Atmosphere Optics, Spectroscopy and Lasers Laboratory LOA-SL

Research overview.

As one of the most complex issues of physics, the study of nonlinear phenomena, the self-organization processes in the plasma (plasma discharges in gases, laser ablation), etc. , these is one of the extremely important topics for international scientific community [E. Lozneanu, M. Sanduloviciu, Self-organization scenario acting as physical basis of intelligent complex systems created in laboratory Chaos, Solitons and Fractals, 30 (1), 125 (2006) ; R. Srinivasan and V. Mayne-Banton, Appl. Phys. Lett. 41 (1982), pp. 576–578; R. Srinivasan and B. Braren, Chem. Rev. 89 (1989), pp. 1303–1316; L. Urech, T. Lippert, C.R. Phipps, A. Wokaun, Chang, T., Wu, C. C., Podesta, J., Echim, M., Lamy, H., Tam, S. W. Y., ROMA (Rank-Ordered Multifractal Analyses) of intermittency in space plasmas - a brief tutorial review, Nonlinear Processes in Geophysics, Volume 17, Issue 5, 2010; Polymer ablation: From fundamentals of polymer design to laser plasma thruster Applied Surface Science, Volume 253, Issue 15, 30 May 2007, Pages 6409-6415]. These studies are of reference in terms of basic research, especially as applied research.
Multifunctional self-organized complex systems find applications of interest for a wide variety of branches of modern science, such as nanotechnology (obtaining new nano-scale ion sources, etc), the advanced technologies of space propulsion plasma ("Helicon Plasma Thruster Double Layers") or in nano-electronics with a strategic role in developing information technology and telecommunications [S. Ami et all., Chem. Phys. Lett. 367, p. 662, 2003]. Knowledge of the processes leading to the phenomenon of self-organization, and on this basis to obtain nanostructures is very important, on the one hand it allows the action controlled atomic and molecular level during operations for obtaining nanomaterials and on the other hand lead to considerable reduction in the consumption of strategic materials and energy consumption. This control atomic and molecular level is necessary for the development of new technologies (obtaining new materials) capable of nano-scale work in a controlled and reproducible, providing a basis for future production processes [Georgeta Strat, M. Strat, S. Gurlui, C. Focsa, D. Dumitriu | Series: Optoelectronic Materials and Devices, Self- Organization in Nanomaterials, Editors: Punit Boolchand, Gerald Lucovsky, M. Popescu, Editura INOE, 2007, p.53-91].

Double layers have been found and studied in almost all plasma production devices:
- diode plasma [P. Coakley, N. Hershkowitz, R. Hubbard, G. Joyce, Experimental obervations of strong double layers, Phys. Rev. Lett. 40 (1978) 230; S. Iizuka, H. Tanaca, Nonlinear evolution of double layers and electron vortices in an unstable plasma diode, J. Plasma Phys. 33 (1985) 29; J. C. Johnson, N. D’Angelo, R. L. Merlino, A double layer induced ionisation instability, J. Phys. D: Appl. Phys. 23 (1990) 682; G. Hairapetian, R. L. Stenzel, Observation of a stationary, current-free double layer in a plasma, Phys. Rev. Lett. 65 (1990) 175; B. Song, N. D’Angelo, R. L. Merlino, Stability of a spherical double layer produced through ionization, J. Phys. D: Appl. Phys. 25 (1992) 938; T. An, R. L. Merlino, N. D’Angelo, Cylindrical anode double layer („firerods”) produced in a uniform magnetic field, J. Phys. D: Appl. Phys. 27 (1994) 1906; M. Sanduloviciu, C. Borcia, G. Leu, Self-organization phenomena in current carrying plasmas related to the non-linearity of the current versus voltage characteristic, Phys. Lett. A 208 (1995) 136; M. Strat, G. Strat, S. Gurlui, Basic processes in discharge plasma double layers, J. Phys D: Appl. Phys. 32 (1999) 34];
- thermoionic converter [A. I. Kiryuskchenko, M. A. Lebedev, Low-voltage arc in cesium vapor I. Formation of a spherical plasmoid, Sov. Phys. Tech. Phys. 16 (1971) 924];
- DP machine system („double plasma”) [A. N. Sarma, H. Bailung, J. Chutia, Characteristics of sheath instability in a double plasma device, Phys. Plasmas 4 (1997) 61; R. Schrittwieser, C. Avram, P. C. Balan, V. Pohoaţă, C. Stan, M. Sanduloviciu, New insight into the formation of nonlinear space charge structures in various plasmas, Phys. Scripta T84 (2000) 122; V. Pohoaţă, G. Popa, R. Schrittwieser, C. Ioniţă, M. Čerček, Properties and control of anode double layer oscillations and related phenomena, Phys. Rev. E 68 (2003) 016405-1];
- TP machine system [R. T. Carpenter, S. Torvén, The current-voltage characteristics and potential oscillations of a double layer in a triple-plasma device, IEEE Trans. Plasma Sci. PS-15 (1997) 434];
- Q machine system („quiescent”) [N. Sato, R. Hatakeyama, S. Iizuka, T. Mieno, K. Saeki, J. J. Rasmussen, P. Michelsen, Ultrastrong stationary double layers in a nondischarge magnetoplasma, Phys. Rev. Lett. 46 (1981) 1330; S. Iizuka, P. Michelsen, J. J. Rasmussen, R. Schrittwieser, R. Hatakeyama, K. Saeki, N. Sato, Dynamics of a potential barrier formed on the tail of a moving double layer in a collisionless plasma, Phys. Rev. Lett. 48 (1982) 145; S. Iizuka, P. Michelsen, J. J. Rasmussen, R. Schrittwieser, R. Hatakeyama, K. Saeki, N. Sato, Double layer dynamics in a collisionless magnetoplasma, J. Phys. Soc. Japan 54 (1985) 2516;S. Iizuka, H. Tanaka, Radial ion transport due to unstable double layers in a plasma, Plasma Phys. Control. Fusion 27 (1985) 133; N. Sato, M. Nakamura, R. Hatakeyama, Three-dimensional double layers inducing ion-cyclotron oscillations in a collisionless plasma, Phys. Rev. Lett. 57 (1986) 1227; B. Song, R. L. Merlino, N. D’Angelo, Transition from moving to stationary double layers in a single-ended Q machine, Phys. Fluids B 2 (1990) 1936;T. Mieno, M. Oertl, R. Hatakeyama, N. Sato, Electron cyclotron emission from double layers in magnetized collisionless plasmas, Phys. Lett. A 184 (1994) 445];
- plasma produced by means of negative ions, thermonuclear fusion devices [P. M. Bellan, Spheromaks, Imperial College Press, London, 2000;S. Benkadda, T. D. de Wit, A. Verga, A. Sen, ASDEX Team, X. Garbet, Characterization of coherent structures in Tokamak edge turbulence, Phys. Rev. Lett. 73 (1994) 3403;B. B. Kadomtsev, Non-linear phenomena in tokamak plasmas, Rep. Prog. Phys. 59 (1996) 91].

