Abstract

Laser-Induced Breakdown Spectroscopy (LIBS) is a promising technology for in-situ analysis of Plasma-Facing Components in magnetic confinement fusion facilities. It is of major interest to monitor the hydrogen isotope retention i.e. tritium and deuterium over many operation hours to guarantee safety and availability of the future reactor. In our studies we use ultraviolet femtosecond laser pulses to analyze tungsten (W) tiles that were exposed to a deuterium plasma in the linear plasma device PSI-2, which mimics conditions at the first wall. A high-resolution spectrometer is used to detect the Balmer-α transition of the surface from implanted hydrogen isotopes (H and D). We use Calibration Free CF-LIBS to quantify the amount of deuterium stored in W. This proof-of-principle study shows the applicability of femtosecond lasers for the detection of low deuterium concentration as present in first wall material of prevailing fusion experiments.

Details

Title
Hydrogen isotope analysis in W-tiles using fs-LIBS
Author
Mittelmann, Steffen 1 ; Touchet, Kévin 2 ; Mao, Xianglei 2 ; Park, Minok 2 ; Brezinsek, Sebastijan 3 ; Pretzler, Georg 1 ; Zorba, Vassilia 4 

 Heinrich-Heine University Düsseldorf, Institute of Laser and Plasma Physics, Düsseldorf, Germany (GRID:grid.411327.2) (ISNI:0000 0001 2176 9917) 
 Lawrence Berkeley National Laboratory, Laser Technologies Group, Berkeley, USA (GRID:grid.184769.5) (ISNI:0000 0001 2231 4551) 
 Forschungszentrum Jülich GmbH IEK-4 Plasmaphysik, Jülich, Germany (GRID:grid.8385.6) (ISNI:0000 0001 2297 375X) 
 Lawrence Berkeley National Laboratory, Laser Technologies Group, Berkeley, USA (GRID:grid.184769.5) (ISNI:0000 0001 2231 4551); University of California at Berkeley, Department of Mechanical Engineering, Berkeley, USA (GRID:grid.47840.3f) (ISNI:0000 0001 2181 7878) 
Pages
2285
Publication year
2023
Publication date
2023
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2774729701
Copyright
© The Author(s) 2023. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.