Modeling the reduction of gross lithium erosion observed under high-flux deuterium bombardment

T. Abrams; M. A. Jaworski; R. Kaita; J. H. Nichols; D. P. Stotler; G. De Temmerman; M. A. Van Den Berg; H. J. Van Der Meiden; T. W. Morgan

doi:10.1016/j.jnucmat.2014.11.056

Modeling the reduction of gross lithium erosion observed under high-flux deuterium bombardment

T. Abrams
, M. A. Jaworski
, R. Kaita
, J. H. Nichols
, D. P. Stotler
, G. De Temmerman
, M. A. Van Den Berg
, H. J. Van Der Meiden
, T. W. Morgan

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

Abstract Both thin (<1 μm) and thick (∼500 μm) lithium films under high-flux deuterium and neon plasma bombardment were studied in the linear plasma device Magnum-PSI at ion fluxes >10²⁴ m^-2 s^-1 and surface temperatures <700 C. During Ne plasma exposures, Li erosion rates inferred from measurements of Li-I radiation exceed Langmuir Law evaporation, but no previous results exist to benchmark the binary collision approximation (BCA) and thermal sputtering measurements. Measured Li erosion rates during D plasma bombardment were compared to the adatom-evaporation model of thermal sputtering with an additional reduction term to account for the relative D/Li composition of the Li film. This model captures the qualitative evolution of the Li erosion yield but still overestimates the measured erosion by a factor of 5-10. This suggests that additional refinements to the mixed-material model are needed.

Original language	English
Article number	48650
Pages (from-to)	1169-1172
Number of pages	4
Journal	Journal of Nuclear Materials
Volume	463
DOIs	https://doi.org/10.1016/j.jnucmat.2014.11.056
State	Published - Jul 22 2015
Externally published	Yes

Funding

This work is supported by US DOE contract DE-AC02-09CH11466 and the US DOE Fusion Energy Sciences Fellowship . FOM authors are supported by the Stichting voor Fundamenteel Onderzoek der Materie (FOM) , which is financially supported by the Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO) .

Access to Document

10.1016/j.jnucmat.2014.11.056

Cite this

@article{c4d6431dcbd64e048e47a8d6763832d6,

title = "Modeling the reduction of gross lithium erosion observed under high-flux deuterium bombardment",

abstract = "Abstract Both thin (<1 μm) and thick (∼500 μm) lithium films under high-flux deuterium and neon plasma bombardment were studied in the linear plasma device Magnum-PSI at ion fluxes >1024 m-2 s-1 and surface temperatures <700 C. During Ne plasma exposures, Li erosion rates inferred from measurements of Li-I radiation exceed Langmuir Law evaporation, but no previous results exist to benchmark the binary collision approximation (BCA) and thermal sputtering measurements. Measured Li erosion rates during D plasma bombardment were compared to the adatom-evaporation model of thermal sputtering with an additional reduction term to account for the relative D/Li composition of the Li film. This model captures the qualitative evolution of the Li erosion yield but still overestimates the measured erosion by a factor of 5-10. This suggests that additional refinements to the mixed-material model are needed.",

author = "T. Abrams and Jaworski, \{M. A.\} and R. Kaita and Nichols, \{J. H.\} and Stotler, \{D. P.\} and \{De Temmerman\}, G. and \{Van Den Berg\}, \{M. A.\} and \{Van Der Meiden\}, \{H. J.\} and Morgan, \{T. W.\}",

note = "Publisher Copyright: {\textcopyright} 2014 Elsevier B.V.",

year = "2015",

month = jul,

day = "22",

doi = "10.1016/j.jnucmat.2014.11.056",

language = "English",

volume = "463",

pages = "1169--1172",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier",

}

TY - JOUR

T1 - Modeling the reduction of gross lithium erosion observed under high-flux deuterium bombardment

AU - Abrams, T.

AU - Jaworski, M. A.

AU - Kaita, R.

AU - Nichols, J. H.

AU - Stotler, D. P.

AU - De Temmerman, G.

AU - Van Den Berg, M. A.

AU - Van Der Meiden, H. J.

AU - Morgan, T. W.

PY - 2015/7/22

Y1 - 2015/7/22

N2 - Abstract Both thin (<1 μm) and thick (∼500 μm) lithium films under high-flux deuterium and neon plasma bombardment were studied in the linear plasma device Magnum-PSI at ion fluxes >1024 m-2 s-1 and surface temperatures <700 C. During Ne plasma exposures, Li erosion rates inferred from measurements of Li-I radiation exceed Langmuir Law evaporation, but no previous results exist to benchmark the binary collision approximation (BCA) and thermal sputtering measurements. Measured Li erosion rates during D plasma bombardment were compared to the adatom-evaporation model of thermal sputtering with an additional reduction term to account for the relative D/Li composition of the Li film. This model captures the qualitative evolution of the Li erosion yield but still overestimates the measured erosion by a factor of 5-10. This suggests that additional refinements to the mixed-material model are needed.

AB - Abstract Both thin (<1 μm) and thick (∼500 μm) lithium films under high-flux deuterium and neon plasma bombardment were studied in the linear plasma device Magnum-PSI at ion fluxes >1024 m-2 s-1 and surface temperatures <700 C. During Ne plasma exposures, Li erosion rates inferred from measurements of Li-I radiation exceed Langmuir Law evaporation, but no previous results exist to benchmark the binary collision approximation (BCA) and thermal sputtering measurements. Measured Li erosion rates during D plasma bombardment were compared to the adatom-evaporation model of thermal sputtering with an additional reduction term to account for the relative D/Li composition of the Li film. This model captures the qualitative evolution of the Li erosion yield but still overestimates the measured erosion by a factor of 5-10. This suggests that additional refinements to the mixed-material model are needed.

UR - https://www.scopus.com/pages/publications/84937628588

U2 - 10.1016/j.jnucmat.2014.11.056

DO - 10.1016/j.jnucmat.2014.11.056

M3 - Article

AN - SCOPUS:84937628588

SN - 0022-3115

VL - 463

SP - 1169

EP - 1172

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

M1 - 48650

ER -

Modeling the reduction of gross lithium erosion observed under high-flux deuterium bombardment

Abstract

Funding

Access to Document

Other files and links

Fingerprint

Cite this