Plasma double layers enjoys a growing interest on the one hand because of complex physical phenomena that lead to their formation and evolution (single or multiple double layers obtained under natural conditions or experimental) on the other hand, due to similarities with structures spatial tasks defined by the cell membrane. As of plasma double layers, the cell membrane plays an important role in the existence of the cell, electric potential, electric field density that such a task has dependent membrane similar to those of a double layer of plasma. Both investigated "seem to respond" similar to the action of various external physico-chemical factors, the evolution (time characteristics of existence), to grow, change and energy field surrounding environment. [E. Lozneanu, M. Sanduloviciu, Minimal-cell system created in laboratory by self-Organization, Chaos, Solitons and Fractals, 18 (2), 335 (2003), D. Cohen, Plasma blobs hint at new form of life, New Scientist, 179, 16 (2003)]

Publications

Monographies:

G. Strat, M. Strat, S. Gurlui, C. Focsa, D. Dimitriu, Self organization in nanomaterials, vol 5, p. 53-91, Ed. INOE, 2007

S. Gurlui, D. Dimitriu, Plasma double layers, ed. TehnoPress, Iaşi, 346 pg., 2005.

ISI papers

M. Colotin, G. O. Pompilian, P. Nica, S. Gurlui, V. Paun, M. Agop, Fractal transport phenomena through the scale relativity model, Acta Physica Polonica A, 116 (2), pp. 157-164 (2009);
S. Gurlui, D.G., Dimitriu, C. Ionita, R.W.Schrittwieser, Spectral investigation of a complex space charge structure in plasma, Romanian Journal in Physics, 54 (7-8), pp. 705-710 (2009);
S. Gurlui, M. Agop, M. Strat, Georgeta Strat, Simona Bacaita and Adina Cerepaniuc, Some experimental and theoretical results on the anodic patterns in plasma discharge, Physics of Plasmas 13, 063503 (2006);
S. Gurlui, M. Agop, M. Strat, Georgeta Strat, Simona Bacaita, Experimental and theoretical inveastigations of the anode double layer, Jpn. J. Appl. Phys. 44, 3253 (2005);
M. Strat, Georgeta Strat, S. Gurlui, Ordered plasma structures in the interspace of two independently working discharges, Physics of Plasmas, 10, 3592 (2003);
M. Strat, G. Strat, On the influence of the external optical radiation upon anode double layers, PHYSICS OF PLASMAS Volume: 8 Issue: 12 Pages: 5296-5302, DOI: 10.1063/1.1416485 (2001)
M. Strat, Georgeta Strat, S. Gurlui, Basic processes in discharge plasma double layers, J. Phys. D: Appl. Phys., 32, 34 (1999);

