Recoil energy distribution of hydrogen isotopes adsorbed on tungsten.
Journal Article
·
· Proposed for publication in Journal of Nuclear Materials.
OSTI ID:964573
The energies of adsorbed H and D recoiled from tungsten surfaces during bombardment with 3 keV Ne{sup +} at oblique angles of incidence were measured. The energy spectra show structure that extends above the elastic recoil energy. We find that the high-energy structure results from multiple collisions, namely recoil of a H isotope followed by scattering from an adjacent W atom, and vice versa. This scattering assisted recoil process is especially prevalent for H isotopes adsorbed on W, owing to the large mass difference between the scattering partners. Such processes will tend to enhance H isotope recycling from plasma-facing W surfaces and reduce energy transfer to the W substrate.
- Research Organization:
- Sandia National Laboratories
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 964573
- Report Number(s):
- SAND2004-3250J
- Journal Information:
- Proposed for publication in Journal of Nuclear Materials., Journal Name: Proposed for publication in Journal of Nuclear Materials.
- Country of Publication:
- United States
- Language:
- English
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