UEDGE-CRUMPET predicted isotopologue effect on atomic and molecular emission in DIII-D high-recycling divertor plasmas

被引：1
|
作者：
Holm, Andreas [1 ]
Groth, Mathias [1 ]
McLean, Adam [2 ]
Scotti, Filippo [2 ]
Rognlien, Thomas D. [2 ]
Meyer, William H. [2 ]
Shafer, Morgan W. [3 ]
Wilcox, Robert S. [3 ]
Hollmann, Eric M. [4 ]
机构：
[1] Aalto Univ, Espoo, Finland
[2] Lawrence Livermore Natl Lab, Livermore, CA USA
[3] Oak Ridge Natl Lab, Oak Ridge, TN USA
[4] Univ Calif San Diego, San Diego, CA USA
来源：
NUCLEAR MATERIALS AND ENERGY | 2023年 / 34卷
基金：
芬兰科学院;
关键词：
DIII-D; UEDGE; Isotope effect; Molecules; Lyman-Werner; Fulcher; Lyman-alpha; Balmer-alpha; CRUMPET; Edge-fluid simulations; Collisional-radiative; DETACHMENT; FLUXES;
D O I：
10.1016/j.nme.2022.101337
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
UEDGE-CRUMPET simulations indicate the impact of the molecular hydrogenic isotopologue effect under high -recycling LFS divertor conditions in DIII-D to be negligible for electron density and temperature profiles at the LFS target plate. A 30% decrease in molecular content, accompanied by a 10% increase in atomic content, is predicted for deuterium compared to hydrogen. The predicted isotopologue effect on the radiative power balance, validated with calibrated spectroscopy, is found to be small despite a 20% increase in LFS divertor molecular band emission for deuterium compared to hydrogen. The predictions and measurements show a negligible contribution of molecularly-induced atomic and direct molecular emission to the total radiative power balance under high-recycling conditions, consistent with previous EDGE2D-EIRENE investigations. The UEDGE-CRUMPET simulations were performed using effective hydrogen and deuterium rates considering molecular breakup and excitation processes for H2 and D2, calculated by the CRUMPET collisional-radiative model.
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