Surface chemistry and physics of deuterium retention in lithiated graphite

C. N. Taylor, Jean Paul Allain, B. Heim, P. S. Krstic, C. H. Skinner, H. W. Kugel

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Lithium wall conditioning in TFTR, CDX-U, T-11M, TJ-II and NSTX is found to yield enhanced plasma performance manifest, in part, through improved deuterium particle control. X-ray photoelectron spectroscopy (XPS) experiments examine the affect of D irradiation on lithiated graphite and show that the surface chemistry of lithiated graphite after D ion bombardment (500 eV/amu) is fundamentally different from that of non-Li conditioned graphite. Instead of simple LiD bonding seen in pure liquid Li, graphite introduces additional complexities. XPS spectra show that Li-O-D (533.0 ± 0.6 eV) and Li-C-D (291.4 ± 0.6 eV) bonds, for a nominal Li dose of 2 μm, become "saturated" with D at fluences between 3.8 and 5.2 × 10 17 cm-2. Atomistic modeling indicate that Li-O-D-C interactions may be a result of multibody effects as opposed to molecular bonding.

Original languageEnglish (US)
JournalJournal of Nuclear Materials
Volume415
Issue number1 SUPPL
DOIs
StatePublished - Aug 1 2011

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Graphite
Deuterium
Surface chemistry
deuterium
Physics
graphite
chemistry
physics
X ray photoelectron spectroscopy
photoelectron spectroscopy
conditioning
Ion bombardment
Lithium
bombardment
fluence
x rays
lithium
Irradiation
Plasmas
dosage

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Materials Science(all)

Cite this

Taylor, C. N. ; Allain, Jean Paul ; Heim, B. ; Krstic, P. S. ; Skinner, C. H. ; Kugel, H. W. / Surface chemistry and physics of deuterium retention in lithiated graphite. In: Journal of Nuclear Materials. 2011 ; Vol. 415, No. 1 SUPPL.
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Surface chemistry and physics of deuterium retention in lithiated graphite. / Taylor, C. N.; Allain, Jean Paul; Heim, B.; Krstic, P. S.; Skinner, C. H.; Kugel, H. W.

In: Journal of Nuclear Materials, Vol. 415, No. 1 SUPPL, 01.08.2011.

Research output: Contribution to journalArticle

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AU - Taylor, C. N.

AU - Allain, Jean Paul

AU - Heim, B.

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AU - Kugel, H. W.

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