Greifswald 2024 – scientific programme
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P: Fachverband Plasmaphysik
P 22: Plasma Wall Interaction II/HEPP VII
P 22.1: Invited Talk
Thursday, February 29, 2024, 14:00–14:30, ELP 6: HS 4
First Results of Laser-Induced Desorption - Quadrupole Mass Spectrometry (LID-QMS) at JET — •Miroslaw Zlobinski1, Gennady Sergienko1, Ionut Jepu2,3, and et al2 — 1Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany — 2United Kingdom Atomic Energy Authority, Culham Centre for Fusion Energy, Culham Science Centre, OX14 3DB Abingdon, UK — 3National Institute for Laser, Plasma and Radiation Physics, Magurele, Romania
Monitoring the tritium retention at the walls of fusion devices is important due to radiation safety, the fuel cycle and material degradation. In 2023 a new fuel retention diagnostic has been installed on JET and the first results are presented here. LID-QMS allows direct in situ measurements of the fuel inventory of plasma facing components. The diagnostic desorbs the retained gases by heating a 3 mm diameter spot on the wall using a 1 ms long laser pulse and detects them by Quadrupole Mass Spectrometry (QMS). The successful detection of tritium retention in the tritium campaign at JET has been demonstrated. Thus, this diagnostic is already foreseen as tritium monitor diagnostic for ITER.
Keywords: Fuel Retention; Desorption; Tritium; Laser Diagnostic; JET