Multibeam iterferometry of self-sustaining and laser induced MW discharges in air

Результат исследований: Материалы конференцийматериалы

1 цитирование (Scopus)

Выдержка

Multibeam interferometry technique for investigation self-sustaining and laser-induced MW-discharges in supersonic flows (static pressure 10-50 Torr) and quiescent gas has been developed. The experimental setup contains MW generator, gas-dynamic vacuum chamber, ignition laser and diagnostic system. MW, 1,5 microsecond, X-range pulse generator with output power 200 kW is used to create either the self-sustaining discharge or the laser-induced MW discharge (at the atmospheric pressure). In the last case, Q-switched, 25 nanosecond, 0,2 mJ Ruby laser is used. The temporal evolution of optical density fields for breakdown plasma and thermal well, arising on this place are studied using the high-sensitive intro-chamber Fabry-Perot interferometer. Investigation area of supersonic flow is placed between the interferometer mirrors, which are installed inside the test chamber. In this case the chamber windows are not included in the optical path of the interferometer and it sensitivity for intro-cavity phase objects becomes very high. Intro-chamber plane interferometer Fabry-Perot has fineness about 14, light orifice diameter 86 mm and distance between mirrors 650 mm. Interferometer operates with single - frequency, stabilising (δλ/λ ≤10-10) He-Ne laser with output power 1 mW . The interference picture is analysing by the high-sensitive gated (exposition time 1-500 μs) CCD camera. These pictures have a high fineness and comparatively good S/N ratio (20-25). It allows to get the sensitivity for interference line shift less than 1/50 of interference band. For thermal well with diameter about 5 mm, arising in flow with static temperature 200K and static pressure 35 Torr, this minimal measuring shift corresponds to temperature changing about 10 K. The heating level for this thermal well at the moment 10 μs after MW discharge is 250±10K. Analysis of interference pictures of wave structures, arising in quiescent gas at the atmospheric pressure at the delays 50-100 μs after laser ignition spark shows, that very deep thermal well exists at the place, were the most effective MW energy inputs is monitoring.

Язык оригиналаанглийский
Страницы8573-8579
Число страниц7
СостояниеОпубликовано - 1 дек 2005
Событие43rd AIAA Aerospace Sciences Meeting and Exhibit - Reno, Соединенные Штаты Америки
Продолжительность: 10 янв 200513 янв 2005
Номер конференции: 43
https://arc.aiaa.org/doi/book/10.2514/MASM05
https://istina.msu.ru/collections/228254/

Конференция

Конференция43rd AIAA Aerospace Sciences Meeting and Exhibit
СтранаСоединенные Штаты Америки
ГородReno
Период10/01/0513/01/05
Адрес в сети Интернет

Отпечаток

Discharge (fluid mechanics)
Lasers
Air
Interferometers
Fabry-Perot interferometers
Supersonic flow
Atmospheric pressure
Ignition
Ruby
Gas generators
Density (optical)
Pulse generators
Gas dynamics
CCD cameras
Orifices
Electric sparks
Gases
Interferometry
Vacuum
Plasmas

Предметные области Scopus

  • Технология (все)

Цитировать

Mashek, I. C., Anisimov, Y. I., Lashkov, V. A., & Kolesnichenko, Y. F. (2005). Multibeam iterferometry of self-sustaining and laser induced MW discharges in air. 8573-8579. Документ представлен на 43rd AIAA Aerospace Sciences Meeting and Exhibit, Reno, Соединенные Штаты Америки.
Mashek, Igor Ch ; Anisimov, Yuri I. ; Lashkov, Valery A. ; Kolesnichenko, Yuri F. / Multibeam iterferometry of self-sustaining and laser induced MW discharges in air. Документ представлен на 43rd AIAA Aerospace Sciences Meeting and Exhibit, Reno, Соединенные Штаты Америки.7 стр.
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title = "Multibeam iterferometry of self-sustaining and laser induced MW discharges in air",
abstract = "Multibeam interferometry technique for investigation self-sustaining and laser-induced MW-discharges in supersonic flows (static pressure 10-50 Torr) and quiescent gas has been developed. The experimental setup contains MW generator, gas-dynamic vacuum chamber, ignition laser and diagnostic system. MW, 1,5 microsecond, X-range pulse generator with output power 200 kW is used to create either the self-sustaining discharge or the laser-induced MW discharge (at the atmospheric pressure). In the last case, Q-switched, 25 nanosecond, 0,2 mJ Ruby laser is used. The temporal evolution of optical density fields for breakdown plasma and thermal well, arising on this place are studied using the high-sensitive intro-chamber Fabry-Perot interferometer. Investigation area of supersonic flow is placed between the interferometer mirrors, which are installed inside the test chamber. In this case the chamber windows are not included in the optical path of the interferometer and it sensitivity for intro-cavity phase objects becomes very high. Intro-chamber plane interferometer Fabry-Perot has fineness about 14, light orifice diameter 86 mm and distance between mirrors 650 mm. Interferometer operates with single - frequency, stabilising (δλ/λ ≤10-10) He-Ne laser with output power 1 mW . The interference picture is analysing by the high-sensitive gated (exposition time 1-500 μs) CCD camera. These pictures have a high fineness and comparatively good S/N ratio (20-25). It allows to get the sensitivity for interference line shift less than 1/50 of interference band. For thermal well with diameter about 5 mm, arising in flow with static temperature 200K and static pressure 35 Torr, this minimal measuring shift corresponds to temperature changing about 10 K. The heating level for this thermal well at the moment 10 μs after MW discharge is 250±10K. Analysis of interference pictures of wave structures, arising in quiescent gas at the atmospheric pressure at the delays 50-100 μs after laser ignition spark shows, that very deep thermal well exists at the place, were the most effective MW energy inputs is monitoring.",
author = "Mashek, {Igor Ch} and Anisimov, {Yuri I.} and Lashkov, {Valery A.} and Kolesnichenko, {Yuri F.}",
year = "2005",
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Mashek, IC, Anisimov, YI, Lashkov, VA & Kolesnichenko, YF 2005, 'Multibeam iterferometry of self-sustaining and laser induced MW discharges in air' Документ представлен на, Reno, Соединенные Штаты Америки, 10/01/05 - 13/01/05, стр. 8573-8579.

