Crystallographic analysis of nano-tendril bundle vs fuzz growth on tungsten exposed to helicon wave-coupled helium plasma
Name
5.0027438.pdf
Description
Published version
Size
5.76 MB
Format
Unknown
Checksum (MD5)
17abb3241860bc9289a42bf2db9173eb
Author(s)
Woller, K. B.
Whyte, D. G.
Wright, G. M.
Date Issued
March 2021
Journal
Journal of Applied Physics
Publisher
AIP Publishing
Citation
Woller, KB, Whyte, DG and Wright, GM. 2021. "Crystallographic analysis of nano-tendril bundle vs fuzz growth on tungsten exposed to helicon wave-coupled helium plasma." Journal of Applied Physics, 129 (11).
Version
Final published version
Abstract
The propensity for nano-tendril bundle (NTB) vs widespread nano-tendril growth (i.e., fuzz) on polycrystalline W under varying ion energy modulation conditions, from DC to peak-to-peak energy modulation of 42 eV at 13.56 MHz, is correlated with the crystal orientation of the underlying grains. Grains that are vicinal to crystal orientations with high surface diffusivity (e.g., {101} for a body centered cubic crystal structure) exhibit NTB growth at lower ion energy modulation amplitude than grains that are vicinal to low surface diffusivity orientations, such as {100}. Adatom mobility considerations are presented to describe the experimental observations. These results support that surface diffusion or W adatom mobility enhanced by ion bombardment plays a key role in the surface morphology evolution of W under He irradiation.
MIT Department
Massachusetts Institute of Technology. Plasma Science and Fusion Center
Terms of Use
Creative Commons Attribution 4.0 International license
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DOI of Published Version
https://doi.org/10.1063/5.0027438
