Dr. Valentin Pohoata Department of Optics and Spectroscopy,  Faculty of Physics,  "Al. I. Cuza" University Blvd. Carol I, no. 11, Iasi 700506, ROMANIA Phone: (+40) 232-201194 Fax: (+40) 232-201150 E-mail: vpohoata@uaic.ro

2. Data nasterii: 28.decembrie.1973

3. Stare civila: Căsătorit

4. Studii:

5. Experienta profesionala:

6. Specializari in strainatate:

-1 martie 1999 – 30 septembrie 1999 – Institut fur Ionen Physik, Innsbruck Austria

- 17 noiembrie 1999 – 28 decembrie 1999 – Institut fur Ionen Physik, Innsbruck Austria

- 20 iunie – 31 iulie – Jozef Stefan Institute, University of Ljubljana, Slovenia

- 17 ianuarie 2002 – 14 iulie 2002 - Institut fur Ionen Physik, Innsbruck Austria

- 01 august 2003 – 30 sept. 2003 - Institut fur Ionen Physik, Innsbruck Austria

8. Limbi straine cunoscute: Engleza
 

9.1. Lita lucrări publicate în Reviste Internaţionale cotate ISI

Roman Schrittwieser, Codrina Avram, Petru Balan, Valentin Pohoata, Cristina Stan, Mircea Sanduloviciu -New insights into the formation of nonlinear space charge structures in various plasmas- Physica Scripta, vol. T84, 122-127, (2000)
ISI 0.578/6=0.096

R. Schrittwieser, C. Ionita, P.C. Balan, Jose A. Cabral, F.H. Figueiredo, V. Pohoata, C. Varandas, -Application of emissive probes for plasma potential measurements in fusion devices- Contrib. Plasma Phys. 41, 494 (2001)
ISI 0.846/8=0.106

Mihaela Pascu, Cornelia Vasile, G. Popa, I. Mihaila, V. Pohoata, "Modification of Polymer Blends Properties by Plasma/Electron Beam Treatment. I. Plasma Diagnosis and Bulk Properties of Plasma Treated Blends" International Journal of Polymeric Materials, Volume 51, Numbers 1-2 / January-February (2002), p. 181 - 192
ISI 0.34/5=0.068

T.Gyergyek, M. Cercek, R. Schrittwieser, C. Ionita, G. Popa, V. Pohoata -Experimental Study of the Creation of a Fire-rod II: emissive probe measurements- Contrib. Plasma Phys. 43, No 1, 11-24 (2003)
ISI 0.846/6=0.141

Valentin Pohoaţă, Gheorghe Popa, Roman Schrittwieser, Codrina Ioniţă, Milan Čerček -On the properties and control of the anode double layer oscillations and related phenomena- Phys. Rev. E. vol 68, issue 1, 016405, july 2003.
ISI 2.24/5=0.448

G. Strat, E. Buruiana, T. Buruiana, V. Pohoata, M. Strat "Fluorescence properties of the polyurethane with anchored stilbene chromophore" Journal of Otoelectronics and Advanced Materials Vol. 7, No. 2 , April 2005, p. 925-928
ISI  0.27/5=0.05

9.2.  Lucrări publicate în Reviste Internaţionale ne-cotate ISI 

Alina S. Chiper, V. Anita, C. Agheorgiesei, V. Pohoata, Maria Anita, G. Popa, - Spectroscopic diagnostics for a DBD plasma in He/Air and He/N2 gas mixture- Plasma Process. Polym.  1, 57-62, 2004

9.3.   Lucrări publicate în Reviste Naţionale recunoscute CNCSIS

V. Pohoata, I. Mihaila, M. Toma – The influence of secondary electrons on space charge structures in a d.c. glow discharge, An. St. Univ. Iasi, T.XLVI, Fizica plasmei si spectroscopie, p.209-212, 2000
 
I. Mihaila, V. Pohoata,  M. Toma – Role of a nonuniform magnetic field on the generation and disruption of the space charge structures, An. St. Univ. Iasi, Tomul.XLVI, Fizica plasmei si spectroscopie, p.55-59, 2000
 
Cornelia Mircea, V. Pohoata, Gh. Singurel, Luminita Agoroaei, Claudia Butnaru, Elena Butnaru, “Analiza aflatoxinelor B2 si G2 prin spectrofluorometrie“ Revista de Medicina si Farmacie, Universitatea de Medicina si Farmacie Targu-Mures, 2004, vol. 50, pag. 256

