Ovidiu S. Stoican, PhD, experience in the following areas: plasma physics, electrodynamic traps, computational physics, nuclear quadrupole resonance (NQR), diode laser applications, instrumentation and applied electronics
RESEARCH ACTIVITIES
Electrodynamic traps
Study of the electrodynamic traps as a tool used in environment protection, biology, material and solid state physics
Development of new electrodynamic trap geometries
Manipulation of the stored microparticles by using acoustic waves
Microparticles cloud confined along the longitudinal axis of the linear trap
Plasma sources operating at atmospheric pressure and interaction plasma-electromagnetic field
Development of the plasma sources operating at atmospheric pressure, for various practical applications (medicine, biology, environment protection and material processing)
Interaction plasma-microwave field
Application of the plasma antenna technology for rf switches
The head of the plasma jet generator operating at atmospheric pressure during operation
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Electrical supply unit for cold plasma sources
Based on the principle described in "O. S. Stoican, Electrical Supply Circuit for a Cold Plasma Source at Atmospheric Pressure Based on a Voltage Multiplier, Polymers, 13, 2132 (2021)"
an experimental model for a stand-alone system aimed to drive cold plasma sources has been developed. Its operation is equivalent to two dc sources connected in parallel,
used to initiate and sustain the electrical discharge, depending on its state.
The main features of the system are:
plasma jet is generated by means of a pure dc electrical discharge;
no rf or microwave power electronic parts or matching circuits are needed;
automatic switching of the voltage applied to the electrodes depending on the electrical discharge state allows to drive a wide class of plasma generating devices.
The whole design of the system are based on the usual components, electronic boards and materials, commercially available, being ready to be implemented as a product by an innovative start-up.
For details, please contact us.
Experimental model of the electrical supply unit - front panel
PUBLICATIONS
(selection)
A. Journals
O. S. Stoican, Electrical Supply Circuit for a Cold Plasma Source at
Atmospheric Pressure Based on a Voltage Multiplier, Polymers, 13, 2132 (2021)
D. B. Dreghici, B. Butoi, D. Predoi, S. L. Iconaru , O. Stoican, A. Groza, Chitosan-Hydroxyapatite Composite Layers Generated in Radio Frequency Magnetron Sputtering Discharge: From Plasma to Structural and Morphological Analysis of Layers, Polymers, 12, 3065 (2020)
O. S. Stoican, High voltage pulses circuit for generating a plasma plume
at atmospheric pressure, Romanian Reports in Physics, Vol. 71, No. 1, article no. 406 (2019)
O. S. Stoican, Voltage Reversal in Series-connected Three 1.5V AAA Alkaline
Batteries, Int. J. Electrochem. Sci., vol. 14, No. 1, pp. 897 - 904 (2019)
O. S. Stoican, Study on the axial distribution of the stored microparticles in an electrodynamic trap by using software image processing, Rom. Journ. Phys, vol. 61, Nos. 3-4, pp. 536-542 (2016)
O. S. Stoican, Experimental setup aimed to study the electrical impedance variations of a plasma column in a wide frequency range, Romanian Reports in Physics, vol. 66, no. 3, 746-753 (2014)
G. Visan, O. S. Stoican, An experimental setup for the study of the particles stored in an electrodynamic trap, Rom. Journ. Phys.,Vol. 58, Nos. 1-2, pp. 171-180 (2013)
O. S. Stoican, Studies on the Interaction Between an Acoustic Wave and Levitated Microparticles in Waves in Fluids and Solids, Ruben Pico Vila (Ed.), 2011, ISBN: 978-953-307-285-2, InTech
O.S. Stoican, An atmospheric pressure plasma source driven by a train of monopolar high voltage pulses superimposed to a dc voltage, European Physical Journal-Applied Physics, 55, 30801 (2011)
O. S. Stoican, Galvanic isolated voltage source using a single photodiode, Rev. Sci. Instrum. 81, 046102 (2010)
O. S. Stoican, Study of RF Perturbations Due to a Hollow-Cathode Discharge, Rom. Journ. Phys., Vol. 55, Nos. 7-8, pp. 800-805 (2010)
O. S. Stoican, Period shift of a discharge tube relaxation oscillator due to a weak microwave field, Japanese Journal of Applied Physics, 48, 070218 (2009)
O. S. Stoican, Frequency shift of a relaxation oscillator due to an external electrode, Rom. Journ. Phys., Vol. 54, Nos. 3-4, pp. 385-390 (2009)
O. S. Stoican, L. C. Dinca, G. Visan, S. Radan, Acoustic detection of the parametrical resonance effect for a one-component microplasma consisting of the charged microparticles stored in the electrodynamic trap, Journal of Optoelectronics and Advanced Materials, Vol. 10, No. 8, August 2008, pp. 1988 -1990 (2008)
O. S. Stoican, NQR detection setup, Rom. Journ. Phys., Vol. 51, Nos. 1-2, pp. 311-315 (2006)
V. Gheorghe, L. Giurgiu, O. S. Stoican, D. Cacicovschi, R. Molnar, B. Mihalcea, Ordered structures in a variable length a. c. trap, Acta Physica Polonica A, 93, 4, pp. 625-629 (1998)
V. Florescu, S. Patrascu, O. S. Stoican, Systematic study of 1s - ns and 1s - nd two photon transitions of hydrogenlike atoms, Phys. Rev. A, 36, 5, pp. 2155-2166 (1987)
B. Patents
Combined electric-laser system for electric discharge control, RO 133688 (B1) /19-12-2018
System for electric supply of plasma generators, RO 133686 (B1) /06-12-2018
Linear segmented quadrupole trap, RO 132951 (B1) /17-05-2018
System for maintaining solid particles in suspension state, RO 133067 (B1) /07-12-2017
System for detecting ionizing radiation, in real time, with electromagnetic noise protection, RO 131900 (B1) /27-11-2015
System and method for testing the effect of pulsed and synchronized beams of laser accelerated particles, RO 130134 (B1) /28-08-2013
System for maintaining micro and nano particles in levitation state in containers and capilary tubes, RO 129406 (B1) /07-09-2012
Circuit for emitting and receiving radio frequency electromagnetic waves as pulses, RO 123436 (B1) /19-10-2007
C. Patent applications under examination
Circuit for automatic control of a mixed-supply plasma generator operation: RO 132739 (A2) /12-01-2017
Ultrafast electromagnetic pulse generator for simulating electromagnetic pulses associated with the interaction between high-power laser radiation and matter: RO132404 (A2) /23-08-2016
Current research projects
Core program (PN) LAPLAS VI 16N/08.02.2019
International cooperation
COST project: Plasmas applications for smart and sustainable agriculture (PlAgri) CA19110
COST project: Trapped Ions: Progress in classical and quantum applications (TIPICQA) CA17113