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Title: Post exposure time dependence of deuterium retention in lithium and lithium compounds

Abstract

Lithium (Li) coating of plasma-facing components (PFC) has led to improved plasma performance in fusion experiments due to the effectiveness of Li in retaining hydrogen (H) isotopes and thus reducing recycling. Since Li readily reacts with background gases present in fusion experiments, it is important to understand and parameterize the time dependence of deuterium (D) retention in Li and Li compounds for applications of Li under future long-pulse plasma conditions. D retention in pure Li and composite Li—O and Li—C—O films was studied as a function of time after these films were exposed to 450 eV D 2 + ion irradiation. The amount of deuterium retained in both Li and Li—O films at 300 K decreased at the same rate by 45% after 16 h. In conclusion, the amount of D retained in Li—C—O films was found to be independent of time up to 3 days. Increasing the temperature of a pure Li film to 420 K increased this rate of decrease by 50%, while increasing the thickness of the lithium film from 3 to 16 monolayers had no effect on the decrease rate.

Authors:
 [1];  [1];  [1];  [2]; ORCiD logo [1]
  1. Princeton Univ., Princeton, NJ (United States)
  2. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1503682
Grant/Contract Number:  
SC0012890
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Materials and Energy
Additional Journal Information:
Journal Volume: 19; Journal Issue: C; Journal ID: ISSN 2352-1791
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Deuterium retention; Lithium; Lithium compounds; Time dependence

Citation Formats

Yang, Y., Buzi, L., Nelson, A. O., Kaita, R., and Koel, B. E. Post exposure time dependence of deuterium retention in lithium and lithium compounds. United States: N. p., 2019. Web. doi:10.1016/j.nme.2019.01.031.
Yang, Y., Buzi, L., Nelson, A. O., Kaita, R., & Koel, B. E. Post exposure time dependence of deuterium retention in lithium and lithium compounds. United States. doi:10.1016/j.nme.2019.01.031.
Yang, Y., Buzi, L., Nelson, A. O., Kaita, R., and Koel, B. E. Fri . "Post exposure time dependence of deuterium retention in lithium and lithium compounds". United States. doi:10.1016/j.nme.2019.01.031. https://www.osti.gov/servlets/purl/1503682.
@article{osti_1503682,
title = {Post exposure time dependence of deuterium retention in lithium and lithium compounds},
author = {Yang, Y. and Buzi, L. and Nelson, A. O. and Kaita, R. and Koel, B. E.},
abstractNote = {Lithium (Li) coating of plasma-facing components (PFC) has led to improved plasma performance in fusion experiments due to the effectiveness of Li in retaining hydrogen (H) isotopes and thus reducing recycling. Since Li readily reacts with background gases present in fusion experiments, it is important to understand and parameterize the time dependence of deuterium (D) retention in Li and Li compounds for applications of Li under future long-pulse plasma conditions. D retention in pure Li and composite Li—O and Li—C—O films was studied as a function of time after these films were exposed to 450 eV D2+ ion irradiation. The amount of deuterium retained in both Li and Li—O films at 300 K decreased at the same rate by 45% after 16 h. In conclusion, the amount of D retained in Li—C—O films was found to be independent of time up to 3 days. Increasing the temperature of a pure Li film to 420 K increased this rate of decrease by 50%, while increasing the thickness of the lithium film from 3 to 16 monolayers had no effect on the decrease rate.},
doi = {10.1016/j.nme.2019.01.031},
journal = {Nuclear Materials and Energy},
number = C,
volume = 19,
place = {United States},
year = {2019},
month = {3}
}

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