· *Vušković, L., R. L. Ash, Z. Shi, S. Popović, and T. Dinh, “Radio-Frequency-Discharge Reaction Cell for Oxygen Extraction from Martian Atmosphere,” Transactions of the Society of Automotive Engineers, J. of Aerospace, 106, 1041-1047 (1998).

· Popović, S. and L. Vušković, “Anomalous Propagation of Planar Shock Wave in Weakly Ionized Gas,” Physics of Plasmas, 7, 1448 (1999).

· *Vuškovic, L., S. Popovic, and R. Ash, “Radio Frequency Dust Removal in Microgravity Conditions,” report of research results to the National Center for Microgravity Research on Fluids Combustion, July 1999.

· *Vuškovic L. and S. Popovic, “Weakly Ionized Gas Generator, Phase I” report of research results to the Accurate Automation Corp., October 1999.

· Popović, S. and L. Vuškovic, “Ionization-Recombination Model for the Supersonic Flow in Weakly Ionized Gas,” AIAA Paper 99-4905 (1999). (American Institute of Aeronautics and Astronautics, Washington, DC).

· S. Popović, L. Vušković, and A. Chow, “Interaction between Acoustic Shock Wave and Glow Discharge,” AIAA Paper 2001-3049 (2001). (American Institute of Aeronautics and Astronautics, Washington, DC).

· Vušković, L. and S. Popović “Collisions of excited atoms in gas discharges,” 20^th International Symposium on the Physics of Ionized Gases, full article in Book of Invited Talks, ed. N. Konjević, Z. Lj. Petrović, and G. Malović, SFIN year XIV Series A, No. A1 (2001) p. 347.  YUISBN 86-82441-08-X.

· Popović, S., P. Kessaratikoon, A. Markhotok, G. Brooke IV, and L. Vušković,, “Shock Wave Propagation and Dispersion in a Microwave Cavity Discharge,” AIAA Paper 2002-2279 (2002). (American Institute of Aeronautics and Astronautics, Washington, DC).

· *Vušković, L., and S. Popović, “Interaction of Acoustic Waves with Weakly Ionized Gas Generated by Microwave Discharge,” report of research results to the NASA Langley Research Center, April 2002.

· Popović, S., L. Vušković, I. I. Esakov, L. P. Gratchev, and K. V. Khodataev, “Subcritical Microwave Streamer Discharge at the Surface of a Polymer Foil,” Appl. Phys. Lett. 81, 1964-1965 (2002).

· Vušković, L., and S. Popović, “Electron Scattering and Hydrodynamic Effects in Ionized Gas,” in Electron Scattering – From Atoms, Molecules, Nuclei and Bulk Matter, edited by C. T. Whelan and N. J. Mason (2005 Kluwer Academic / Plenum Publishers, New York) 291-300.

· Vušković, L., and S. Popović, “Excited Atoms and Molecules in High Pressure Gas Discharges,” in Application of Accelerators in Research and Industry, edited by J. L. Duggan and I. L. Morgan (2003 American Institute of Physics, New York) 172-175.

· Popović, S., and L. Vušković, “Nano-scale Dipole Electrodes for Subcritical Discharges,” in From the Atomic to the Nano-Scale, edited by C. T. Whelan and J. H. McGuire, ISBN 0-9742874-0-7 (2003 Old Dominion University) 142-151.

· Exton, R. J., R. J. Balla, G. C. Herring, Popović, S., and L. Vušković, “Volumetric Near Field Microwave Plasma Generation,” AIAA Paper 2003-4181 (2003). (American Institute of Aeronautics and Astronautics, Washington, DC).

· Jovičević, S., M. Ivković, N. Konjević, Popović, S., and L. Vušković, “On the Excessive Balmer Line Broadening in Microwave Induced Discharges,” J. Appl. Phys. 95, 24 2003.

· *Vušković, L., and S. Popović, “Plasma Aerodynamics and Combustion,” report of research results to the NASA Langley Research Center, February 2004.

· *Vušković, L., and S. Popović, “Magnetohydrodynamic Power Generator,” report of research results to the NASA Langley Research Center, March 2004.

