生成。我们将描述综合诊断，并将其结果与来自两个C-Mod放电的相应GPI数据进行初步比较。

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