9.4. Lucrări prezentate / publicate în volumul unor Conferinţe Naţionale şi Internaţionale

V. Pohoata, I. Mihaila and M. Toma “THE INFLUENCE OF SECONDARY ELECTRONS ON SPACE CHARGE STRUCTURES IN A DC GLOW DISCHARGE” -The X^th International Conference in Plasma Physics and Applications, June 4 – 7 1998, Iasi, Romania

Mihaila, V. Pohoata and M. Toma “ROLE OF A NONUNIFORM MAGNETIC FIELD ON THE GENERATION AND DISRUPTION OF THE SPACE CHARGE STRUCTURES” -The X^th International Conference in Plasma Physics and Applications, June 4 – 7 1998 , Iasi, Romania

M. Toma, V. Pohoata, I. Mihaila and Ioana-Alexandra Rusu “CONTRIBUTION ON THE MAGNETIC FIELD ROLE IN THE FORMATION AND EVOLUTION OF THE SPACE CHARGE STRUCTURES”, “Fundamental and Applied Researches in Physics”, Short Communications, Scientific Days of “A.I.Cuza” University, October24th, 1998, Iasi

M. Toma, V. Pohoaţă, I. Mihăilă, Ioana-Alexandra Rusu – “Contribuţii asupra rolului câmpului magnetic în formarea şi evoluţia structurilor de sarcină spaţială”, Sesiunea ştiinţifică “Cercetări fundamentale şi aplicative în domeniul fizicii”, 24 Octombrie 1998, Iasi , Romania

I. Mihăilă, V. Pohoaţă, M. Toma – “About the correlation among discharge current versus magnetic field characteristic and self-organised space charge structures in gas discharge plasma”, The XXIVth International Conference on Phenomena in Ionized Gases, July, 11-16, 1999, Warsaw, Poland

V. Pohoata, Ioana Alexandra Rusu, I. Mihaila, M. Toma “ANALYSIS OF LOW-FREQUENCY SELF-SUSTAINED OSCILLATIONS IN LOW-TEMPERATURE PLASMA CREATED BY AN ELECTRON BEAM INJECTION” XXIVth International Conference on Phenomena in Ionized Gases, July 1999, Warsaw, Poland

N. Dumitrascu, G. Borcia, V. Pohoata and G. Popa “CORONA DISCHARGE TRATAMENTS OF PVC FILMS USED IN MEDICAL APPLICATIONS” The 14^th International Symposium on Plasma Chemistry, August 2-6 1999, Prague, Czech Republic

Mihaela Pascu, Gh. Popa, I. Mihaila, V. Pohoata, "Modifications of polymer properties by treatment in an argon plasma. I. Plasma diagnosis and bulk properties", Proceedings 14-th International Symposium on Plasma Chemistry, Volume IV, Edited by: M. Hrabovsky, M. Konrad and V. Kopecky, Institute of Plasma Physics Academy of Sciences of the Czech Republic, pp. 1871-1876, 1999.

R. Schrittwieser, C. Avram (Ionita), P.C. Balan, V. Pohoata, M. Sanduloviciu, C. Stan, "New insights into the formation of nonlinear space charge structures in various plasmas", International Topical Conference on Plasma Physics: New Frontiers in Nonlinear Science (Faro, Portugal, 1999),

V. Pohoata, M. Cercek, R. Schrittwieser, G. Popa “ANODIC DOUBLE LAYER OSCILLATIONS AS A SOURCE FOR ION-ACOUSTIC WAVES “XXVII-th Europhysics Conference on Plasma Physics and Controlled Fusion, Budapest, 11-15 juin 2000, Abstracts of Invited and Contributed Papers, 1296-1299(2000)

Codrina Avram, Petru C. Balan, Jos A. Cabral, Fernando H. Figueiredo, Valentin Pohoata, Roman Schrittwieser, Carlos Varandes “Plasma potential measurements in the edge plasma region of a small tokamak by means of electron emissive probes” “XXVII-th Europhysics Conference on Plasma Physics and Controlled Fusion, Budapest, 11-15 juin 2000, Abstracts of Invited and Contributed Papers, Vol 24B p. 828-831 (2000)

G. Popa, V. Pohoata, R. Schrittwieser, “Ion-beam mode wave excited in a DP-machine system” National Physics Conference Abstracts, Constanta, 79 (2000)

