Simultaneous measurement of electron and heavy particle temperatures in He laser-induced plasma by Thomson and Rayleigh scattering
Thomson and Rayleigh scattering methods were applied to quantify the electron and heavy particle temperatures, as well as electron number density, in a laser spark in helium at atmospheric pressure. Plasma was created using 4.5 ns, 25 mJ pulses from Nd:YAG laser at 532 nm. Measurements, performed fo...
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| Veröffentlicht in: | Applied physics letters 2013-04, Vol.102 (13) |
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| container_title | Applied physics letters |
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| creator | Dzierżęga, K. Mendys, A. Pokrzywka, B. Zawadzki, W. Pellerin, S. |
| description | Thomson and Rayleigh scattering methods were applied to quantify the electron and heavy particle temperatures, as well as electron number density, in a laser spark in helium at atmospheric pressure. Plasma was created using 4.5 ns, 25 mJ pulses from Nd:YAG laser at 532 nm. Measurements, performed for the time interval between 20 ns and 800 ns after breakdown, show electron density and temperature to decrease from 7.8×1023 m−3 to 2.6×1022 m−3 and from 95 900 K to 10 350 K, respectively. At the same time, the heavy particle temperature drops from only 47 000 K down to 4100 K which indicates a two temperature plasma out of local isothermal equilibrium. |
| doi_str_mv | 10.1063/1.4801467 |
| format | Article |
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Plasma was created using 4.5 ns, 25 mJ pulses from Nd:YAG laser at 532 nm. Measurements, performed for the time interval between 20 ns and 800 ns after breakdown, show electron density and temperature to decrease from 7.8×1023 m−3 to 2.6×1022 m−3 and from 95 900 K to 10 350 K, respectively. 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Plasma was created using 4.5 ns, 25 mJ pulses from Nd:YAG laser at 532 nm. Measurements, performed for the time interval between 20 ns and 800 ns after breakdown, show electron density and temperature to decrease from 7.8×1023 m−3 to 2.6×1022 m−3 and from 95 900 K to 10 350 K, respectively. 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Plasma was created using 4.5 ns, 25 mJ pulses from Nd:YAG laser at 532 nm. Measurements, performed for the time interval between 20 ns and 800 ns after breakdown, show electron density and temperature to decrease from 7.8×1023 m−3 to 2.6×1022 m−3 and from 95 900 K to 10 350 K, respectively. At the same time, the heavy particle temperature drops from only 47 000 K down to 4100 K which indicates a two temperature plasma out of local isothermal equilibrium.</abstract><cop>United States</cop><pub>American Institute of Physics</pub><doi>10.1063/1.4801467</doi><orcidid>https://orcid.org/0000-0002-8927-1389</orcidid><orcidid>https://orcid.org/0000-0002-2428-2407</orcidid></addata></record> |
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| ispartof | Applied physics letters, 2013-04, Vol.102 (13) |
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| language | eng |
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| source | AIP Journals Complete; AIP Digital Archive; Alma/SFX Local Collection |
| subjects | 70 PLASMA PHYSICS AND FUSION TECHNOLOGY ATMOSPHERIC PRESSURE BREAKDOWN DENSITY ELECTRON DENSITY ELECTRONS EQUILIBRIUM HELIUM NEODYMIUM LASERS PARTICLES Physics PLASMA DENSITY PLASMA DIAGNOSTICS Plasma Physics PLASMA PRODUCTION PULSES RAYLEIGH SCATTERING TEMPERATURE MEASUREMENT THOMSON SCATTERING |
| title | Simultaneous measurement of electron and heavy particle temperatures in He laser-induced plasma by Thomson and Rayleigh scattering |
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