Non ISI papers

M. Strat, Georgeta Strat and S Gurlui, “Multiple double layers in glow discharges”, Proceedings Supplement of Balkan Physics Letters, vol.5, 4 pagini, (2000).
M. Strat, Georgeta Strat and S. Gurlui, Multiple double layers. Electrical and spectral characteristics, Proceedings Supplement of Balkan Physics Letters, vol.5, p.1287-1290, (2000)
M. Strat, G. Strat, S. Gurlui, “Interactions of Optical Radiation with Anode Double Layers. Optogalvanic Effects”, Balkan Physics Letters , Supp, vol.5, p.1528-1531, (1997)
C. Ionita, S. Gurlui, D. G. Dimitriu, R. Schrittwieser - Spectral investigations of fireballs, International Interdisciplinary-Symposium on Gaseous and Liquid Plasmas, Sendai, Japan, 5-6 September 2008
S. Gurlui, M.Strat, D. Dimitriu, Georgeta Strat and Irinel Grecu," Ultra Sensibility Optical Detectors in Glow Discharge Plasmas", Revista: Buletin of Polytechnical Institut of Iasi, Sectia de Matematica-Mecanica Teoretica- Fizica, Vol. LI ( LV), Fasc. 1-2, 2005.
S. Gurlui, Double layers and biological cell membrane, Buletinul Institutului Politehnic din Iasi, Tomul LI (LV), Sectia de Matematica-Mecanca teoretica- Fizica, supliment Fizica, pg. 55-60, 2005
S. Gurlui, Nonlynear analyses of the anode double layers, Buletinul Institutului Politehnic din Iasi, Sectia de Matematica-Mecanca teoretica- Fizica, Tomul LI (LV), supliment Fizica, pg. 103-112, 2005
M. Strat, S. Gurlui, G. Strat, D. Dimitriu - The study of the influence of the external optical radiation upon the stability of the double layers, Rom. J. Phys. 49 (2004) Nos. 1-2, pp. 81-88
S. Gurlui, M. Strat, G. Strat, C. Agheorghiesei - Study of the interaction of two electrical glow discharges by means the XOOPIC software, Rom. J. Phys. 49 (2004) Nos. 1-2, pp. 89-96
M. Strat, S. Gurlui, G. Strat, D. Dimitriu - Double layers with ionic deep, Rom. J. Phys. 49 (2004) Nos. 5-6, pp. 455-462
M. Strat, Georgeta Strat, S. Gurlui, Optogalvanic effects in anode double layers, Romanian Reports in Physics, vol 54, nr. 1-5, (2002), p. 269
M. Strat, Georgeta Strat, S. Gurlui, “The Study of Excitation and Ionization Processes in Plasma Double Layers”, Romanian Reports in Physics, vol 54, nr. 1-5, (2002), p. 235

