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Title: Isolated nano-tendril bundles on tungsten surfaces exposed to radiofrequency helium plasma

Abstract

The DIONISOS experiment is used to study the impact of RF helium (He) plasma on the surface morphology of tungsten (W). Modulation of incident He ion energy with a span on the order of 50 eV and below the sputtering threshold at a frequency of 13.56 MHz results in nano-tendril bundles (NTBs) and free-standing W whiskers on the surface at 1020 K. The NTBs are distributed intra-granularly with coverage of less than 10% while reaching up to 30 microns normal to the surface for He ion fluence of 5.8 x 10^25 m^-2 and a flux density of 1.0 x 10^22 m^-2 s^-1. Analysis of the NTB interior and sub-surface structure is provided through focused ion beam cross section.

Authors:
; ;
Publication Date:
DOE Contract Number:  
SC0002060
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES)
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1881217
DOI:
https://doi.org/10.7910/DVN/TLXCDQ

Citation Formats

Woller, Kevin, Whyte, Dennis, and Wright, Graham. Isolated nano-tendril bundles on tungsten surfaces exposed to radiofrequency helium plasma. United States: N. p., 2019. Web. doi:10.7910/DVN/TLXCDQ.
Woller, Kevin, Whyte, Dennis, & Wright, Graham. Isolated nano-tendril bundles on tungsten surfaces exposed to radiofrequency helium plasma. United States. doi:https://doi.org/10.7910/DVN/TLXCDQ
Woller, Kevin, Whyte, Dennis, and Wright, Graham. 2019. "Isolated nano-tendril bundles on tungsten surfaces exposed to radiofrequency helium plasma". United States. doi:https://doi.org/10.7910/DVN/TLXCDQ. https://www.osti.gov/servlets/purl/1881217. Pub date:Fri Jan 11 00:00:00 EST 2019
@article{osti_1881217,
title = {Isolated nano-tendril bundles on tungsten surfaces exposed to radiofrequency helium plasma},
author = {Woller, Kevin and Whyte, Dennis and Wright, Graham},
abstractNote = {The DIONISOS experiment is used to study the impact of RF helium (He) plasma on the surface morphology of tungsten (W). Modulation of incident He ion energy with a span on the order of 50 eV and below the sputtering threshold at a frequency of 13.56 MHz results in nano-tendril bundles (NTBs) and free-standing W whiskers on the surface at 1020 K. The NTBs are distributed intra-granularly with coverage of less than 10% while reaching up to 30 microns normal to the surface for He ion fluence of 5.8 x 10^25 m^-2 and a flux density of 1.0 x 10^22 m^-2 s^-1. Analysis of the NTB interior and sub-surface structure is provided through focused ion beam cross section.},
doi = {10.7910/DVN/TLXCDQ},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {1}
}

Works referencing / citing this record:

Isolated nano-tendril bundles on tungsten surfaces exposed to radiofrequency helium plasma
journal, August 2017