Observation of increased nanostructure cone growth on Cr due to grazing-incidence Ta seed atom deposition in a He plasma

Hollmann, E. M.; Nishijima, D.; Patino, M. I.; Chrobak, C.; Doerner, R. P.; Nagata, D.; Tokitani, M.

doi:10.1063/1.5110298

Title: Observation of increased nanostructure cone growth on Cr due to grazing-incidence Ta seed atom deposition in a He plasma

Journal Article · Thu Aug 15 00:00:00 EDT 2019 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.5110298· OSTI ID:1609937

^[1]; Nishijima, D. ^[1]; Patino, M. I. ^[1]; Chrobak, C. ^[2]; Doerner, R. P. ^[1]; Nagata, D. ^[3]; Tokitani, M. ^[3]

Univ. of California, San Diego, CA (United States)
General Atomics, San Diego, CA (United States)
National Inst. for Fusion Science, Toki (Japan)

Nanostructure cone growth on chromium during helium plasma exposure in the PISCES-A linear plasma device is found to increase with the deposition of heavy tantalum atoms. Tantalum is found to be especially effective at increasing cone growth if the tantalum is incident on the surface at a grazing angle (~5° or less). Tantalum atoms at grazing incidence are observed to be dominantly deposited at the cone tips, consistent with reduced sputtering of the cone tips and increased cone growth. Monte-Carlo simulations are found to be qualitatively consistent with the experimental observation that grazing-incidence heavy atom deposition on a lighter substrate will tend to increase cone growth.

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Research Organization:: Univ. of California, San Diego, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: FG02-07ER54912

OSTI ID:: 1609937

Journal Information:: Journal of Applied Physics, Vol. 126, Issue 7; ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 1 work

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References (31)

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