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Title: Final Technical Report - DE-SC0010519: Cavity Enhanced Thomson Scattering Diagnostic for Low Temperature Plasmas

Abstract

A novel cavity-enhanced laser diagnostic has been developed to perform point measurements of spontaneous rotational Raman scattering. A narrow linewidth fiber laser source (1064 nm) is frequency locked to a high-finesse cavity containing the sample gas. Intracavity powers of 22 W are generated from 3.7 mW of incident laser power, corresponding to a buildup factor of 5900. A triple monochromator and a photomultiplier tube in counting mode are used to disperse and measure the scattering spectra. The system is demonstrated with rotational Raman spectra of nitrogen, oxygen, and carbon dioxide at atmospheric pressure. The approach will allow temporally and spatially resolved Raman measurements for combustion diagnostics and, by extending to higher power, Thomson scattering for diagnostics of low-density plasmas.

Authors:
 [1]
  1. Colorado State Univ., Fort Collins, CO (United States)
Publication Date:
Research Org.:
Colorado State Univ., Fort Collins, CO (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
OSTI Identifier:
1437041
Report Number(s):
Final Technical Report
DOE Contract Number:  
SC0010519
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Lasers; fiber; scattering, Raman; Scattering; Rayleigh; spectroscopy; Combustion diagnostics; Plasma diagnostics

Citation Formats

Yalin, Azer P. Final Technical Report - DE-SC0010519: Cavity Enhanced Thomson Scattering Diagnostic for Low Temperature Plasmas. United States: N. p., 2018. Web. doi:10.2172/1437041.
Yalin, Azer P. Final Technical Report - DE-SC0010519: Cavity Enhanced Thomson Scattering Diagnostic for Low Temperature Plasmas. United States. doi:10.2172/1437041.
Yalin, Azer P. Mon . "Final Technical Report - DE-SC0010519: Cavity Enhanced Thomson Scattering Diagnostic for Low Temperature Plasmas". United States. doi:10.2172/1437041. https://www.osti.gov/servlets/purl/1437041.
@article{osti_1437041,
title = {Final Technical Report - DE-SC0010519: Cavity Enhanced Thomson Scattering Diagnostic for Low Temperature Plasmas},
author = {Yalin, Azer P.},
abstractNote = {A novel cavity-enhanced laser diagnostic has been developed to perform point measurements of spontaneous rotational Raman scattering. A narrow linewidth fiber laser source (1064 nm) is frequency locked to a high-finesse cavity containing the sample gas. Intracavity powers of 22 W are generated from 3.7 mW of incident laser power, corresponding to a buildup factor of 5900. A triple monochromator and a photomultiplier tube in counting mode are used to disperse and measure the scattering spectra. The system is demonstrated with rotational Raman spectra of nitrogen, oxygen, and carbon dioxide at atmospheric pressure. The approach will allow temporally and spatially resolved Raman measurements for combustion diagnostics and, by extending to higher power, Thomson scattering for diagnostics of low-density plasmas.},
doi = {10.2172/1437041},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {5}
}