Deviation from Local Thermodynamic Equilibrium State in Thermal Plasma

この論文にアクセスする

この論文をさがす

著者

抄録

Spectroscopic analysis of Ar–H<sub>2</sub> and Ar–N<sub>2</sub> plasmas revealed that the population density of the excited states of each species (Ar, H and N) followed a Boltzmann distribution, but each species had its own respective excitation temperature. The temperature of the argon was lower than that of the hydrogen in the plasma of Ar–H<sub>2</sub> mixture. The temperature of the nitrogen was close to that of the argon in the plasma of Ar–N<sub>2</sub> mixture under one atmospheric pressure. The estimation of the temperatures defined by the velocity distribution functions from the experimental conditions indicate that there are the possibilities to have higher temperatures for the hydrogen than that for the argon in the plasma. These results suggest that there is a deviation from local thermodynamic equilibrium (LTE) in these plasmas under one atmospheric pressure. The deviations from LTE in these plasmas are explained by the differences in the energy flow in the plasmas. The energy flows of these plasmas are considered as follows from the estimated relaxation times of energy distributions for each species. As for the Ar–H<sub>2</sub> plasma, the electric energy is transferred to the electrons and then the energy of electrons is transferred to the hydrogen atoms. The argon atoms are mainly heated by collisions with the hydrogen atoms. In the case of the Ar–N<sub>2</sub> plasma, both the argon atoms and the nitrogen atoms are heated by collisions with the electrons which obtain the electric energy. As a result, the temperature state of <I>T</I><sub>e</sub>≈<I>T</I><sub>H</sub>><I>T</I><sub>Ar</sub> and <I>T</I><sub>e</sub>><I>T</I><sub>Ar</sub>≈<I>T</I><sub>N</sub> could exist in the plasma.

収録刊行物

  • ISIJ international

    ISIJ international 38(11), 1165-1169, 1998-11-15

    The Iron and Steel Institute of Japan

参考文献:  17件中 1-17件 を表示

  • <no title>

    DINULESCU H. A.

    J. Appl. Phys. 51, 3149, 1980

    被引用文献3件

  • <no title>

    HE G.

    Tetsu-to-Hagane 82, 959, 1996

    被引用文献1件

  • <no title>

    YOSHIDA T.

    J. Appl. Phys. 54, 640, 1983

    被引用文献7件

  • <no title>

    NESTOR O. H.

    SIAM Rev. 2, 200, 1960

    被引用文献1件

  • <no title>

    KITAMURA T.

    Proc. of Japanese Symp. on Plasma Chem. 2, 257, 1989

    被引用文献1件

  • <no title>

    TAKADA K.

    Materia Japan 33, 1142, 1994

    被引用文献1件

  • <no title>

    WIESE W. L.

    Atomic Transition Probabilities, 1966

    被引用文献3件

  • <no title>

    Plasma Technology in Metallurgical Processing 18, 1987

    被引用文献1件

  • <no title>

    GOLDEN D. E.

    Phys. Rev. 149, 58, 1966

    被引用文献1件

  • <no title>

    MCDOWELL M.

    Atomic Collision Processes 53, 1964

    被引用文献1件

  • <no title>

    NEYNABER R. H.

    Phys. Rev. 124, 135, 1961

    被引用文献1件

  • <no title>

    NEYNABER R. H.

    Phys. Rev. 129, 2069, 1963

    被引用文献1件

  • <no title>

    SPITZER L.

    Jr. : Physics of Fully Ionized Gases 133, 1962

    被引用文献1件

  • <no title>

    KANZAWA A.

    Purazumadennetsu 35, 1992

    被引用文献1件

  • <no title>

    YOSHIDA T.

    J. Appl. Phys. 54, 640, 1983

    被引用文献7件

  • <no title>

    KEKEZ M. M.

    J. Phys. D : Appl. Phys. 3, 1886, 1970

    DOI 被引用文献10件

  • <no title>

    EKERT H. U.

    J. Appl. Phys. 43, 2707, 1972

    DOI 被引用文献1件

各種コード

ページトップへ