Gyrokinetic GENE simulations of DIII-D near-edge L-mode plasmas
Gyrokinetic GENE simulations of DIII-D near-edge L-mode plasmas
复制标题
DIII-D 近边缘 L 模式等离子体的回旋 GENE 模拟
DOI：
10.1063/1.5052047
复制
发表时间：
2018
影响因子：
2.2
通讯作者：
Z. Yan
中科院分区：
文献类型：
--
作者：
T. Neiser;F. Jenko;T. Carter;L. Schmitz;D. Told;G. Merlo;A. Navarro;P. Crandall;G. McKee;Z. Yan
我们目前的陀螺动力学模拟的GENE代码解决的近边缘区域的L-模式等离子体在DIII-D托卡马克。在径向位置$\rho=0.80$，模拟与离子温度梯度增加了$40\%$以上的标称值给出电子和离子的热通量，同时与实验一致。该梯度增加与1.6 σ水平的电荷交换电离光谱（CER）测量的统计和系统不确定性相结合。首次在近边缘采用真实的质量比和几何形状进行了多尺度模拟。这些多尺度模拟表明，通量匹配离子尺度模拟的高度不稳定的离子温度梯度（ITG）模式抑制电子尺度传输，使得离子尺度模拟在该位置是足够的。在径向位置$\rho=0.90$，非线性模拟显示ITG和捕获的电子模式~（TEM）的混合状态，这是从线性模拟中没有预料到的。的非线性模拟再现总的实验热通量与列入$\mathbf{E} \times \mathbf{B}$剪切效应和电子温度梯度增加$\sim 23\%$。这种梯度的增加是兼容的组合统计和系统的汤姆逊散射数据的不确定性在1.3\sigma$的水平。这些结果是一致的，与以前的研究结果，gyrokinetic模拟能够重现实验热通量通过改变输入参数接近他们的实验不确定性，推动验证前沿更接近边缘区域。
We present gyrokinetic simulations with the GENE code addressing the near-edge region of an L-mode plasma in the DIII-D tokamak. At radial position $\rho=0.80$, simulations with the ion temperature gradient increased by $40\%$ above the nominal value give electron and ion heat fluxes that are in simultaneous agreement with the experiment. This gradient increase is consistent with the combined statistical and systematic uncertainty $\sigma$ of the Charge Exchange Recombination Spectroscopy (CER) measurements at the $1.6 \sigma$ level. Multi-scale simulations are carried out with realistic mass ratio and geometry for the first time in the near-edge. These multi-scale simulations suggest that the highly unstable ion temperature gradient (ITG) modes of the flux-matched ion-scale simulations suppress electron-scale transport, such that ion-scale simulations are sufficient at this location. At radial position $\rho=0.90$, nonlinear simulations show a hybrid state of ITG and trapped electron modes~(TEMs), which was not expected from linear simulations. The nonlinear simulations reproduce the total experimental heat flux with the inclusion of $\mathbf{E} \times \mathbf{B}$ shear effects and an increase in the electron temperature gradient by $\sim 23\%$. This gradient increase is compatible with the combined statistical and systematic uncertainty of the Thomson scattering data at the $1.3 \sigma$ level. These results are consistent with previous findings that gyrokinetic simulations are able to reproduce the experimental heat fluxes by varying input parameters close to their experimental uncertainties, pushing the validation frontier closer to the edge region.
影响因子：
1.7
作者：
D. Batchelor;Micah Beck;A. Becoulet;R. Budny;Choong-Seock Chang;P. Diamond;J. Dong;G. Fu;A. Fukuyama;T. Hahm;D. Keyes;Y. Kishimoto;S. Klasky;L. Lao;K. Li;Zhihong Lin;Bertram Ludäscher;J. Manickam;N. Nakajima;T. Ozeki;N. Podhorszki;W. Tang;M. Vouk;R. Waltz;Shaojie Wang;H. Wilson;X. Xu;M. Yagi;F. Zonca
通讯作者：
D. Batchelor;Micah Beck;A. Becoulet;R. Budny;Choong-Seock Chang;P. Diamond;J. Dong;G. Fu;A. Fukuyama;T. Hahm;D. Keyes;Y. Kishimoto;S. Klasky;L. Lao;K. Li;Zhihong Lin;Bertram Ludäscher;J. Manickam;N. Nakajima;T. Ozeki;N. Podhorszki;W. Tang;M. Vouk;R. Waltz;Shaojie Wang;H. Wilson;X. Xu;M. Yagi;F. Zonca
影响因子：
2.2
作者：
C. Holland;L. Schmitz;T. Rhodes;W. Peebles;J. Hillesheim;Gang Wang;L. Zeng;E. Doyle;Sterling P. Smith;R. Prater;K. Burrell;J. Candy;R. Waltz;J. Kinsey;G. Staebler;J. Deboo;C. Petty;G. McKee;Zheng Yan;A. White
通讯作者：
C. Holland;L. Schmitz;T. Rhodes;W. Peebles;J. Hillesheim;Gang Wang;L. Zeng;E. Doyle;Sterling P. Smith;R. Prater;K. Burrell;J. Candy;R. Waltz;J. Kinsey;G. Staebler;J. Deboo;C. Petty;G. McKee;Zheng Yan;A. White
DOI：
--
发表时间：
--
期刊：
影响因子：
--
作者：
通讯作者：
--