LIA-QMS method for the quantity analysis of the hydrogen isotopes retention in first-wall components of Globus-M2 tokamak

IF 2.3 2区物理与天体物理 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Nuclear Materials and Energy Pub Date : 2024-12-01 DOI:10.1016/j.nme.2024.101829

O.S. Medvedev , A.G. Razdobarin , E.V. Shubina (Smirnova) , M.V. Grishaev , D.I. Elets , L.A. Snigirev , A.S. Kolomiytsev , A.V. Nikolaev

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Abstract

The technique based on quadrupole mass spectrometry of the material ejected by laser-induced ablation – LIA-QMS is proposed as a tool to measure H/D/T content in carbon co-deposits in the first wall and divertor regions of tokamak reactors. Tungsten tiles exposed in Globus-M2 tokamak were taken for validation experiments. Measurement accuracy was determined by comparison with the results obtained by laser-induced desorption – LID-QMS and conventional thermal desorption spectroscopy (TDS). Total amount of deuterium in hydrocarbon deposits was found to be 2.8 × 10¹⁷ D/cm², when measured by – LIA-QMS, 3.0 × 10¹⁷ D/cm² for LID-QMS and 2.9 × 10¹⁷ D/cm² for TDS. The main uncertainty of D surface concentration are caused by inhomogeneity of the deposit thickness over the sample area or by presence of hydrocarbon species in the released gas.

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用LIA-QMS方法定量分析Globus-M2托卡马克第一壁组分中氢同位素的保留

提出了一种基于激光诱导烧蚀喷射材料四极杆质谱技术- LIA-QMS，作为测量托卡马克反应堆第一壁和分流区碳共沉积中H/D/T含量的工具。采用Globus-M2托卡马克中暴露的钨瓦进行验证实验。通过与激光诱导解吸- LID-QMS和传统热解吸光谱（TDS）测量结果的比较，确定了测量精度。用- LIA-QMS测定烃类沉积物中氘的总量为2.8 × 1017 D/cm2，用LID-QMS测定为3.0 × 1017 D/cm2，用TDS测定为2.9 × 1017 D/cm2。D表面浓度的主要不确定度是由样品区域上沉积物厚度的不均匀性或释放气体中碳氢化合物的存在引起的。

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来源期刊

Nuclear Materials and Energy Materials Science-Materials Science (miscellaneous)

CiteScore

3.70

自引率

15.40%

发文量

175

审稿时长

20 weeks

期刊介绍： The open-access journal Nuclear Materials and Energy is devoted to the growing field of research for material application in the production of nuclear energy. Nuclear Materials and Energy publishes original research articles of up to 6 pages in length.