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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) at a frequency of 13.56 MHz. Helium ion energy distributions with a span of 70–75 eV, while still below the sputtering threshold result in nano-tendril bundles (NTBs) and free-standing W whiskers on surfaces at 1020 K. The NTBs are distributed intragranularly with coverage of less than 10% while reaching up to 30 µm normal to the surface for He ion fluence of 7.6 × 1025 m-2 and flux density of 1022 m-2 s-1. Analysis of the NTB interior and sub-surface structure is provided through focused ion beam cross section.

Authors:
; ;
Publication Date:
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES)
OSTI Identifier:
1356714
Alternate Identifier(s):
OSTI ID: 1534189
Grant/Contract Number:  
FC02-99ER54512; SC00-02060; DMR-08-19762; SC0002060
Resource Type:
Published Article
Journal Name:
Nuclear Materials and Energy
Additional Journal Information:
Journal Name: Nuclear Materials and Energy Journal Volume: 12 Journal Issue: C; Journal ID: ISSN 2352-1791
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English
Subject:
36 MATERIALS SCIENCE; tungsten fuzz; helium; nano-tendril; RF sheath

Citation Formats

Woller, Kevin B., Whyte, Dennis G., and Wright, Graham M. Isolated nano-tendril bundles on tungsten surfaces exposed to radiofrequency helium plasma. Netherlands: N. p., 2017. Web. doi:10.1016/j.nme.2017.04.016.
Woller, Kevin B., Whyte, Dennis G., & Wright, Graham M. Isolated nano-tendril bundles on tungsten surfaces exposed to radiofrequency helium plasma. Netherlands. https://doi.org/10.1016/j.nme.2017.04.016
Woller, Kevin B., Whyte, Dennis G., and Wright, Graham M. Tue . "Isolated nano-tendril bundles on tungsten surfaces exposed to radiofrequency helium plasma". Netherlands. https://doi.org/10.1016/j.nme.2017.04.016.
@article{osti_1356714,
title = {Isolated nano-tendril bundles on tungsten surfaces exposed to radiofrequency helium plasma},
author = {Woller, Kevin B. and Whyte, Dennis G. and Wright, Graham M.},
abstractNote = {The DIONISOS experiment is used to study the impact of RF helium (He) plasma on the surface morphology of tungsten (W) at a frequency of 13.56 MHz. Helium ion energy distributions with a span of 70–75 eV, while still below the sputtering threshold result in nano-tendril bundles (NTBs) and free-standing W whiskers on surfaces at 1020 K. The NTBs are distributed intragranularly with coverage of less than 10% while reaching up to 30 µm normal to the surface for He ion fluence of 7.6 × 1025 m-2 and flux density of 1022 m-2 s-1. Analysis of the NTB interior and sub-surface structure is provided through focused ion beam cross section.},
doi = {10.1016/j.nme.2017.04.016},
journal = {Nuclear Materials and Energy},
number = C,
volume = 12,
place = {Netherlands},
year = {Tue Aug 01 00:00:00 EDT 2017},
month = {Tue Aug 01 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1016/j.nme.2017.04.016

Citation Metrics:
Cited by: 13 works
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