Impurity confinement and transport in high confinement regimes without edge localized modes on DIII-Da)
Impurity confinement and transport in high confinement regimes without edge localized modes on DIII-Da)
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DOI：
10.1063/1.4918359
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发表时间：
2015-04
影响因子：
2.2
通讯作者：
B. Grierson;K. Burrell;R. Nazikian;W. Solomon;A. Garofalo;E. Belli;G. Staebler;M. Fenstermacher;G. McKee;T. Evans;D. Orlov;Sterling P. Smith;C. Chrobak;C. Chrystal;DIII-D Team
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文献类型：
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作者：
B. Grierson;K. Burrell;R. Nazikian;W. Solomon;A. Garofalo;E. Belli;G. Staebler;M. Fenstermacher;G. McKee;T. Evans;D. Orlov;Sterling P. Smith;C. Chrobak;C. Chrystal;DIII-D Team
DIII-D托卡马克中的杂质输运[J. L. Luxon，Nucl. Fusion 42，614（2002）]在没有边缘局域模（ELM）的静态高约束（H-模）状态下进行了研究。在共振磁扰动（RMP）、ELM抑制和QH模维持的等离子体中，氟（Z = 9）的约束时间与40 Hz ELM的ELMing放电中的约束时间相当。对于带有杂质注入的选定放电，杂质粒子约束时间与能量约束时间的比值在τp/τe = 2−3的范围内。在QH模式操作中，边缘谐振的强烈、相干磁和密度波动的杂质限制时间比较弱的波动要小。输运系数来自杂质密度分布的时间演化，并与新古典和湍流输运模型NEO和TGLF进行比较。氟的新古典运输被发现是小的实验值相比。在ELMing和RMP ELM-suppress.
Impurity transport in the DIII-D tokamak [J. L. Luxon, Nucl. Fusion 42, 614 (2002)] is investigated in stationary high confinement (H-mode) regimes without edge localized modes (ELMs). In plasmas maintained by resonant magnetic perturbation (RMP), ELM-suppression, and QH-mode, the confinement time of fluorine (Z = 9) is equivalent to that in ELMing discharges with 40 Hz ELMs. For selected discharges with impurity injection, the impurity particle confinement time compared to the energy confinement time is in the range of τp/τe≈2−3. In QH-mode operation, the impurity confinement time is shown to be smaller for intense, coherent magnetic, and density fluctuations of the edge harmonic oscillation than weaker fluctuations. Transport coefficients are derived from the time evolution of the impurity density profile and compared to neoclassical and turbulent transport models NEO and TGLF. Neoclassical transport of fluorine is found to be small compared to the experimental values. In the ELMing and RMP ELM-suppress...