| Center for Experimental Physics |
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| Welcome to the home page of the Center for Experimental Physics, a division
of the Belgrade Institute of Physics. The main obective of the Center for
Experimental Physics is to apply experimental techniques and models to the
study of fundamental processes in physics, chemical physics and atmospheric
physics and chemistry. In addition the CEP is host to a number of applied
physics projects. |
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| Laboratories: |
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| Laboratory for Multidisciplinary
Research |
| Laboratory for Atomic,
Molecular and Laser Spectroscopy |
| Laboratory for Gaseous Electronics |
| Laboratory for Plasma Spectroscopy |
| Laboratory for Plasma Physics
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| Atmospheric Physics Laboratory |
| Environmental Protection
Laboratory |
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| Director: Dr Zoran Lj. Petrovic |
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| The central activity of the Laboratory
for Multidisciplinary Research is the study of high pressure effects
on the optical features of lasers and of various materials. Other activities
include the investigation of the effects of external influences such as
electric fields, high pressure, nicotine and strress on light absorptin
of plants. The experimental techniques utiliyed include optical emission
spectroscopy, photo-acoustic spectroscopy, systems for the generation of
high pressure. |
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| The Laboratory for Atomic,
Molecular and Laser Spectroscopy is involved in the investigation of
multi-photon processes in SF6 molecules induced by CO2
lasers in the presence of buffer gases. Excitation and relaxation processes
under the effect of typical buffeps such as Ar atoms and CH4
and N2 molecules are being investigated with the purpose of determining
optimal multi-photon absorption processes for SF6. Experimental
techniques include laser absorption and photo-aboustic spectrroscopy. |
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| The Laboratory for Gaseous
Electronics investigates the physics of electron and ion swarms. Measurements
are made of excitation and transport coefficients and of distribution functions.
The work on swarms includes the development of momentum transfer theory
for swarm transport in mixtures of reaction gases, as well as Monte Carlo
simulations for non-equilibrium and non-local transport in DC and RF fields.
The experimental data is used in conjunction with numerical techniques to
solve Boltymann equations and to determine electron scattering cross sections.
Experimental techniques include spatially resolved emission spectroscopy
and particle energy analysis. Basic properties of gas discharges such as
volt-ampere characteristics, constructions, oscillations, self organiyation
and excitation kinetics are studied by applying field measurements, optical
emission spectroscopy, mass and energy analysis and laser absorption and
scattering. These techniques are applied to low current Town-send regime
discharges, normal glow discharges, capacitively and inductively coupled
RF discharges, microwave discharges and pseudo sparks. Some aspects of plasma
chemistry and surface and applied point of view. In particular: this includes
plasma etching, plasma cleaning as well as modification of surface properties
and plasma deposition of thin diamond like films. There is also an ongoing
study of plasmas for light sources. Some aspects of fundamental atomic and
molecular physics including trapping and laser cooling of ions and atoms
are studied through an international collaboration. |
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| The main activity of the Laboratory
for Plasma Spectroscopy is the investigation of basic processes that
influence the excitation of trace elements in different discharge sources
(arcs, inductively coupled argon plasma) with the purpose of decreasing
the detection boundary and increasing precision. In addition new methods
in analytical spectroscopy are being developed and applied in the determination
of various elements in different bases. Modeling of processes in spectroscopic
plasma sources supplements the experiments that are mostly based on high
resolution emission spectroscopy. |
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| The Laboratory for Plasma
Physics studies the kinetic and optical properties of low temperature
plasma. A central place in the work is the development of quantum mechanical
and semi-classical methods for detelrmining the kinetic coefficients of
fully ioniyed plasmas in external fields. Also studied are the effects of
electrostatic screening on the emission and absorption spectra of non-ideal
plasmas. There is an ongoing study of a group of collision processes that
play an important role in low temperature laboratory and astrophysical plasmas.
This includes radiation and ioniyation recombination processes in ion-atom
and electron-ion-atom collisions. |
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| The Atmospheric Physics Laboratory
studies high current electric discharges and the processes generated in
them, as well as the optical and electrical characteristics of the plasmas
created in these discharges The laboratory also studies pollution sources
as well as the transport of pollutants. Another field of interest centers
on luminescence technologies including sources, methods of measurlement
and specific devices. |
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| The Environmental Protection
Laboratory develops special devices and methods for the detection pf
pollutants in ambient air. Transport and transformation processes of micro
constituents and polutants in the lower troposphere are investigated. The
development of physical methods of aerosol characteriyation is continuously
carried out with the aid of a pure room (pureness of 100) and the corresponding
diagnostic techniques. All these activities lead to the preparation of a
systlematic study of the processes of exchange of microconstituents and
pollutants in the atmosphere and biosphere. The project is a part of an
international effort to monitor air pollution in Europe. A further project
is to develop methods for the detection of toxic, explosive and polluting
gases. |
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| Institute of Physics home page |
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