Monitoring the deposited energy in laser-induced plasmas with an acoustic approach

被引：5

作者：

Wu, Wendong ^{[1
]}

Chai, Shu ^{[1
]}

Zhou, Yuegui ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mech Engn, Inst Thermal Energy Engn, 800 Dongchuan Rd, Shanghai 200240, Peoples R China

来源：

APPLIED OPTICS | 2022年 / 61卷 / 07期

基金：

上海市自然科学基金; 中国国家自然科学基金;

关键词：

INDUCED BREAKDOWN SPECTROSCOPY; MIXTURE FRACTION; SHOCK-WAVES; TEMPERATURE-MEASUREMENTS; N-WAVES; AIR; GAS; COMBUSTION; METHANE; ABSORPTION;

D O I：

10.1364/AO.442780

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The monitoring of energy deposition behavior during the plasma formation process is the basis of recently developed laser-induced breakdown thermometry techniques. Utilizing the acoustic waveforms from laser-induced plasmas, a method to monitor the deposited energy was proposed. The linear relationships between the acoustic energy and the deposited energy were established under four different focal lengths. After the distortions in the sound propagation were corrected, the applicable range of this method was extended to a deposited energy from 10 to 240 mJ. The further spectra analysis in the deposited energy space suggested that the total number density of excited species increased with the deposition energy, without significant fluctuations in plasma temperature in the high-energy region. (C) 2022 Optical Society of America

引用

页码：1734 / 1742

页数：9

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