Investigation of laser ablation features of molybdenum bulk for picosecond laser-based techniques in fusion devices

3-Dimensional analysis of layer structured samples with high depth resolution using picosecond laser-induced breakdown spectroscopy

“…Therefore, a picosecond-LIBS (ps-LIBS) is introduced to do the depth analysis. Compared with fs-LIBS, materials can be ablated without thermal effects by ps-LIBS as well [20,21], while a higher laser energy can be used to achieve stronger spectral intensity.…”

Laser-induced ablation of tantalum in a wide range of pulse durations

“…A similar dependence can be observed with respect to a threshold intensity I th as Note that −1 is a numerical fitting parameter that has the meaning of an effective penetration depth from the observed material. In the ps-to fs-pulse duration regime, this parameter can be set to the optical penetration depth −1 as carried out in [23] for the case of a molybdenum target. The logarithmic dependence presented in Eqs.…”

Atomic spectrometry update: review of advances in the analysis of metals, chemicals and materials

“…The diversity of the applications of atomic spectrometry was once again evident in the review period, with studies ranging from the analysis of high-purity germanium oxide semiconductor material 140 to a review of heavy metals in children's chalk sticks in China. 141 The former utilised the reactivity, and subsequent volatility, of Ge and chlorine gas to remove matrix interference by distillation of GeCl 4 at 120 C. Nguyen et al reported a simple separation system for the elimination of polyatomic interferences encountered during the determination of ultra-trace rare earth elements (REE) in high-purity Eu 2 O 3 and Yb 2 O 3 using ICP-MS. 142 Whilst many REE impurities could be determined with a standard ICP-MS setup, monoisotopic 169 Tm + and the most abundant 175 Lu + isotope suffered from signicant interference from 153 Eu 16 O + and 174 YbH + ions formed in the plasma. Interference removal was achieved using chromatographic separation of the high concentration of matrix elements by reverse-phase HPLC using a C18-silica column impregnated with 2-ethylhexyl, 2-ethylhexyl phosphonic acid and a dilute HNO 3 mobile phase.…”

“…Plasma shielding from strong laser absorption and reduced ablation rates with increased laser power density were the explanations given for multi-charged ion origins. Picosecond laser-based techniques were used to study the ablation features of Mo by Zhao et al 175 Confocal microscopy was used to determine the ablation depth and morphology, with FIB-SEM assessing the craters structural features, leading to information on ablation threshold, depth resolution and minimum depth of bulk Mo. The paper went on to discuss the application of picosecond laser-based techniques for current and future fusion devices.…”