Improving the emission intensity of laser-induced breakdown spectroscopy by tip discharge of a Tesla coil

Wang, Qiuyun; Dang, Weijie; Jiang, Yuanfei; Chen, Anmin; Mu, Jin

doi:10.1039/d2ja00015f

Cited by 3 publications

(1 citation statement)

References 41 publications

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“…Laser-induced breakdown spectroscopy (LIBS) is a technique that uses a high-power laser to vaporize a small amount of a sample and create plasma [1][2][3]. The light emitted by the plasma is detected by a spectrometer to obtain the element of the sample [4][5][6]. LIBS has many applications in fields such as material science, environmental monitoring, and forensic analysis.…”

Section: Introductionmentioning

confidence: 99%

Emission Enhancement in fs + ns Dual-Pulse LIBS of Cu

2023

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Femtosecond (fs) and nanosecond (ns) laser pulses have their own advantages and disadvantages in laser-induced breakdown spectroscopy (LIBS). This paper investigated fs + ns (FN) dual-pulse (DP) LIBS, utilizing the respective advantages of two laser pulses in LIBS. Compared to traditional single ns LIBS, applying a smaller energy fs pulse could effectively improve the LIBS emission. Firstly, this study discussed the spectra of FN DP LIBS with overlapping pulse time—that is, the FN DP inter-pulse delay (DID) was 0 μs. The results showed that the spectra were increased to three times that of a single ns LIBS. Subsequently, the DID between the two pulses was optimized. The results showed that as the DID between the two pulses increased, the spectral emission first increased and then decreased, ultimately remaining unchanged. The optimized DID was approximately 2 μs. Finally, using this optimized DID, the variation of spectral intensity with ns laser energy was discussed in DP LIBS. The spectral enhancement ratio increased from 3 with 0 μs DID to 6 with 2 μs DID. The investigation provides a reference in the application of FN DP LIBS element analysis.

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Section: Introductionmentioning

confidence: 99%

Emission Enhancement in fs + ns Dual-Pulse LIBS of Cu

2023

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Real-time detection of viruses in aerosols with weak light imaging based on Tesla discharge

Xia

Tian

et al. 2022

Applied Physics Letters

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The analysis and detection of nucleic acid and specific antigens and antibodies are the most basic technologies for virus monitoring. However, the potential window for applying these technologies exists within a late specific period in the early monitoring and control of unknown viruses, especially human and animal pathogenic viruses transmitted via aerosols, e.g., SARS-CoV-2 and its variants. This is because early, real-time, and convenient monitoring of unknown viruses in the air or exhaled gas cannot be directly achieved through existing technologies. Herein, we report a weak light spectral imaging technology based on Tesla discharge (termed T-DAI) that can quickly monitor for viruses in real time in simulated aerosols with 71% sensitivity and 76% specificity for aerosol virus concentrations exceeding approximately 2800 vp/ μl. This technology realizes the rapid detection of low concentrations of viruses in aerosols and could provide an important means for predicting, screening, and monitoring unknown or pandemic pathogenic viruses in the air or exhaled breath of humans and animals.

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Enhancing silicon spectral emission in LIBS using Tesla coil discharge

CUI 崔,

LIU 刘,

CHEN 陈

et al. 2024

Plasma Sci. Technol.

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Laser-induced breakdown spectroscopy (LIBS) is a powerful technique for elemental analysis, offering rapid analysis, minimal sample preparation, wide elemental coverage, and portability. To enhance the detection sensitivity of LIBS, increasing the spectral emission intensity is crucial. This paper explores the use of Tesla coil (TC) discharge as an alternative to spark discharge in silicon LIBS. The study examines the influence of TC discharge on both time-integrated and time-resolved spectra, with and without TC discharge; the corresponding electron temperature and density are obtained. The results show that TC discharge significantly amplifies the spectral intensity, improving signal sensitivity in LIBS analysis. Specifically, in the laser energy range from 7.4 to 24.0 mJ, TC discharge increased the average spectral line intensities of Si (II) 385.60 nm and Si (I) 390.55 nm by factors of 8.4 and 5.1, respectively. Additionally, the average electron temperature and density were enhanced by approximately 3.2% and 4.2%, respectively, under TC discharge. The advantages of TC discharge include higher energy deposition, extended discharge duration, reduced electrode erosion, and enhanced safety. This research contributes to advancing LIBS technology and expanding its applications in various fields.

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Improving the emission intensity of laser-induced breakdown spectroscopy by tip discharge of a Tesla coil

Abstract: The study combined Tesla coil discharge with laser-induced breakdown spectroscopy (TCD-LIBS) to improve the spectral intensity of Cu plasmas. The Tesla coil used a transformer to enhance an ordinary voltage,...

Cited by 3 publications

References 41 publications

Emission Enhancement in fs + ns Dual-Pulse LIBS of Cu

Emission Enhancement in fs + ns Dual-Pulse LIBS of Cu

Real-time detection of viruses in aerosols with weak light imaging based on Tesla discharge

Enhancing silicon spectral emission in LIBS using Tesla coil discharge

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