Isolated nano-tendril bundles on tungsten surfaces exposed to radiofrequency helium plasma
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-stand...
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| Format: | Article |
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Elsevier BV
2018
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| Online Access: | http://hdl.handle.net/1721.1/117086 https://orcid.org/0000-0002-0450-9731 https://orcid.org/0000-0002-9001-5606 |
| _version_ | 1811087558047694848 |
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| author | Woller, Kevin Benjamin Whyte, Dennis G Wright, Graham |
| author2 | Massachusetts Institute of Technology. Plasma Science and Fusion Center |
| author_facet | Massachusetts Institute of Technology. Plasma Science and Fusion Center Woller, Kevin Benjamin Whyte, Dennis G Wright, Graham |
| author_sort | Woller, Kevin Benjamin |
| collection | MIT |
| description | 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 × 10²⁵m⁻² and flux density of 10²²m⁻²s⁻¹. Analysis of the NTB interior and sub-surface structure is provided through focused ion beam cross section. Keywords: Tungsten fuzz; Helium; Nano-tendril; RF sheath |
| first_indexed | 2024-09-23T13:47:59Z |
| format | Article |
| id | mit-1721.1/117086 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T13:47:59Z |
| publishDate | 2018 |
| publisher | Elsevier BV |
| record_format | dspace |
| spelling | mit-1721.1/1170862022-09-28T16:19:10Z Isolated nano-tendril bundles on tungsten surfaces exposed to radiofrequency helium plasma Woller, Kevin Benjamin Whyte, Dennis G Wright, Graham Massachusetts Institute of Technology. Plasma Science and Fusion Center Woller, Kevin Benjamin Whyte, Dennis G Wright, Graham 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 × 10²⁵m⁻² and flux density of 10²²m⁻²s⁻¹. Analysis of the NTB interior and sub-surface structure is provided through focused ion beam cross section. Keywords: Tungsten fuzz; Helium; Nano-tendril; RF sheath United States. Department of Energy (Award DE-SC00-02060) United States. Department of Energy (Grant DE-FC02-99ER54512) 2018-07-24T17:37:12Z 2018-07-24T17:37:12Z 2017-05 2017-04 2018-07-20T17:41:10Z Article http://purl.org/eprint/type/JournalArticle 2352-1791 http://hdl.handle.net/1721.1/117086 Woller, Kevin B. et al. “Isolated Nano-Tendril Bundles on Tungsten Surfaces Exposed to Radiofrequency Helium Plasma.” Nuclear Materials and Energy 12 (August 2017): 1282–1287 © 2017 The Authors https://orcid.org/0000-0002-0450-9731 https://orcid.org/0000-0002-9001-5606 http://dx.doi.org/10.1016/J.NME.2017.04.016 Nuclear Materials and Energy Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf Elsevier BV Elsevier |
| spellingShingle | Woller, Kevin Benjamin Whyte, Dennis G Wright, Graham Isolated nano-tendril bundles on tungsten surfaces exposed to radiofrequency helium plasma |
| title | Isolated nano-tendril bundles on tungsten surfaces exposed to radiofrequency helium plasma |
| title_full | Isolated nano-tendril bundles on tungsten surfaces exposed to radiofrequency helium plasma |
| title_fullStr | Isolated nano-tendril bundles on tungsten surfaces exposed to radiofrequency helium plasma |
| title_full_unstemmed | Isolated nano-tendril bundles on tungsten surfaces exposed to radiofrequency helium plasma |
| title_short | Isolated nano-tendril bundles on tungsten surfaces exposed to radiofrequency helium plasma |
| title_sort | isolated nano tendril bundles on tungsten surfaces exposed to radiofrequency helium plasma |
| url | http://hdl.handle.net/1721.1/117086 https://orcid.org/0000-0002-0450-9731 https://orcid.org/0000-0002-9001-5606 |
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