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Title: Fusion applications for lithium: wall conditioning in magnetic confinement devices

Abstract

The application of lithium to plasma facing components (PFCs) has been widely used to improve plasma performance in magnetic confinement devices. The ability of lithium to retain hydrogen isotopes has been exploited to lower wall recycling. Low recycling leads to high edge plasma temperatures, and decreased temperature gradients reduce the free energy source for microinstabilities that cause transport. A variety of techniques have been developed to introduce lithium into fusion research devices, and its beneficial effects have been observed in their plasmas. The mechanism for the retention of hydrogen isotopes has been elucidated by detailed surface science studies, and 'first principles' molecular dynamics simulations. The remaining challenges primarily pertain to long pulse operation. Our knowledge of erosion, transport, and redeposition needs to improve for the mixed material PFCs lithium creates. As a result, flowing liquid lithium systems also must be demonstrated for the replenishable lithium walls that fusion reactors require.

Authors:
ORCiD logo [1]
  1. Princeton Univ., Princeton, NJ (United States)
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1580275
Grant/Contract Number:  
AC02-09CH11466
Resource Type:
Accepted Manuscript
Journal Name:
Plasma Physics and Controlled Fusion
Additional Journal Information:
Journal Volume: 61; Journal Issue: 11; Journal ID: ISSN 0741-3335
Publisher:
IOP Science
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; magnetic confinement fusion; wall conditioning with lithium; low recycling walls

Citation Formats

Kaita, Robert. Fusion applications for lithium: wall conditioning in magnetic confinement devices. United States: N. p., 2019. Web. doi:10.1088/1361-6587/ab4156.
Kaita, Robert. Fusion applications for lithium: wall conditioning in magnetic confinement devices. United States. doi:10.1088/1361-6587/ab4156.
Kaita, Robert. Mon . "Fusion applications for lithium: wall conditioning in magnetic confinement devices". United States. doi:10.1088/1361-6587/ab4156.
@article{osti_1580275,
title = {Fusion applications for lithium: wall conditioning in magnetic confinement devices},
author = {Kaita, Robert},
abstractNote = {The application of lithium to plasma facing components (PFCs) has been widely used to improve plasma performance in magnetic confinement devices. The ability of lithium to retain hydrogen isotopes has been exploited to lower wall recycling. Low recycling leads to high edge plasma temperatures, and decreased temperature gradients reduce the free energy source for microinstabilities that cause transport. A variety of techniques have been developed to introduce lithium into fusion research devices, and its beneficial effects have been observed in their plasmas. The mechanism for the retention of hydrogen isotopes has been elucidated by detailed surface science studies, and 'first principles' molecular dynamics simulations. The remaining challenges primarily pertain to long pulse operation. Our knowledge of erosion, transport, and redeposition needs to improve for the mixed material PFCs lithium creates. As a result, flowing liquid lithium systems also must be demonstrated for the replenishable lithium walls that fusion reactors require.},
doi = {10.1088/1361-6587/ab4156},
journal = {Plasma Physics and Controlled Fusion},
number = 11,
volume = 61,
place = {United States},
year = {2019},
month = {10}
}

Journal Article:
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