Resonant Doppler velocimetry of He flow discharge

Resonant Doppler velocimetry of He flow discharge

We demonstrated the resonant Doppler velocimetry of He atoms in a flowing DC plasma. The laser-induced emission of He atoms was detected while the wavelength of a dye laser was scanned (LIF excitation spectroscopy), and the flow velocity was derived from the Doppler shift of the observed spectral li...

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Veröffentlicht in:SHINKU 1994/01/20, Vol.37(1), pp.17-21
Hauptverfasser: SEKINE, Chizu, SEKINE, Shigeyuki, WADA, Akihide, HIROSE, Chiaki
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creator SEKINE, Chizu
SEKINE, Shigeyuki
WADA, Akihide
HIROSE, Chiaki
description We demonstrated the resonant Doppler velocimetry of He atoms in a flowing DC plasma. The laser-induced emission of He atoms was detected while the wavelength of a dye laser was scanned (LIF excitation spectroscopy), and the flow velocity was derived from the Doppler shift of the observed spectral line. The overall accuracy of measured velocity was 30-60 ms-1. We found that flow velocity exhibited a significant dependence on the discharge current at a constant flow rate. We also observed a spectrum by the LIF excitation method combined with Lamb's dip technique. The combination method was useful when the spectral line exhibited Stark shift.
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title Resonant Doppler velocimetry of He flow discharge
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