Influence of heating effect in Thomson scattering diagnosis of laser-produced plasmas in air

Pengpeng MA (麻鹏鹏); Maogen SU (苏茂根); Shiquan CAO (曹世权); Kaiping WANG (王凯平); Weiwei HAN (韩伟伟); Duixiong SUN (孙对兄); Qi MIN (敏琦); Chenzhong DONG (董晨钟)

doi:10.1088/2058-6272/ab869b

Plasma Science and Technology > 2020 > 22(8): 85502-085502. > DOI: 10.1088/2058-6272/ab869b

Pengpeng MA (麻鹏鹏), Maogen SU (苏茂根), Shiquan CAO (曹世权), Kaiping WANG (王凯平), Weiwei HAN (韩伟伟), Duixiong SUN (孙对兄), Qi MIN (敏琦), Chenzhong DONG (董晨钟). Influence of heating effect in Thomson scattering diagnosis of laser-produced plasmas in air[J]. Plasma Science and Technology, 2020, 22(8): 85502-085502. DOI: 10.1088/2058-6272/ab869b

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Influence of heating effect in Thomson scattering diagnosis of laser-produced plasmas in air

¹ Key Laboratory of Atomic and Molecular Physics & Functional Material of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, People's Republic of China
² Joint Laboratory of Atomic and Molecular Physics, Northwest Normal University and Institute of Modern Physics of Chinese Academy of Sciences, Lanzhou 730070, People's Republic of China

Funds: This work is supported by the National Key Research and Development Program of China (No. 2017YFA0402300), National Natural Science Foundation of China (Nos. 11874051, 11564037, 61741513, 11904293), and the Special Fund Project for Guiding Scientific and Technological Inno- vation of Gansu Province (No. 2019zx-10).

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Received Date: January 17, 2020
Revised Date: March 31, 2020
Accepted Date: April 02, 2020

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Abstract

A state diagnosis of laser-produced plasma in air generated by a 1064 nm pulse laser was investigated by the Thomson scattering (TS) method. The evolutions of the electron temperature and electron density were obtained as a function of the time delay which ranged from 300–3200 ns. The heating effect produced by the 532 nm probe beam with different energies on the air plasma at different interaction times was further studied using a time-resolved optical emission spectroscopy technique. The influence of the probe beam on the electron density was found to be negligible, whereas its influence on electron temperature is evident. In addition, the heating effect of the probe beam on the plasma strongly depends on the energy of the probe beam, and gradually weakens with increasing time delay. Our results are helpful for further understanding the TS method and its application in plasma diagnostics.
- laser-produced plasma,
- diagnosis,
- heating effect,
- Thomson scattering,
- opticalemission spectroscopy

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Influence of heating effect in Thomson scattering diagnosis of laser-produced plasmas in air

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