Bulletin of the American Physical Society
65th Annual Meeting of the APS Division of Plasma Physics
Monday–Friday, October 30–November 3 2023; Denver, Colorado
Session GP11: Poster Session III:
LTP: Measurement, analysis and control of low temperature plasmas
Fundamental: Waves, instabilities, and turbulence
MFE: Stellarators: W7-X, LHD, HSX, CTH, Others; Divertor physics
9:30 AM - 12:30 PM
Tuesday, October 31, 2023
Room: Plaza ABC
Abstract: GP11.00143 : Influences of Porosity on Hydrogen Diffusion and Retention in Lithiated Porous Tungsten*
Presenter:
Camila Lopez Perez
(Pennsylvania State University)
Authors:
Camila Lopez Perez
(Pennsylvania State University)
Martin Nieto-Pérez
(Pennsylvania State University)
Kevin B Woller
(Massachusetts Institute of Technology)
Logan Webber
(Massachusetts Institute of Technology)
Studies on the diffusion and retention of hydrogen in hybrid liquid Li- porous tungsten substrates are being performed at the DIONISOS experiment at MIT. Lithiated porous tungsten samples made by spark plasma sintering are irradiated with deuterium using a fluence of 1024/m2 at solid (room temperature) and liquid (200° C) states. Virgin porous tungsten samples (e.g. without Li) are used as controls (room temperature and T = 200°C) to compare D diffusion in porous W with and without Li. Furthermore, highly dense tungsten samples with the same temperature and lithium parameters as the porous W samples are also used as controls to investigate the effects of the samples’ bulk morphology on the D diffusivity. In-situ Ion Beam Analisis (IBA) is then used to obtain information on the depth distribution of deuterium in the samples. After IBA measurements, In-situ mass spectrometry is performed using a Residual Gas Analyzer (RGA) to quantify the deuterium retained in the samples. Results will be discussed in the context of how deuterium is retained and is diffusing through the samples, and how the porous morphology of the samples affects this dynamic.
*DOE Contract DE-SC0021119
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