scholarly journals Two-stage velocity distribution measurement from multiple projections by tunable diode laser absorption spectrum

2019 ◽  
Vol 68 (24) ◽  
pp. 247801
Author(s):  
Chuan-Wei Wang ◽  
Ning Li ◽  
Xiao-Long Huang ◽  
Chun-Sheng Weng
Keyword(s):  
Absorption Spectrum ◽  
Velocity Distribution ◽  
Diode Laser ◽  
Tunable Diode Laser ◽  
Two Stage ◽  
Distribution Measurement ◽  
Laser Absorption ◽  
Diode Laser Absorption

Minimization of Interference Fringes in Tunable Diode Laser Absorption Spectrum Based on Empirical Mode Decomposition

2018 ◽  
Vol 55 (11) ◽  
pp. 113001
Author(s):  
郭心骞 Guo Xinqian ◽  
邱选兵 Qiu Xuanbing ◽  
季文海 Ji Wenhai ◽  
邵李刚 Shao Ligang ◽  
刘淑平 Liu Shuping ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Diode Laser ◽  
Empirical Mode Decomposition ◽  
Tunable Diode Laser ◽  
Laser Absorption ◽  
Interference Fringes ◽  
Mode Decomposition ◽  
Diode Laser Absorption

Tracing methane dissolved in transformer oil by tunable diode laser absorption spectrum

2016 ◽  
Vol 23 (6) ◽  
pp. 3435-3442 ◽  
Author(s):  
Jun Jiang ◽  
Guo-ming Ma ◽  
Hong-tu Song ◽  
Hong-yang Zhou ◽  
Cheng-rong Li ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Diode Laser ◽  
Transformer Oil ◽  
Tunable Diode Laser ◽  
Laser Absorption ◽  
Diode Laser Absorption

scholarly journals Measurement of the Magnetic Field in a Linear Magnetized Plasma by Tunable Diode Laser Absorption Spectroscopy

Atoms ◽  
2019 ◽  
Vol 7 (2) ◽  
pp. 48 ◽  
Author(s):  
Sven Dickheuer ◽  
Oleksandr Marchuk ◽  
Tsanko Tsankov ◽  
Dirk Luggenhölscher ◽  
Uwe Czarnetzki ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Absorption Spectrum ◽  
Diode Laser ◽  
Absorption Spectroscopy ◽  
Magnetized Plasma ◽  
Tunable Diode Laser ◽  
Laser Absorption Spectroscopy ◽  
Laser Absorption ◽  
Diode Laser Absorption ◽  
The Magnetic Field

Tunable diode laser absorption spectroscopy (TDLAS) is a commonly used technique to measure the temperature and density of atoms or molecules in a gas. In this work, we demonstrate that the TDLAS diagnostics could be effectively applied to measure the magnetic field in a low-density weakly magnetized plasma using the Zeeman splitting of the absorption spectrum of lines from noble gases. The laser wavelength is tailored to fit the 1 s 5 → 2 p 6 transition of atomic Ar with the wavelength λ = 763.51 nm . Two mechanisms of line broadening and splitting are observed: Doppler broadening and Zeeman effect. The latter is especially pronounced by applying polarization-selective observation of the absorption to the TDLAS measurements. By fitting the σ and π components of the absorption spectrum, the line-integrated magnetic field on the order of 30–50 mT is determined. The agreement between the measured values and the vacuum field (neglecting the impact of the plasma) calculations on the axis of the PSI-2 is found to be about 15–20%.

scholarly journals Tracing Acetylene Dissolved in Transformer Oil by Tunable Diode Laser Absorption Spectrum

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Guo-ming Ma ◽  
Shu-jing Zhao ◽  
Jun Jiang ◽  
Hong-tu Song ◽  
Cheng-rong Li ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Diode Laser ◽  
Transformer Oil ◽  
Tunable Diode Laser ◽  
Laser Absorption ◽  
Diode Laser Absorption
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