Multibeam iterferometry of self-sustaining and laser induced MW discharges in air. / Mashek, Igor Ch; Anisimov, Yuri I.; Lashkov, Valery A.; Kolesnichenko, Yuri F.

2005. 8573-8579 Документ представлен на 43rd AIAA Aerospace Sciences Meeting and Exhibit, Reno, Соединенные Штаты Америки.

Результат исследований: Материалы конференцийматериалы

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T1 - Multibeam iterferometry of self-sustaining and laser induced MW discharges in air

AU - Mashek, Igor Ch

AU - Anisimov, Yuri I.

AU - Lashkov, Valery A.

AU - Kolesnichenko, Yuri F.

PY - 2005/12/1

Y1 - 2005/12/1

N2 - Multibeam interferometry technique for investigation self-sustaining and laser-induced MW-discharges in supersonic flows (static pressure 10-50 Torr) and quiescent gas has been developed. The experimental setup contains MW generator, gas-dynamic vacuum chamber, ignition laser and diagnostic system. MW, 1,5 microsecond, X-range pulse generator with output power 200 kW is used to create either the self-sustaining discharge or the laser-induced MW discharge (at the atmospheric pressure). In the last case, Q-switched, 25 nanosecond, 0,2 mJ Ruby laser is used. The temporal evolution of optical density fields for breakdown plasma and thermal well, arising on this place are studied using the high-sensitive intro-chamber Fabry-Perot interferometer. Investigation area of supersonic flow is placed between the interferometer mirrors, which are installed inside the test chamber. In this case the chamber windows are not included in the optical path of the interferometer and it sensitivity for intro-cavity phase objects becomes very high. Intro-chamber plane interferometer Fabry-Perot has fineness about 14, light orifice diameter 86 mm and distance between mirrors 650 mm. Interferometer operates with single - frequency, stabilising (δλ/λ ≤10-10) He-Ne laser with output power 1 mW . The interference picture is analysing by the high-sensitive gated (exposition time 1-500 μs) CCD camera. These pictures have a high fineness and comparatively good S/N ratio (20-25). It allows to get the sensitivity for interference line shift less than 1/50 of interference band. For thermal well with diameter about 5 mm, arising in flow with static temperature 200K and static pressure 35 Torr, this minimal measuring shift corresponds to temperature changing about 10 K. The heating level for this thermal well at the moment 10 μs after MW discharge is 250±10K. Analysis of interference pictures of wave structures, arising in quiescent gas at the atmospheric pressure at the delays 50-100 μs after laser ignition spark shows, that very deep thermal well exists at the place, were the most effective MW energy inputs is monitoring.

AB - Multibeam interferometry technique for investigation self-sustaining and laser-induced MW-discharges in supersonic flows (static pressure 10-50 Torr) and quiescent gas has been developed. The experimental setup contains MW generator, gas-dynamic vacuum chamber, ignition laser and diagnostic system. MW, 1,5 microsecond, X-range pulse generator with output power 200 kW is used to create either the self-sustaining discharge or the laser-induced MW discharge (at the atmospheric pressure). In the last case, Q-switched, 25 nanosecond, 0,2 mJ Ruby laser is used. The temporal evolution of optical density fields for breakdown plasma and thermal well, arising on this place are studied using the high-sensitive intro-chamber Fabry-Perot interferometer. Investigation area of supersonic flow is placed between the interferometer mirrors, which are installed inside the test chamber. In this case the chamber windows are not included in the optical path of the interferometer and it sensitivity for intro-cavity phase objects becomes very high. Intro-chamber plane interferometer Fabry-Perot has fineness about 14, light orifice diameter 86 mm and distance between mirrors 650 mm. Interferometer operates with single - frequency, stabilising (δλ/λ ≤10-10) He-Ne laser with output power 1 mW . The interference picture is analysing by the high-sensitive gated (exposition time 1-500 μs) CCD camera. These pictures have a high fineness and comparatively good S/N ratio (20-25). It allows to get the sensitivity for interference line shift less than 1/50 of interference band. For thermal well with diameter about 5 mm, arising in flow with static temperature 200K and static pressure 35 Torr, this minimal measuring shift corresponds to temperature changing about 10 K. The heating level for this thermal well at the moment 10 μs after MW discharge is 250±10K. Analysis of interference pictures of wave structures, arising in quiescent gas at the atmospheric pressure at the delays 50-100 μs after laser ignition spark shows, that very deep thermal well exists at the place, were the most effective MW energy inputs is monitoring.

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Mashek IC, Anisimov YI, Lashkov VA, Kolesnichenko YF. Multibeam iterferometry of self-sustaining and laser induced MW discharges in air. 2005. Документ представлен на 43rd AIAA Aerospace Sciences Meeting and Exhibit, Reno, Соединенные Штаты Америки.