M. Toma, I. Mihaila, V. Pohoata, B. Horchidan, “Fast electrons and anodic nonstationary space charge structures” National Physics Conference Abstracts, Constanta, 78 (2000)

M. Toma, Silvia Alina Paraschivescu, V. Pohoata, “Effects of secondary electron emission on a metallic electrode potential” National Physics Conference Abstracts, Constanta, 78 (2000)

R. Schrittwieser, C. Ionita, P.C. Balan, J.A. Cabral, F.H. FIgueiredo, V.Pohoata, C. Varandas, “Application of emissive probes for plasma potential measurements in a fusion device” 4-th International Workshop on Electrical Probes in Magnetized Plasmas, Berlin, Germany, May 30-31 2000

Petru C. Balan, Valentin Pohoata, Valerian Ignatescu, Dan G. Dimitriu, Codrina Ionita, Roman Schrittwieser, Mircea Sanduloviciu and Carlos Hidalgo "Flicker noise at the edge of a magnetized alkali plasma column" , Proceedings of the 10-th ICPP (International Congress of Plasma Physics), Oct. 23-27, 2000, Quebec City, Canada, pag.65

Roman Schrittwieser, Petru C. Balan, Valentin Pohoata, Jose A. Cabral, Fernando H. Figueiredo, Codrina Ionita, Carlos Varandas "Emissive probes for plasma potential measurements in the edge plasma region of a small tokamak", Bulletin of the American Physical Society, the 42-th Annual Meeeting of the Divison of Plasma Physics, Oct.23-27 2000, Quebec City, Canada, vol 45, No.7, pag.78, poster nr.CP1 77

Codrina Ionita, Petru C. Balan, Valentin Pohoata, Roman Schrittwieser, Daniela Strele, Peter Krumm "The electrostatic ion-cyclotron instability in a magnetized C60 plasma", Bulletin of the American Physical Society, the 42-th Annual Meeeting of the Divison of Plasma Physics, Oct.23-27 2000, Quebec City, Canada, vol 45, No.7, pag 305, poster nr. UP1 26

M. Sanduloviciu, R. Schrittwieser, E. Lozneanu, C. Avram (Ionita), P. Balan and V. Pohoata, "Flicker noise related to electrical double layer dynamics", Journal of Plasma and Fusion Research SERIES 3 (2000), 614 - 617,

M. Toma, Ioana-Alexandra Rusu, V. Pohoata, Alina Paraschivescu – About the dependence of the electron drift velocity opnm the axial; electric field in a positive column, National Phys. Conf. Abstract, Iasi, 2001, p.156

M. Toma, Ioana-Alexandra Rusu, V. Pohoata, I. Mihaila – Equivalent effect of neutral bas pressure and transverse magnetic field on low pressure glow discharge plasma, Proc.XI-th Conf.on Plasma Phys. and Applications, Constanta, p.62-65, sept. 2001

V. Pohoata, Gh. Popa, M. Cercek, T. Gyergyek “Ion distribution function on the low potential side of a fire-rod bounded by a double layer”, CNF Constanta 2001, p 173

R. Schrittwieser, J. Adamek, P. Balan, M. Hron, C. Ionita, K. Jakubaka, L. Krystaka, E. Martines, V. Pohoata, J. Stockel, M. Tichy, G. Van Oost, “Measurements of the plasma potential with emissive probe in the CASTOR Tokamak”, XXV-th ICPIG, Nagoya – Japan, 2001

R. Schrittwieser, J. Adamek, P. Balan, M. Hron, C. Ionita, K. Jakubaka, L. Krystaka, E. Martines, V. Pohoata, J. Stockel, M. Tichy, G. Van Oost, “Plasma potential measurements with emissive probes in the CASTOR Tokamak” 28 EPS conference on Contr. Fusion and Plasma Phys. Vol. 25A p. 409-412, 2001, Madeira, Portugal.

V. Pohoata, Gh. Popa, R. Schrittwieser, Codrina Ionita, P. C. Balan “A new method of controlling fireball oscillations” ESCAMPIG-Grenoble, 2002

V. Pohoata, Gh. Popa, R. Schrittwieser, Codrina Ionita Time resolved measurements of plasma potential across an anode double layer, Conferinta Nationala de Fizica, Targu Mures, 2002

Valentin POHOAŢĂ, Gheorghe POPA, Roman SCHRITTWIESER and Codrina IONIŢĂ, Electronic circuits during oscillations of an anode double layer, ICPIG 2003 July 15-20 Greifswald Germany, Vol IV. Pag 155.