· Kuo, S. P., D. Bivolaru, H. Lai, W. Lai, S. Popović, and P. Kessaratokoon, “Characteristics of an Arc-Seeded Microwave Plasma Torch,” IEEE Trans. Plasma Science, 32, 1734-1741 (2004).

· Popović, S., A. J. Midey, S. Williams, A. I. Fernandez, A. A. Viggiano, P. Zhang, and K. Morokuma, “Ion-molecule rate constants and branching ratios for the reaction of N₃⁺+O₂ from 120 to 1400 K,” J. Chem. Phys. 121, 9481-9488 (2004).

· Vušković, L., S. Popović, J. Drake, and R. W. Moses, “Magnetohydrodynamic Power Generation in the Laboratory Simulated Martian Entry Plasma,” Proc. XV International Conference on MHD Science and Applications, ed. V. Bityrin, pp 150-155, IVTAN, Moscow, May 2005.

· Exton, R. J., S. Popović, G. C. Herring, and M. Cooper, “Levitation using microwave- induced plasmas,” Appl. Phys. Lett. 86, 124103 (2005).

· Popović, S., R. J. Exton, and G. C. Herring, “Transition from diffuse to filamentary domain in a 9.5 GHz microwave-induced surface discharge,” Appl. Phys. Lett. 87, 061502 (2005).

· Vušković L. and S. Popović, “Atomic Interactions in Weakly Ionized Gas: Ionizing Shock Waves,” in Advances in Atomic, Molecular, and Optical Physics, edited by H. Stroke and P. Berman (2005 Elsevier B.V., ISBN 0-12-003851) 51, 451-570 (2005).

· Popović, S., S. Williams, and L. Vušković, “Electron-Impact Dissociative Ionization of Ethylene,” Phys. Rev. A 73, 022711(7 pages) (2006).

· Kuo, S. P., M. Rubinraut, S. Popovic, and D. Bivolaru, “A portable Arc-Microwave Hybrid Plasma Torch Module,” AIAA Paper 2006-1463 (2006). (American Institute of Aeronautics and Astronautics, Washington, DC).

· Kuo, S. P., O. Tarasenko, S. Popovic, and K. Levon, “Killing of Bacterial Spores Contained in a Paper Envelope by a Microwave Plasma Torch,” IEEE Trans. Plasma Science 34, No. 4, 1-8 (2006).

· Raškovioć, M., L. Vušković, S. Popović, L. Phillips, A.-M. Valente-Feliciano, S. B. Radovanov, and L. Godet, “Plasma Treatmenet of Bulk Niobium Surface for SRF Cavities,” Nuclear Inst. & Methods in Physics Research A 569, 663-670 (2006).

· R. Saeks, S. Popović, and A. S. Chow, “Shock Structure Analysis and Aerodynamics in a Weakly Ionized Gas Flow,” NASA/TR-2006-214602 August 2006.

· Kuo, S. P., M. Rubinraut, S. Popovic, and D. Bivolaru, “Characteristic Study of a Portable Arc Microwave Plasma Torch,” IEEE Trans. Plasma Science 34, No. 6, 2537-2544 (2006).

· Popović, S. and L. Vušković, “Aerodynamic Effects in Weakly Ionized Gas: Phenomenology and Applications,” in The Physics of Ionized Gases, edited by Lj. Hadžievski, B. P. Marinković, and N. S. Simonović  (AIP Melville, New York, ISBN 978-0-7354-0377-2) 876, 272-283 (2006).

· Popović, S. and L. Vušković, “Studies of Flow in Ionized Gas: Historical Perspective, Contemporary Experiments, and Applications,” in Sixth International Conference of the Balkan Physical Union, edited by S. Ali Cetin and I. Hikmet, (AIP Melville, New York, ISBN: 978-0-7354-0404-5) 899, 61-77 (2007).

· Kuo, S. P., S. Popović, O. Tarasenko, M.Rubinraut, and M. Rašković, “Fan-shaped microwave plasma for mail decontamination,” Plasma Sources Science and Technology 16, 581-586 (2007).

