Doppler splitting and expansion dynamics of laser-produced plasma plume under a high vacuum ambience

Kuwahara, Akira; Murakami, Kenta; Tomita, Hideki; Sawada, Kayo; Enokida, Youichi

doi:10.1039/d2ja00177b

Cited by 3 publications

(3 citation statements)

References 56 publications

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“…The internal morphology of with liquid exhibits similarities to plasma ejections in near-vacuum atmospheres. Thus, the radial expansion distance approximately matches the measured dynamic melting diameter at the interface [29][30][31][32][33]. These observations further contribute to understanding of plasma dynamics and the associated physical phenomena.…”

Section: Resultssupporting

confidence: 72%

Ultrafast quasi-three-dimensional imaging

Lian

Jiang

Sun

et al. 2023

Int. J. Extrem. Manuf.

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Understanding laser induced ultrafast process with complex three-dimensional (3D) geometrical and extreme property evolution offers unique platform to explore novel physical phenomena and to overcome manufacturing limitations. Ultrafast imaging has been considered as an effective tool due to their exceptional spatiotemporal resolution ability. However, the current imaging techniques with single view imaging actually projecting 3D information on two-dimensional plane, leading to great information loss, and misunderstanding the nature of ultrafast process. Here, we propose a quasi-3D imaging method to describe the 3D ultrafast process and further analyse spatial asymmetric of laser induced plasma. The vertically polarization laser pulses are adopted to illuminate reflection-transmission views, and the binarization techniques are employed to extract contours, forming the corresponding two-dimensional matrix. By rotating and multiplying the two-dimensional contour matrices obtained from the dual views, the quasi-3D image was reconstructed. It successfully unveils dual phase transition mechanisms and elucidates the diffraction phenomena occurring outside the plasma. Furthermore, the quasi-3D image confirms spatial asymmetric of plasma in picosecond plasma, which is hard to acquire in two-dimensional images. Our findings demonstrate that quasi-3D imaging not only offers a more comprehensive understanding of plasma dynamics than previous imaging methods, but also has widespread potential in various ultrafast fields such as strong-field physics, fluid dynamics, and cutting-edge manufacturing.

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Section: Resultssupporting

confidence: 72%

Ultrafast quasi-three-dimensional imaging

Lian

Jiang

Sun

et al. 2023

Int. J. Extrem. Manuf.

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show abstract

Section: Introductionmentioning

confidence: 99%

“…1,2 However, the transient and spatially inhomogeneous nature of laser plasmas requires a comprehensive understanding of plasma mechanisms, such as plume expansion dynamics and gas-phase chemistry, all of which still require numerous fundamental studies. [3][4][5][6][7][8][9][10][11] High spectral resolution and sensitivity are crucial for using the ablation process in spectroscopic analysis, particularly isotopic analysis. There are two types of spectroscopic analyses that use laser ablation: one is emission spectroscopy from a hot laser plasma (laser-induced breakdown spectroscopy; LIBS), and the other is resonance absorption and uorescence spectroscopy for light transmitted through a cooled laser plasma.…”

Section: Introductionmentioning

confidence: 99%

Doppler-free ablation fluorescence spectroscopy of Ca for high-resolution remote isotopic analysis

Miyabe

Kato

Hasegawa

2023

J. Anal. At. Spectrom.

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Comparison of excitation temperature of a laser-produced plasma by combining emission and absorption spectroscopy

Polek,

Phillips,

Beg

et al. 2024

AIP Advances

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Measurement of the temporal evolution of laser-produced plasma temperature is very important for many of its applications, and several plasma diagnostic tools are routinely used by researchers. However, it is very challenging to measure the properties of the plasma at the early and late times of its evolution using a single diagnostic tool. In this study, we combined emission and laser absorption spectroscopy to compare the excitation temperatures of a laser-produced uranium plasma system. Several U I transitions in the near-infrared spectral range (775–800 nm) were considered, and the Boltzmann plot method was used to measure the excitation temperatures using both emission and absorption spectroscopy. Emission spectroscopy provided early-time temperature measurements of the plasma up to times 2–20 µs, while absorption spectroscopy provided temperature measurements at late times of plasma evolution (for times 5–80 µs). The emission and absorbance of U I transitions were found to follow the Boltzmann distribution, indicating the plasma is likely in the state of local thermodynamic equilibrium even at late times of its lifetime. The emission and absorption-based time-resolved excitation temperatures demonstrated good agreement at earlier times (≤15 µs) in the overlapped temporal region, while a deviation in the measured values was seen at times (≥15 µs), and potential reasons for such a disagreement are discussed.

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Doppler splitting and expansion dynamics of laser-produced plasma plume under a high vacuum ambience

Abstract: The expansion behaviour and spectroscopic characteristics of laser ablation plumes under a high vacuum ambience (<10−1 Pa) have not been investigated to date. For isotope identification using resonance ionisation mass...

Cited by 3 publications

References 56 publications

Ultrafast quasi-three-dimensional imaging

Ultrafast quasi-three-dimensional imaging

Doppler-free ablation fluorescence spectroscopy of Ca for high-resolution remote isotopic analysis

Comparison of excitation temperature of a laser-produced plasma by combining emission and absorption spectroscopy

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