E. Lozneanu, V. Pohoata, S. Popescu, M. Sanduloviciu, Self-organization acting as physical basis for stimulation of oscillations in plasma devices. ICPIG 2003 July 15-20 Greifswald Germany, Vol IV. Pag 193.

Gabriela Ciobanu, A. Rotaru, V. Pohoata, G. Singurel, - Fluorescence datermination of Indolizine’s Derivatives - Revista V. Adamachi, Vol. XII, Nr 1-4, Pag. 144, 2004

Irina Trifanov, Diana Ciolacu, Cornelia Vasile, V. Pohoata, G. Singurel, - The study of drug release-controlled systems using UV-VIS spectroscopy - Revista V. Adamachi, Vol. XII, Nr 1-4, Pag, 147, 2004

Ana Garlea, V. Pohoata, G. Singurel, V. Melnig, - Fluorescence anisotropy characterization of polymers- , Revista V. Adamachi, Vol. XII, Nr 1-4, Pag. 153, 2004

11. Research Devices

Device	Technical specifications
UV/VIS Spectrophotometer Perkin-Elmer Lambda 3	Specifications:   - Spectral band width 2 nm;   -Wavelengths range 190-900 nm.   -Wavelength accuracy 0.2 nm Samples:      - Liquid (quvette of 1, 10mm)      - Solid state (thin layers) Measurement Options:     - Single measurements     - Absorption spectrum Data Acquisition: - Automatic using DAS-1600 acquisition board and PC.
SLM 8000 Spectrofluorimeter	SLM Specifications: - Light source: 450 Watt Xenon arc lamp. -Wavelength range: 200-900 nm. - Bandpass 0.5, 1, 2, 4, 8, 16 nm. - Wavelength accuracy 0.2 nm. - PMT voltage range: 250-1275V. - Photon Counting Detection. Samples:  - Liquid (quvette of  10mm) - Solid state (thin layers) Measurement Options: - Excitation spectrum - Emission spectrum - Time-based measurements with a time accuracy of 0.1s. - Anisotropy Measurements. - Polarisation Optics Data Acquisition: Automatic using a SLM8000 acquisition system and PC.
BOMEM MB-Series 104 - FTIR Spectrometer	BOMEM Specifications: -IR Wavelength range:                 4000-500cm-1; Measurement Options: - Absorption /Transmission spectrum; - ATR technique (attenuated total reflectance); - Polarisation Optics -  linear dichroism; - Temperature depended from 200  to +250°C; Samples: - Liquid; - Solid (thin layers or incorporated in KBr capsule); Gas (length quvette 10 cm); Data Acquisition: Automatic using a Grams -Bomem  acquisition software and PC
ORIEL MS 125 Spectrograph Oriel  Instaspec diode array detector	ORIEL Specifications: -Wavelength range: 190-900 nm. - Spectral band width 1 nm; -CCD array as detector               (1024 elements); Measurement Options: - Emission spectrum; - Time-based measurements . Data Acquisition: -Automatic using a ORIEL  acquisition software and PC
Perkin Elmer LS-3 Fluorescence Spectrophotometer	Specifications: - Light source:  Xenon arc lamp. - Wavelength range:             excitation 230 - 720 nm;             emmision 250 - 800 nm. - Bandpass  5, 10,  20 nm. Samples:  - Liquid (quvette of  10mm). Measurement Options: - Excitation spectrum - Emission spectrum - Time-based measurements with a time accuracy of 0.1s. Data Acquisition: - Automatic using DAS-1600 acquisition board and PC.
Excimer laser  - XeCl Lambda Physik LPX100	Specifications: Pulsed Ultra-Violet laser - 308 nm;     - pulse duration - 10ns ;     - pulse repetition 1-25Hz;     - pulse energy 25 to 150 mJ;     - laser beam with- 3cm diameter;     - spectral line width 1nm.
Fluorescence Microscope	Specifications: - Light source:  Xenon arc lamp. - Excitation Wavelength :3 filters for  380nm , 410nm and 440nm;  - Samples: - Thin layers on glass slides -  Acquisition: Automatic using a photographic film camera (35mm) or a digital camera.

Michelson Interferometer