About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials Systems for the Future of Fusion Energy
|
Presentation Title |
Evaluating the Temperature Dependence of Bubble Bursting Rate for Low Energy Helium Plasma-exposed Tungsten |
Author(s) |
Yogendra Singh Panchal, Sophie Blondel, Dwaipayan Dasgupta, Robert D Kolasinski, Brian D Wirth |
On-Site Speaker (Planned) |
Yogendra Singh Panchal |
Abstract Scope |
This work builds upon a bubble bursting model [Blondel et al. 2018, Nuclear Fusion 58, 126034] in Xolotl, a cluster dynamics code for simulating plasma surface interactions in tungsten in a burning plasma fusion environment. In the original bursting model, helium release from over-pressurized bubbles is based on a probability - dependent on bubble size and distance to the surface. This model predicts helium retention behavior that is in quantitative agreement with high implantation flux molecular dynamics (MD) simulations, although the size and depth distribution of bursting has discrepancies with MD. A systematic comparison of Xolotl predictions with a large MD database has led to an improved bursting model, as described in the presentation. Subsequently, the improved model is compared with a set of linear plasma exposure experiments and surface characterization to evaluate the efficacy of the model, and in particular, the temperature dependence of bubble bursting. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, Nuclear Materials, Other |