Predictive outlook for experiments resolving prompt vs local redeposition of high-Z materials in tokamaks

被引：0
作者：
Easley, D. C. [1 ,2 ,3 ]
Johnson, C. A. [2 ]
Diaw, A. [2 ]
Younkin, T. R. [2 ]
Donovan, D. C. [3 ]
Unterberg, E. A. [2 ]
Abe, S. [4 ]
机构：
[1] Oak Ridge Inst Sci & Educ, Oak Ridge, TN 37830 USA
[2] Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA
[3] Univ Tennessee Knoxville, Knoxville, TN 37996 USA
[4] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA
来源：
PLASMA PHYSICS AND CONTROLLED FUSION | 2025年 / 67卷 / 03期
关键词：
high-Z redeposition; design of experiment; plasma material interaction; synthetic diagnostics; B-to-PFC pitch angle; net erosion sensitivity; TUNGSTEN; EROSION; TRANSPORT; DIVERTOR;
D O I：
10.1088/1361-6587/adb64a
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
High-Z plasma facing components redeposit within the sheath through a combination of two distinct mechanisms: prompt (or geometric-driven) and local (or sheath-driven) redeposition. Experimental efforts are needed to determine the leading-order parameters influencing prompt-vs-local trade-off, which sets the fraction of material entering the scrape-off layer. In preparation for such experiments, leading-order parameters are isolated within the PYEAD-RustBCA-GITR coupled net erosion code using Sobol' sensitivity analysis. Then, experiments resolving prompt-vs-local trade-off under variation of these leading-order parameters are proposed using an isotopic coupon design with multifaceted diagnostic coverage. The measurability of these experiments is evaluated using synthetic diagnostics.
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页数：10
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