· Popović, S., M. Raškovioć, S. P. Kuo, and L. Vušković, “Reactive Oxygen Emission from Microwave Discharge Plasmas,” J. Phys.: Conf. Ser. 86, 012013 (15pp) (2007).

· Markhotok, A., S. Popović, and L. Vušković, “The boundary effects of the shock wave dispersion in discharges,” Phys. Plasmas 15, 032103 (5pp) (2008).

· Drake, D. J., S. Popović, and L. Vušković, “Characterization of a supersonic microwave discharge in Ar/H₂/Air mixtures,” J. Appl. Phys. 104, 063305 (7pp) (2008).

· Herring, G. C. and S. Popović, “Microwave air breakdown enhanced with metallic initiators,” Appl. Phys. Lett. 92, 131501 (2008).

· Rašković, M., S. Popović, J. Upadhyay, L. Vušković, L. Phillips, and A-M. Valente-Feliciano, “High etching rates of bulk Nb in Ar/Cl microwave discharge,” J. Vac. Sci. Technol. A 27(2), 301-305 (2009).

· Rašković, M., L. Vušković, and S. Popović, “The High Quality Factor Niobium Cavities Preparation by Plasma Treatment,” Phys. Scr. T 135, 014018 (7pp) (2009).

· Drake, D. J., S. Popović, L. Vušković, and T. Dinh, “Kinetic Description of Martian Atmospheric Entry Plasma,” IEEE Trans. on Plasma Sci. 37, 1646-1655 (2009).

· Williams, S., S. Popović, and M. Gupta, “Microwave plasma generation and filtered transport of O₂ (a ¹Δ_g),” Plasma Sources Science and Technology 18, 035014 (2009).

· Kuo, S. P., O. Tarasenko, J. Chang, S. Popović, C. Y. Chen, H. W. Fan, A. Scott, M. Lahiani, P. Alusta, J. D. Drake, and M. Nikolić, “Contribution of a Portable Air Plasma Torch to Rapid Blood Coagulation as a Method of Preventing Bleeding,” New J. Phys. 11, 115016 (17pp) (2009).

· Drake, D. J., S. Popović, and L. Vušković, “Characterization of a CO₂/N₂/Ar supersonic flowing discharge,” J. Appl. Phys. 106, 083305 (2009).

· D. J. Drake, S. Popović, L. Vušković, and T. Dinh, “Effects of Water Vapor Presence in Martian Atmospheric Entry Plasma,” AIAA-2010-1536 (American Institute of Aeronautics and Astronautics) (2010).

· M. Nikolić, A. Samolov, J. Upadyay, A. Godunov, S. Popović L. Vušković, A.-M. Valente-Feliciano, L. Phillips, “Tomographic Analysis of SRF Cavities as Asymmetric Plasma Reactors,” Proc. IPAC, pp. 3072-3074 (2010) (Kyoto, Japan) (ISBN 978-92-9083-352-9).

· S. Popović, M. Rašković, J. Upadhyay, L. Vušković, H.L. Phillips, A-M. Valente-Feliciano, “Plasma Treatment of Niobium SRF Cavity Surfaces,” Proc. IPAC, pp. 3058-3060 (2010) (Kyoto, Japan) (ISBN 978-92-9083-352-9).

· S. Popović, M. Nikolić, J. Upadyay, and L. Vušković, “On Optimizing the Metastable Oxygen Production from Electrical Discharges,” AIAA-2010-5042 (American Institute of Aeronautics and Astronautics) (2010).

· A. Markhotok and S. Popović, “Refractive Phenomena in the Shock Wave Dispersion with Variable Gradients,” J. Appl. Phys. 107, 123302 (2010); doi:10.1063/1.3432565 [4 pages].

· M. Rašković, J. Upadhyay, L. Vušković, S. Popović, A-M. Valente-Feliciano, and H.L. Phillips, “Plasma treatment of bulk niobium surface for superconducting rf cavities: Optimization of the experimental conditions on flat samples,” Phys. Rev. ST Accel. Beams 13, 112001 (2010) [7 pages].