Activities per year
Abstract
Future fusion reactors use a D–T plasma mixture as fuel. A fraction of hydrogen species can escape the plasma confinement and hit the first wall. Hydrogen isotope exchange, a process in which trapped T atoms are replaced with lighter hydrogen isotopes D or H, is a potential method to minimize radioactive T retention in the wall materials. The present work extends our systematic research on isotope exchange by reversing the process, i.e. by implanting H ions into tungsten followed by subsequent annealing at different constant temperatures in D2 atmosphere. Elastic Recoil Detection Analysis was used to determine the H and D concentrations. The results show that the isotope exchange process takes place regardless of the mass of the active hydrogen isotope. This indicates that the isotope exchange is a statistical phenomenon in which the abundance of the neighboring hydrogen near the trapped hydrogen isotope defines the efficiency of the process.
Original language | English |
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Article number | 014056 |
Journal | Physica Scripta |
Volume | T171 |
Issue number | 1 |
Number of pages | 4 |
DOIs | |
Publication status | Published - 1 Jan 2020 |
MoE publication type | A1 Journal article-refereed |
Fields of Science
- 114 Physical sciences
- isotope exchange
- retention
- fusion
- tungsten
- ion beam analysis
- annealing
- DEUTERIUM
Activities
- 1 Organisation and participation in conferences, workshops, courses, seminars
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17th International Conference on Plasma-Facing Materials and Components for Fusion Applications
Tomi Vuoriheimo (Attendee)
20 May 2019 → 24 May 2019Activity: Participating in or organising an event types › Organisation and participation in conferences, workshops, courses, seminars