Development of laser induced breakdown spectroscopy for studying erosion, deposition, and fuel retention in ASDEX Upgrade

作者：Paris Peeter; Piip Kaarel; Hakola Antti; Laan Matti^*; Aints Maert; Koivuranta Seppo; Likonen Jari; Lissovski Aleksandr; Mayer Matej; Neu Rudolf; Rohde Volker; Sugiyama Kazuyoshi

来源：Fusion Engineering and Design, 2015, 98-99: 1349-1352.

DOI：10.1016/j.fusengdes.2015.03.004

• Plasma-facing components
• LIBS diagnostics
• Elemental depth profiles
• Fuel retention
• Data processing

The paper deals with the development of laser induced breakdown spectroscopy (LIBS) into an in situ method for studying erosion/deposition processes at the first walls of fusion reactors. To this end, samples extracted from the divertor tiles of ASDEX Upgrade after the 2009 plasma operations were analyzed using LIBS for their composition and the results were compared with other postmortem deposition data. Quantitative depth profiles for the elemental concentrations were extracted from LIBS spectra by applying a novel data processing method. In addition, both multiline and multispot averaging procedures were applied to reduce fluctuations in the data. The LIBS concentration profiles matched qualitatively with those given by secondary ion mass spectrometry and quantitatively with the ion-beam data. The deuterium content of the samples could be reliably determined if the surface densities were >10(17) at/cm(2).

• 出版日期2015-10