The role of beryllium deuteride in plasma-beryllium interactions

被引：63

作者：

Doerner, R. P. ^{[1
]}

Baldwin, M. J. ^{[1
]}

Buchenauer, D. ^{[2
]}

De Temmerman, G. ^{[1
]}

Nishijima, D. ^{[1
]}

机构：

[1] Univ Calif San Diego, Energy Res Ctr, La Jolla, CA 92093 USA

[2] Sandia Natl Labs, Livermore, CA 94550 USA

来源：

JOURNAL OF NUCLEAR MATERIALS | 2009年 / 390-91卷

关键词：

INFRARED-EMISSION SPECTRA;

D O I：

10.1016/j.jnucmat.2009.01.187

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Beryllium deuteride has been measured in plasma-exposed surfaces and in the plasma column of the PISCES-B experiment. XPS measurements of high-purity BeH2 samples, used as standards, confirm the presence of beryllium deuteride in beryllium codeposited material (Be 1s energy of BeH2 bond = 115.0 eV). TDS measurements of high-purity BeD2 samples are used to accurately determine the decomposition temperature of the beryllium deuteride molecule (similar to 540 K). Deuterium release is observed from plasma-exposed beryllium samples and from Be codeposited layers at this temperature. BeD molecular (A-X) band emission is observed in beryllium seeded plasma discharges and during deuterium sputtering measurements of beryllium. Band emission intensities during Be-seeding are used to estimate the photon emission coefficient, <sigma v >, for the band. The <sigma v > value verifies that molecular sputtering of BeD (from beryllium targets saturated with deuterium from the plasma exposure) is a small fraction of the physical sputtering of beryllium atoms. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：681 / 684

页数：4

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