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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Behavior of Hydrogen and Nitrogen in Tungsten, as Divertor Wall of a Fusion Reactor
Author(s)
Sergio Beneitez1, Juana L. Gervasoni1, 2 and Juan Carlos Furnari3
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DOI:10.17265/1934-8975/2018.01.003
Affiliation(s)
1. Bariloche Atomic Center, CNEA (National Atomic Energy Commission), Bariloche 8400, Argentina
2. CONICET (National Council of Scientific and Technical Research), Argentina
3. Ezeiza Atomic Center, CNEA (National Atomic Energy Commission), Ezeiza 1802, Argentina
ABSTRACT
The
analysis of the interaction of hydrogen, nitrogen (and their isotopes) with
tungsten is important, since this material is a strong candidate to form the
first wall of fusion reactors for both magnetic and inertial confinement, and
these atoms have a very sensitive (desired and unwanted) interaction with it.
For this purpose, we study the effects and electronic state densities of atomic
hydrogen and nitrogen in pure tungsten, in order to analyze some important
properties such as the density of states of the system. Focusing on this
application, this work is a preliminary study of the behavior of atoms of
hydrogen and nitrogen, on a surface of tungsten on the three sites of the cell:
top, hollow and bridge. We use a program simulation based on the DFT (density
functional theory) implemented in the Open-Source Code Quantum Espresso, in
order to obtain the adsorption energy and the density of states of the systems.
KEYWORDS
Tungsten, electronic properties, fusion.
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