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Poland Net emission coefficients of low temperature thermal iron-helium plasma mixture at atmospheric pressure are presented. The calculations are made assuming the plasma is in the local thermodynamic equilibrium at a pressure of 0.1 MPa. The results are presented for several values of helium mass fraction in the mixture (between 0 and 1), for a temperature range 3000-25000 K and three characteristic plasma dimensions; 0 - corresponding to the optically thin case, and 1 mm and 10 mm. The values of net emission coefficients allow the estimations of total radiation losses in iron-helium plasmas.
Słowa kluczowe
Czasopismo
Rocznik
Tom
Strony
365--373
Opis fizyczny
Bibliogr. 21 poz.
Twórcy
autor
autor
autor
- Institute of Fundamental Technological Research, Swietokrzyska 21, 00-049 Warszawa,
Bibliografia
- [1] DULEY W.W., Laser Welding, John Wiley and Sons, New York 1999.
- [2] BECK M., BERGER P., HUEGEL H., The effect of plasma formation on beam focusing in deep penetration welding with CO2 laser, Journal of Physics D: Applied Physics 28(12), 1995, pp. 2430–42.
- [3] HOFFMAN J., SZYMANSKI Z., Time-dependent spectroscopy of plasma plume under laser welding conditions, Journal of Physics D: Applied Physics 37(13), 2004, pp. 1792–9.
- [4] MOŚCICKI T., HOFFMAN J., SZYMANSKI Z., Modelling of plasma plume induced during laser welding, Journal of Physics D: Applied Physics 39(4), 2006, pp. 685–92.
- [5] MENART J., MALIK S., Net emission coefficient for argon-iron termal plasmas, Journal of Physics D: Applied Physics 35(9), 2002, pp. 867–74.
- [6] MOSCICKI T., HOFFMAN J., SZYMANSKI Z., Emission coefficient of low temperature thermal iron plasma, Czechoslovak Journal of Physics 54(Suppl. C), 2004, pp. C677–81.
- [7] LOWKE J.J., Predictions of arc temperature profiles using approximate emission coefficients for radiation losses, Journal of Quantitative Spectroscopy and Radiative Transfer 14(2), 1974, pp. 111–22.
- [8] RICHTER J., Radiation of Hot Gases in Plasma Diagnostics, Lochte-Holtgreven, North Holland, Amsterdam 1968.
- [9] CABANNES F.,CHAPELLE J.C., Reactions Under Plasma Conditions, [Ed.] Venugopalan M., Wiley- -Interscience, New York 1971.
- [10] TIX C., SIMON G., A transport theoretical model of the keyhole plasma in penetration laser welding, Journal of Physics D: Applied Physics 26(11), 1993, pp. 2066–74.
- [11] NAHAR S.N., Atomic data from the Iron Project. 7. Radiative dipole transition probabilities for Fe II, Astronomy and Astrophysics 293(3), 1995, pp. 967–77.
- [12] BAUTISTA M.A., Atomic data from the iron project – XX. Photoionization cross sections and oscillator strengths for Fe I, Astronomy and Astrophysics Supplement Series 122(1), 1997, pp. 167–76.
- [13] HALENKA J., GRABOWSKI B., Atomic partition functions for iron, Astronomy and Astrophysics Supplement Series 57(1) 1984, pp. 43–9.
- [14] DRAWIN H.-W., FELENBOK P., Data for Plasmas in Local Thermodynamic Equilibrium, Gauthier- -Villars, Paris 1965.
- [15] MCLEAN A.B., MITCHELL C.E.J., SWANSTON D.M., Implementation of an efficient analytical approximation to the Voigt function for photoemission lineshape analysis, Journal of Electron Spectroscopy and Related Phenomena 69(2), 1994, pp. 125–32.
- [16] PURIĆ J., ĆUK M., DIMITRIJEVIC M.S., LESSAGE A., Regularities of Stark parameters along the periodic table, Astrophysical Journal 382(1), 1991, pp. 353–7.
- [17] PURIĆ J., MILLER M.H., LESSAGE A., Electron impact broadening parameters predictions from regularities: Fe I, Fe II, Fe III, Fe IV, C IV, and Si IV, Astrophysical Journal 416(2), 1993, pp. 825–30.
- [18] Atomic Spectra Database: http://physics.nist.gov/PhysRefData/contents.html.
- [19] DIMITRIJEVIC M.S., SAHAL-BRECHOT S., Stark broadening of neutral helium lines, Journal of Quantitative Spectroscopy and Radiative Transfer 31(4), 1984, pp. 301–13.
- [20] GRIEM H., Spectral Line Broadening by Plasmas, Academic Press, New York and London 1974.
- [21] HOFSAESS D.J., Emission continua of rare gas plasmas, Journal of Quantitative Spectroscopy and Radiative Transfer 19(3), 1978, pp. 339–52.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BPW9-0006-0061