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  • 1
    Electronic Resource
    Electronic Resource
    Laser-induced fluorescence study of Penning collision of Hei 23S atom with Xe in He+Xe gas discharge plasma (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 1379-1382 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: This paper presents an experimental result on the population of the 23S of Hei in He+Xe gas discharge. The laser-induced fluorescence method was used to find the behavior of the 23S population, and a strong coupling of the 23S with 23P state enabled us to determine the 23S population from the measurement of Hei 5876 A(ring) (23P–33D). The discharge condition considered ranged from 0.2 to 5 Torr in pressure and 20 to 260 mA in discharge current. The measured population of the 23S state in the Xe-mixed condition showed a significant reduction at the pressure of 3 and 5 Torr, but not when the pressure became as low as 0.2 Torr. It was demonstrated that the overall behavior of the observed population was quantitatively explainable with an inclusion of the Penning collision of the 23S with the Xe atom.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.339967
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Laser-induced fluorescence study of discharge plasma in He+Xe mixture gas (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 4479-4483 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: This paper contains experimental results on the population of the 21S atom of HeI in the discharge plasma of a He+Xe gas mixture. The population measurement was made by the laser-induced fluorescence method with the laser light tuned to the HeI line of 5016 A(21S-31P). The fluorescence intensity of HeI lines was measured as a function of the mixture ratio of Xe to He gas. As the Xe gas was mixed, the fluorescence intensity was significantly reduced at pressures ranging from 0.2 to 1 Torr. Further, an increment of the discharge current made the population of the 21S atom increase more remarkably in the Xe-mixed gas than in the pure He. These behaviors were considered using the measured temperature and density of the electrons, and it was concluded that at 1-Torr the Penning collision of the 21S atom with Xe was effective and dominated the behavior of the 21S atom.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.338409
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Emissive probe measurement of electron temperature in high-pressure plasmas (≥1 mTorr) (1988)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 59 (1988), S. 2002-2007 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A new method was investigated to determine the electron temperature with the emissive probe. The basis of the method is the use of a functional relationship between the floating potential and the heating voltage of the emissive probe. A new expression for the change of the floating potential was obtained as functions of the heating voltage and the electron temperature. This expression enabled us to determine the electron temperature from the measured floating potential. An experimental verification of the present method was made at relatively high pressures (above 1 mTorr). It was shown that the electron temperatures measured by the present method were consistent with those obtained by Langmuir characteristics and that the error in them did not exceed 10%. It was emphasized, further, that the method is very attractive because the circuit required is the same as that used in potential measurement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140066
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    Paper (German National Licenses)
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