Photonics Scientific Research Institute of Electrophysical Apparatus named after D. V. Efremov (NIIEFA) is a subject of the State Corporation «Rosatom», before – Federal Agency on Atomic Energy. NIIEFA is located in Saint Petersburg. It is involved in development of: - charged-particles accelerators; - thermonuclear reactors, particularly it participates in the International program ITER; - laser facilities. Director of the Laser Science and Technology Center is Professor, Doctor of Technical Sciences Gennady Alekseevich Baranov. 1. Description of the Laser Center of the NIIEFA Laser Center is equipped with industrial CO2 laser systems of different power (100 W – 15 kW) operating as in CW and inpulse-periodic modes and for different applications. Specialists with many-years practical experience in the area of creation and usage of laser equipment and processing works for the Laser Center. CO2-amplifier of super-atmospheric pressure The results of calculations and experiments showed that the amplifier intended for obtaining 10-um picosecond pulses with a peak power of ~1 TW, which can be used for solving many fundamental and applied problems, must possess the following parameters: Discharge volume, cm…………………… (5-10) 10 100 Interelectrode gap, cm……………………..5…10 Gas mixture composit……………………..CO2:N2:He Gas mixture pressure. atm………….…….5…10 Concentration of molecular gases (%), no less, than…. 15 Specific energy contribution, J/l atm, no less, than….100 Small-signal gain, cm-1 ..no less, than………… 0.02 Repetitively pulsed CO2 laser for medium-mass isotope separation The complex includes a high-power TEA CO2 laser and an isotope separation reactor, in which Freon molecules containing isotope 13C dissociate; the laser and the reactor have a common optical resonator. The implementation of this technology of carbon isotope separation a reliable high-power CO2 laser with the following parameters was built: Radiation wavelength, n……………………………………9.6 Pulse energy, J……………………………………………..20 Energy density at the laser output, J/ cm-2, …..no less than 10 Pulse duration, μs, ………………………….no more than 0.5 Average power, kW……………………………………….4 Pulse repetition rate, Hz…………………………………..200 Production of nano-powder Following the development of technologies of synthesis of nanostructured bulk materials in recent years with improved mechanical parameters and new electromagnetic and optical properties], considerable attention is being paid to the production of nanopowders. At the same time, the technique of vaporisation of materials by laser radiation followed by the condensation of vapor has been known since long and has always attracted attention due to the high purity and small size of the obtained particles, economy and variety of the starting materials. The technology and the facility developed by us allow production of pure nanopowders of complex composition with a quite narrow size distribution of particles using targets made of coarse powders of commercially available chemical compounds or mechanically mixed components Modification of biological objects in water media by CO2-laser radiation We have shown the efficiency of the laser method of depolymerisation of polysaccharides and meta-bolic activation of the yeast culture Saccharomyces cerevisiae by using a CO2 laser for irradiating their water solutions supplied to the interaction region drop by drop. We have shown that galacto-containing low-molecular derivatives of polysaccharides obtained from pectins of the sea grass Zostera and the Iceland moss by laser modification of their water solutions are promising for therapy of chronic persisting infections and stomach and duodenum ulcers. Objective product obtained by the laser activation of the yeast culture is promising for the preventive treatment of immunodeficiency states of human beings subjected to the adverse exposure to ionising radiations, for the prophylactic and complex medical treatment of toxic emphysema, for protecting the organism from injury caused by various biological pathogens, for example, the grippe virus 2.5 MV subnanosecod pulser with laser triggering spark gap for obtaining high current high quality electron bunch This generator was created and delivered to Eindhoven University of Technology, Netherlands, for use in a structure of the research complex for production of 100 fs, 100 pC electron bunches, with an emittance below 1 p mm mrad. It should be used as a pulsed power supply for the injector which is designed to obtain a high-current high quality electron bunch. The characteristics of generator are: - Voltage amplitude on a loading of 100…150 Ohm 2.5 MV - Pulse duration 1 nsec - Leading edge and falling edge of pulse 150 ps - Pulse jitter concerning a laser pulse is no more, than 500 ps 2. The main research activities of the Laser Center of the NIIEFA - Development of laser systems for industry, including radiators and manipulators; - Development of laser medical systems, mainly copper vapor lasers; - Development of shot-pulses (of picosecond length) laser sets on the base of the CO2 amplifiers for fundamental scientific researches; - Development of laser facilities for environmental protection (lidars); - Development of laser processing for industry, and in the first place, laser welding in presence of strong magnet fields; - Development of laser methods of isotopes separation by method of selective multiphotone dissociation, in the first place, producing stable carbon isotope С13; - Researches of as continuous and pulse-periodic laser radiation interaction with matter; - Researches of laser action on bio-objects. They includes as action on polysaccharides and on cells and micro-organisms, так и на клетки и микроорганизмы, first of all on yeast cultures. It is worth to note that a considerable part of listed works was carried-out in collaboration with European (French, German and Sweden) or American enteties in frames of projects funded by the International Science and Technology Center. 3. Research activities where co-operation is sought and where we already have good achievements 1. Laser modification of biological objects and carbon materials for creation of protection means against bio-pathogens and toxic chemical agents. 2. Development of high-power (Terawatt power level and picoseconds pulse length) laser facility on the base of high-pressure CO2-amplifiers for research of interaction between laser radiation and matter. 3. Joint use of the stable carbon isotope С13 in biology and medicine, first of all in respiratory tests for noninvasive diagnostics of a wide range of deceases of human viscera. Prof. Gennady Alekseevich Baranov Director of the Laser Science and Technology Center of the Efremov Scientific Research Institute of Electrophysical Apparatus Contact us: •Address: Doroga na Metallostroy 3, Metallostroy, Saint Petersburg, 196641 Russia •Tel.: (7-812) 464-81-31; (7-812) 464-44-58 •Fax: (7-812) 464-46-53 •E-mail: email@example.com Main papers concerning the photonics topic: •D. V. Afanas’ev, G. A. Baranov, A. A. Belyaev, et al. Pisma Zh. Tekh. Fiz , 27,10 (2001) (in Russian). •A. V. Astakhov, D. V. Afanas’ev, G. A. Baranov, et al. Voprosy Atomnoy Nauki i Tekhniki, Ser. Electrophisicheskaya Apparatura, 1 (27). 46-51 (2002) (in Russian). •G.A.Baranov, A.A.Belyaev, S.A.Smirnov, et al. Pisma Zh. Tekh. Fiz., 28, 25 (2002). •G.A.Baranov, A.A.Belyaev, S.A.Smirnov, et al. Pisma Zh. Tekh. Fiz., 29, 57 (2003). •G.A.Baranov, A.A.Belyaev, S.A.Smirnov, et al. Quantum Electronics 35(9) 867-872 (2005) •G.A.Baranov, A.A.Kuchinsky. Quantum Electronics 35(3) 219-229 (2005) •A.V. Astakhov, G.A.Baranov, A.A.Belyaev, et al. Voprosy Atomnoy Nauki i Tekhniki, Ser. Electrophisicheskaya Apparatura, 3 (29), 80-84 (2005) (in Russian). •G.A. Baranov, V.V.Khukharev. Novye Promyshlennye Tekhnologyi 5, 46-48 (2005) (in Russian).