4.6 Article

Double pulse laser-induced breakdown spectroscopy for the analysis of plasma-facing components

Journal

PHYSICA SCRIPTA
Volume 96, Issue 12, Pages -

Publisher

IOP Publishing Ltd
DOI: 10.1088/1402-4896/ac379c

Keywords

double pulse laser-induced breakdown spectroscopy; plasma-facing components; fuel retention; laser based diagnostics

Funding

  1. Euratom research and training programme [633053]

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This study introduces two setups with different laser pulse properties and excitation geometries for post-mortem plasma-facing component analyses. Compared to single pulse, double pulse laser-induced breakdown spectroscopy shows enhancement factors and changes in spectral line shapes.
Laser-induced breakdown spectroscopy is applied successfully for plasma-wall interaction studies in several fusion devices and post-mortem analyses of plasma-facing materials. However, the quantitative as well as qualitative analysis of low hydrogen isotope contents in tungsten plasma-facing components is still challenging. A promising approach to increase the optical signal in laser-induced breakdown spectroscopy is to apply a second laser pulse to the laser-produced plasma. We present two setups for post mortem plasma-facing component analyses using different laser pulse properties and different excitation geometries. The enhancement factors and changes in spectral line shapes for double pulse compared to single pulse laser-induced breakdown spectroscopy are presented.

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