Experimental study of the microwave (40 GHz) and laser radiation (1.55 μm) transmission through an air-plasma layer behind the shock wave front

The transmission of microwave and laser radiation through the air-plasma layer behind the front of the shock wave is studied on the shock tube. The well-known fact that the plasma is not transparent for microwave radiation in the range of electron concentrations 2∙1012 - 4∙1014 cm-3 is experimentally confirmed. At the same time, the theoretical estimates of plasma transparence for laser infrared radiation at the wavelength of 1.55 μm is first proved experimentally.

shock wave, plasma, electrons concentration, absorption of laser radiation, absorption of microwave radiation

Экспериментальное исследование прохождения СВЧ (40 ГГц) и лазерного излучения (1.55 мкм) сквозь слой воздушной плазмы за фронтом ударной волны

На ударной трубе исследовано прохождение СВЧ и лазерного излучения сквозь слой воздушной плазмы за фронтом ударной волны. Экспериментально подтверждён известный факт, что в диапазоне концентраций электронов 2∙1012 - 4∙1014 см-3, плазма не прозрачна для излучения СВЧ-сигнала (частота излучения 40ГГц). В то же время впервые экспериментально подтверждена предсказанная ранее теоретические прозрачность воздушной плазмы для лазерного инфракрасного излучения на длине волны 1,55 мкм.

ударные волны, плазма, концентрация электронов, поглощение лазерного излучения, поглощение СВЧ излучения

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