|

Spectral-Energy Characteristics of Repetitively-Pulsed Sources of Powerful Infrared Radiation with Sapphire Shells

Authors: Gradov V.M., Gavrish S.V., Rudakov I.V. Published: 13.06.2018
Published in issue: #3(120)/2018  
DOI: 10.18698/0236-3933-2018-3-91-103

 
Category: Physics | Chapter: Physical Electronics  
Keywords: radiation source, pulsed plasma, cesium, mercury, infrared region, mathematical simulation, radiation spectrum

The study focuses on a mathematical model of the discharge in a mixture of cesium, mercury and xenon, the discharge being stabilized by a system of two sapphire shells. The model is used to examine the radiation characteristics of sources of powerful infrared radiation in the ranges 1.8...4.2 µm and 3.0...5.0 µm. The study gives data on the optical absorption coefficient as a function of temperature, pressure, and the ratio of the components of the metal-gas plasma. Moreover, the significant role of the line component in the formation of a complex discrete-continuous structure of the absorption and radiation spectra is shown. We also did research into the transformation of spectral distributions of repetitively-pulsed discharges with the pulse burst pass. The fact of a significant redistribution of radiation between discrete and continuous components is established. The influence of the mass ratio of the components and the geometry of the sources on the peak radiation power (PRP) is investigated. The study shows that an increase in the proportion of cesium in the mixture can lead to both an increase in the PRP and its decrease as a function of the electric power, that is determined by the change in the contribution to the radiation transfer of the line and continuous components with a change in the optical density of the plasma. Results suggest that at an electric power of the order of 2 kW/cm, it is possible to select such parameters of the radiation source that provide the PRP in the two specified ranges at the level of 120 and 60 W/cm, which is confirmed by experimental data with an accuracy of 8...15 %

References

[1] Zubov A. Aircraft protection system from MANTA man-portable air defense system. Zarubezhnoe voennoe obozrenie, 2012, no. 1, pp. 63–67 (in Russ.).

[2] Eltsin S.N., Zhukov A.P., Kashin V.M., Ryutin V.B. Otsenka effektivnosti perenosnykh zenitnykh raketnykh kompleksov [Efficiency assessment of the ground man-portable air defense systems]. Saint Petersburg, Baltiyskiy GTU Publ., 2007. 236 p.

[3] Shcherbinin R. Target seekers of advanced foreign guided missiles and air bombs. Zarubezhnoe voennoe obozrenie, 2009, no. 4, pp. 64–68 (in Russ.).

[4] Shcherbinin R. Aircraft self-defense systems from man-portable air defense system. Zarubezhnoe voennoe obozrenie, 2005, no. 12, pp. 37–42 (in Russ.).

[5] Olgin S. Problems of optoelectronic countermeasures. Zarubezhnoe voennoe obozrenie, 2002, no. 9, pp. 35–41 (in Russ.).

[6] Gavrish S.V., Gradov V.M., Terentyev Yu.I. Design and operation features of lamps with sapphire shell. Svetotekhnika, 2008, no. 2, pp. 12–18 (in Russ.).

[7] Gradov V.M., Egorov P.S. Simulation of processes in selectively radiating discharge of high pressure with regard to effects of non-equilibrium conditions. Vestn. Mosk. Gos. Tekh. Univ. im. N.E. Baumana, Mashinostr. [Herald of the Bauman Moscow State Tech. Univ., Mechan. Eng.], 2002, no. 1, pp. 48–58 (in Russ.).

[8] Gradov V.M., Shcherbakov A.A., Yakovlev A.V. Research of optical and electro-physical pro-perties of pump lamps with alkali metal vapor. Elektronnaya tekhnika. Ser. 4: Elektrovakuumnye i gazorazryadnye pribory, 1984, no.1/100, pp. 23–30 (in Russ.).

[9] Gradov V.M., Gavrish S.V., Rudakov I.V. Simulation of electrophysical processes in pulse-periodic tubular sources of powerful infrared radiation with sapphire shells. Vestn. Mosk. Gos. Tekh. Univ. im. N.E. Baumana, Priborostr. [Herald of the Bauman Moscow State Tech. Univ., Instrum. Eng.], 2017, no. 6, pp. 130–145 (in Russ.). DOI: 10.18698/0236-3933-2017-6-130-145

[10] Baksht F.G., Lapshin V.F. Radiative energy transfer in axial-symmetric LTE plasma in conditions of pulse high pressure cesium discharge. Uspekhi prikladnoy fiziki [Advances in Applied Physics], 2013, vol. 1, no. 2, pp. 183–188 (in Russ.).

[11] Zeldovich Ya.B., Rayzer Yu.P. Fizika udarnykh voln i vysokotemperaturnykh gidrodinami-cheskikh yavleniy [Physics of shock waves and high-temperature hydrodynamic phenomenona]. Moscow, Fizmatlit Publ., 2008. 656 p.

[12] Mitchner M., Kruger Ch.H. Partially ionized gases. Wiley, 1973. 518 p.

[13] Zhdanov V.M. Protsessy perenosa v mnogokomponentnoy plazme [Transfer process in high-temperature plasma]. Moscow, Fizmatlit Publ., 2009. 280 p.

[14] Atomic spectra database. NIST: website. Available at: https://www.nist.gov/pml/atomic-spectra-database (accessed: 25.12.2017).

[15] Saloman E.B. Energy levels and observed spectral lines of Xenon, XeI through XeLIV. J. Phys. Chem. Ref. Data, 2004, vol. 33, iss. 3, pp. 765–843. DOI: 10.1063/1.1649348

[16] Sansonetti J.E. Wavelength, transition probabilities and energy levels for the spectra of Cesium (CsI–CsLV). J. Phys. Chem. Ref. Data, 2009, vol. 38, iss. 4, pp. 761–923. DOI: 10.1063/1.3132702

[17] Saloman E.B. Wavelength, energy levels classifications and energy levels for the spectrum of neutral mercury. J. Phys. Chem. Ref. Data, 2006, vol. 35, iss. 4, pp. 1519–1548. DOI: 10.1063/1.2204960

[18] Surzhikov S.T. Opticheskie svoystva gazov i plazmy [Optical properties of gases and plasma]. Moscow, Bauman MSTU Publ., 2004. 576 p.

[19] Gradov V.M., Lomovskoy I.V. To theory of selectively radiating strong non-equilibrium discharges. Vestn. Mosk. Gos. Tekh. Univ. im. N.E. Baumana, Estestv. Nauki [Herald of the Bauman Moscow State Tech. Univ., Nat. Sci.], 2004, no. 4, pp. 40–68 (in Russ.).

[20] Kalitkin N.N. Chislennye metody [Numerical methods]. Saint Petersburg, BKhV-Peterburg Publ., 2011. 592 p.

[21] Samarskiy A.A., Vabishchevich P.N. Chislennye metody resheniya zadach konvektsii–diffuzii [Numerical methods for solving convection–diffusion problems]. Moscow, LIBROKOM Book house, 2015. 248 p.