Fuel retention measurements in Alcator C-Mod using accelerator-based in situ materials surveillance
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Whyte_Fuel retention.pdf
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Author(s)
Lipschultz, Bruce
Hartwig, Zachary Seth
Barnard, Harold Salvadore
Sorbom, Brandon Nils
Lanza, Richard C
Stahle, Peter W
Whyte, Dennis G
Date Issued
September 2014
Journal
Journal of Nuclear Materials
Publisher
Elsevier
Citation
Hartwig, Zachary S. et al. “Fuel Retention Measurements in Alcator C-Mod Using Accelerator-Based in Situ Materials Surveillance.” Journal of Nuclear Materials 463 (August 2015): 73–77 © 2014 Elsevier B.V.
Version
Author's final manuscript
Abstract
This paper presents the first in situ time- and space-resolved measurements of deuterium (D) fuel retention in plasma-facing component (PFC) surfaces using Accelerator-based In-situ Materials Surveillance (AIMS) on the Alcator C-Mod tokamak. AIMS is a novel in situ materials diagnostic technique based on the spectroscopic analysis of nuclear reaction products induced in PFC surfaces using an ∼MeV beam of deuterons from a compact linear accelerator in between plasma shots. AIMS measurements of D retention on inner wall PFCs were acquired during diverted and limited plasma operations and during wall conditioning experiments. Intershot measurements demonstrate the local erosion and codeposition of boron films on PFC surfaces with a constant ratio D/B. This is consistent with previous results suggesting that D codeposition with boron is insufficient to account for the net retention observed in Alcator C-Mod. Changes in deuterium concentration during boronization, electron cyclotron and glow cleanings were also measured.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Plasma Science and Fusion Center
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Creative Commons Attribution-NonCommercial-NoDerivs License
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DOI of Published Version
https://doi.org/10.1016/j.jnucmat.2014.09.056
