Effect of random surface orientation on W sputtering yields

Research output: Contribution to journalArticleScientificpeer-review

Abstract

In this study, we investigate the sputtering yield of tungsten surfaces by energetic particles, focusing on the effect of surface orientation and the incoming irradiation angle, by means of molecular dynamics. We develop a simulation approach to simulate sputtering from completely random surface orientations. This allows obtaining the sputtering yields averaged over a sufficiently large number of orientations, to obtain statistically significant yields representative of a polycrystalline sample with random grain orientations. We find that the total sputtering yield is dependent on the surface orientation, and that the results for random surfaces are clearly different from that of any of the low-index ones or their average. The different low index surfaces and the random surfaces also showed that the sputtering yield is dependent on the incoming angle of the ion. The outgoing angle of the sputtered tungsten atoms was observed to be very sensitive to the surface orientation. Different features on the tungsten surface were observed to drastically affect the sputtering yield at certain angles.
Original languageEnglish
JournalNuclear materials and energy
Volume17
Pages (from-to)113-122
Number of pages10
ISSN2352-1791
DOIs
Publication statusPublished - Dec 2018
MoE publication typeA1 Journal article-refereed

Fields of Science

  • 114 Physical sciences

Cite this

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title = "Effect of random surface orientation on W sputtering yields",
abstract = "In this study, we investigate the sputtering yield of tungsten surfaces by energetic particles, focusing on the effect of surface orientation and the incoming irradiation angle, by means of molecular dynamics. We develop a simulation approach to simulate sputtering from completely random surface orientations. This allows obtaining the sputtering yields averaged over a sufficiently large number of orientations, to obtain statistically significant yields representative of a polycrystalline sample with random grain orientations. We find that the total sputtering yield is dependent on the surface orientation, and that the results for random surfaces are clearly different from that of any of the low-index ones or their average. The different low index surfaces and the random surfaces also showed that the sputtering yield is dependent on the incoming angle of the ion. The outgoing angle of the sputtered tungsten atoms was observed to be very sensitive to the surface orientation. Different features on the tungsten surface were observed to drastically affect the sputtering yield at certain angles.",
keywords = "114 Physical sciences",
author = "J. Jussila and F. Granberg and K. Nordlund",
year = "2018",
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doi = "10.1016/j.nme.2018.08.002",
language = "English",
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publisher = "Elsevier Ltd.",

}

Effect of random surface orientation on W sputtering yields. / Jussila, J.; Granberg, F.; Nordlund, K.

In: Nuclear materials and energy, Vol. 17, 12.2018, p. 113-122.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Effect of random surface orientation on W sputtering yields

AU - Jussila, J.

AU - Granberg, F.

AU - Nordlund, K.

PY - 2018/12

Y1 - 2018/12

N2 - In this study, we investigate the sputtering yield of tungsten surfaces by energetic particles, focusing on the effect of surface orientation and the incoming irradiation angle, by means of molecular dynamics. We develop a simulation approach to simulate sputtering from completely random surface orientations. This allows obtaining the sputtering yields averaged over a sufficiently large number of orientations, to obtain statistically significant yields representative of a polycrystalline sample with random grain orientations. We find that the total sputtering yield is dependent on the surface orientation, and that the results for random surfaces are clearly different from that of any of the low-index ones or their average. The different low index surfaces and the random surfaces also showed that the sputtering yield is dependent on the incoming angle of the ion. The outgoing angle of the sputtered tungsten atoms was observed to be very sensitive to the surface orientation. Different features on the tungsten surface were observed to drastically affect the sputtering yield at certain angles.

AB - In this study, we investigate the sputtering yield of tungsten surfaces by energetic particles, focusing on the effect of surface orientation and the incoming irradiation angle, by means of molecular dynamics. We develop a simulation approach to simulate sputtering from completely random surface orientations. This allows obtaining the sputtering yields averaged over a sufficiently large number of orientations, to obtain statistically significant yields representative of a polycrystalline sample with random grain orientations. We find that the total sputtering yield is dependent on the surface orientation, and that the results for random surfaces are clearly different from that of any of the low-index ones or their average. The different low index surfaces and the random surfaces also showed that the sputtering yield is dependent on the incoming angle of the ion. The outgoing angle of the sputtered tungsten atoms was observed to be very sensitive to the surface orientation. Different features on the tungsten surface were observed to drastically affect the sputtering yield at certain angles.

KW - 114 Physical sciences

U2 - 10.1016/j.nme.2018.08.002

DO - 10.1016/j.nme.2018.08.002

M3 - Article

VL - 17

SP - 113

EP - 122

JO - Nuclear materials and energy

JF - Nuclear materials and energy

SN - 2352-1791

ER -