Erosion of lithium coatings on TZM molybdenum and graphite during high-flux plasma bombardment

被引：25

作者：

Abrams, T. ^{[1
]}

Jaworski, M. A. ^{[1
]}

Kaita, R. ^{[1
]}

Stotler, D. P. ^{[1
]}

De Temmerman, G. ^{[2
]}

Morgan, T. W. ^{[2
]}

van den Berg, M. A. ^{[2
]}

van der Meiden, H. J. ^{[2
]}

机构：

[1] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA

[2] EURATOM, FOM, Trilateral Euregio Cluster, FOM Inst DIFFER Dutch Inst Fundamental Energy Res, NL-3430 BE Nieuwegein, Netherlands

来源：

FUSION ENGINEERING AND DESIGN | 2014年 / 89卷 / 12期

关键词：

Lithium; Lithium sputtering; Lithium evaporation; Lithium radiation; Lithium plasma surface interaction; LIQUID LITHIUM; BORONIZATION; OPERATION;

D O I：

10.1016/j.fusengdes.2014.06.005

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：

The rate at which Li films will erode under plasma bombardment in the NSTX-U divertor is currently unknown. It is important to characterize this erosion rate so that the coatings can be replenished before they are completely depleted. An empirical formula for the Li erosion rate as a function of deuterium ion flux, incident ion energy, and Li temperature was developed based on existing theoretical and experimental work. These predictions were tested on the Magnum-PSI linear plasma device capable of ion fluxes >10(24) m(-2) s(-1), ion energies of 20 eV and Li temperatures >800 degrees C. Li-coated graphite and TZM molybdenum samples were exposed to a series of plasma pulses during which neutral Li radiation was measured with a fast camera. The total Li erosion rate was inferred from measurements of Li-I emission. The measured erosion rates are significantly lower than the predictions of the empirical formula. Strong evidence of fast Li diffusion into graphite substrates was also observed. Published by Elsevier B.V.

引用

页码：2857 / 2863

页数：7

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