National and International Conferences

Silviu GURLUI, Dan-Gheorghe DIMITRIU, Codrina IONITA, Roman SCHRITTWIESER, Spectral investigation of a complex space charge structure in plasma, 9th International, Balkan Workshop on Applied Physics, 2008
S. Gurlui, D. G. Dimitriu, C. Ionita, R. W. Schrittwieser, Spectral investigation of fireballs in argon plasma, Escamping 2008 http://www.escampig2008.csic.es/PosterSessions/151.pdf
S. Gurlui, D. G. Dimitriu, C. Ionita, R.W. Schrittwieser, Spectral Investigation of a Fireball in Low-Temperature Argon Plasma, ICOPS, The 35th IEEE International Conference on Plasma Science, ICOPS 2008
D. G. Dimitriu, S. Gurlui, M. Aflori, L. M. Ivan, International Conference PLASMA-2005, Opole, Poland, on September 6-9, 2005
S. Gurlui, D. Dimitriu, G. Strat, M. Strat, Study of the anode double layers: optogalvanic detetors, International Conference PLASMA-2005, Opole, Poland, on September 6-9, 2005
S. Gurlui, Mitachi Strat, Georgeta Strat and Dimitriu Dan, Double layers and the influence of the external radiation, ICNPAA 2004: Mathematical Problems in Engineering and Aerospace Sciences, The West University of Timisoara, June 2-4, 2004 (SUA)
M.Strat, Georgeta Strat, and S. Gurlui , Theoretical and experimental researches on the structured plasma, IV international Conference Plasma Physics& Plasma Technology, Minsk, Belarus, September, 15-19, 2003
Georgeta Strat, S. Gurlui and M. Strat, On the Formation of Plasma Complex Structures in Argon Glow Discharge , XXVI International Conference on Phenomena in Ionized Gases, July 15-20, 2003, Greifswald, Germany.
Georgeta Strat, M Strat, S. Gurlui and D. Dimitriu, Free double layers in argon glow discharges, BPU-5, Vrnjacka Banja, Serbia and Montenegro, August 25-29, CD-Proceedings , 2003
Georgeta Strat, M. Strat, S. Gurlui and D. Dimitriu, Optogalavanic effect in nonlinear systems, BPU-5, Vrnjacka Banja, Serbia and Montenegro, August 25-29, CD-Proceedings, 2003
M.Strat, Georgeta Strat, and S. Gurlui, “Plasma Complex Structures in Contact Region between Two Negative Glow Discharges”, SPIG, 23- 27 Aug, Sokobania, Yugoslavia, p.321-323, (2002).
M. Strat, G. Strat and S. Gurlui, Plasma complex structures in contact region between two negative glow discharges, 21^st SPIG (Summer School and International Symposium on the Physics of Ionized Gases) SOKOBANJA, Yugoslavia, August 26-30,p. 442-445, 2002
M.Strat, Georgeta Strat and S. Gurlui, “Double Layer Formation in Argon Glow Discharge ”Conference of Plasma Physics and Controlled Fusion”, EPS, 17-21 June 2002 ECA, Montreux, Elvetia, vol. 26 B, P-5.010 (4 pg)
M.Strat, G.Strat, S. Gurlui “The study of the plasma formation which appears in the contact region between two negative glow discharges”, ICPIG, 2001, p. 219-220 (4 coloane), Nagoya, Japonia
M. Strat, Georgeta Strat and S. Gurlui, Spectral investigation of free multple double layers, 20th spig, zlatibor, Yugoslavia, 4 – 8 September, 2000.
M. Strat, Georgeta Strat and S Gurlui, “Multiple double layers in glow discharges”, Fourth General Conference of BPU-4, Veliko Turnova, Bulgaria, 22-25 August 2000
M. Strat, Georgeta Strat, S. Gurlui, “Free Double Layers in Ar Glow Discharges”, XXIV-th International Conference on Phenomena in Ionized Gases, Warsaw, Proceedings, vol. I, P27, p. 53-57; 1999.
M. Strat, Georgeta Strat, S. Gurlui, “QUANTUM PROCESSES IN ANODE DOUBLE LAYERS. OPTOGALVANIC EFFECTS”, 19^th Summer school and International Symposium on the Physics of Ionized Gases, ZLATIBOR, Yugoslavia, August 31-September 4, 1998.
M. Agop, S. Gurlui, M. Strat, Fractal space time and ball lighting as a selforganizing process of a plasma interface, Conferinta Nationala de Fizica Aplicata, CNFA-2006, Iasi.
S. Gurlui, M. Strat, Georgeta Strat, D. Dimitriu, C. Aghiorghiesei, Ordered structure plasma in glow discharge, workshop on fundamental and applied research in physics, “Al I Cuza” University of Iasi, Faculty of Physics, 30 October 2004
Georgeta Strat, S. Gurlui, M. Strat and Irinel Grecu, Ultra Senibility Optical Detectors in Glow Discharge Plasmas, Conferinta Nationala de Fizica Aplicata, Universitatea Tehnica ‘Gh Asachi’ Iasi, Iasi, 4 dec. 2004
M. Strat, S. Gurlui , Georgeta Strat and D. Dimitriu, Double layers. new spectral and electrical investigations, Workshop on Fundamental and Applied Research in Physics, Faculty of Physics, Iaşi, November 2003, Romania.
S. Gurlui, D. Dimitriu, Georgeta Strat and M. Strat, Instability of a double layer under the influence of the external optical radiation, Physics Conference, TIM-03, Timisoara, 28-29 noiembrie, 2003
S.Gurlui, M. Strat, Georhgeta Strat and C. Agiorghiesei, The study of the free multiple double layer using the XOOPIC software, Physics Conference, TIM-03, Timisoara, 28-29 noiembrie, 2003
M. Strat, Georgeta Strat, S. Gurlui, Plasma complex structures in contact region between two negative glow discharges, Conferinta nationala de Fizica si Tehnologii Moderne, Iasi, 2002
M. Strat, Georgeta Strat and S. Gurlui, The study of excitation and Ionization Processes on Plasma Double Layers by means spectral methods, Conferinta nationala de Fizica, Iasi, 2001
M. Strat, Georgeta Strat, S Gurlui, Researches on the dynamics and formation of the multiple double layers, Conferinta Nationala de Fizica, Constanta, 16-18 September 1998
M. Strat, Georgeta Strat, S Gurlui, Studies on the dynamics of the double layers in the case of interactions with electromagnetic radiatiion, Conferinta Nationala de Fizica, Constanta, 16-18 septembrie 1998

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