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 13.56MHz. Helium ion energy distributions with a span of 70–75eV, while still below the sputtering threshold result in nano-tendril bundles (NTBs) and free-standin...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2017-08-01
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| Series: | Nuclear Materials and Energy |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352179116302241 |
| _version_ | 1819090269649240064 |
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| author | Kevin B. Woller Dennis G. Whyte Graham M. Wright |
| author_facet | Kevin B. Woller Dennis G. Whyte Graham M. Wright |
| author_sort | Kevin B. Woller |
| collection | DOAJ |
| 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 13.56MHz. Helium ion energy distributions with a span of 70–75eV, while still below the sputtering threshold result in nano-tendril bundles (NTBs) and free-standing W whiskers on surfaces at 1020K. The NTBs are distributed intragranularly with coverage of less than 10% while reaching up to 30µm 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 | 2024-12-21T22:21:09Z |
| format | Article |
| id | doaj.art-e926dd03d45e47ca82a78b60a230745f |
| institution | Directory Open Access Journal |
| issn | 2352-1791 |
| language | English |
| last_indexed | 2024-12-21T22:21:09Z |
| publishDate | 2017-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Materials and Energy |
| spelling | doaj.art-e926dd03d45e47ca82a78b60a230745f2022-12-21T18:48:20ZengElsevierNuclear Materials and Energy2352-17912017-08-011212821287Isolated nano-tendril bundles on tungsten surfaces exposed to radiofrequency helium plasmaKevin B. Woller0Dennis G. Whyte1Graham M. Wright2Corresponding author.; MIT Plasma Science and Fusion Center MIT, 175 Albany St., Cambridge, MA, USA, 02139MIT Plasma Science and Fusion Center MIT, 175 Albany St., Cambridge, MA, USA, 02139MIT Plasma Science and Fusion Center MIT, 175 Albany St., Cambridge, MA, USA, 02139The DIONISOS experiment is used to study the impact of RF helium (He) plasma on the surface morphology of tungsten (W) at a frequency of 13.56MHz. Helium ion energy distributions with a span of 70–75eV, while still below the sputtering threshold result in nano-tendril bundles (NTBs) and free-standing W whiskers on surfaces at 1020K. The NTBs are distributed intragranularly with coverage of less than 10% while reaching up to 30µm 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 sheathhttp://www.sciencedirect.com/science/article/pii/S2352179116302241 |
| spellingShingle | Kevin B. Woller Dennis G. Whyte Graham M. Wright Isolated nano-tendril bundles on tungsten surfaces exposed to radiofrequency helium plasma Nuclear Materials and Energy |
| 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://www.sciencedirect.com/science/article/pii/S2352179116302241 |
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