DIAGNOSTICS OF THE ATOMIC SYSTEMS AND PHYSICS OF THE COHERENT FIELDS
Main researcher
: VUJNOVIĆ, VLADIS (53655) Assistants
DEMOLI, NAZIF (87146)
RUKAVINA, JADRANKA (190220)
SKENDEROVIĆ, HRVOJE (182004)
Type of research: basic Duration from: 01/01/91. to 12/31/95. Papers on project (total): 51
Papers on project quoted in Current Contents: 10
Institution name: Institut za fiziku, Zagreb (35) Department/Institute: Department of the physics of ionized gases Address: Bijenička c.46 City: 10000 - Zagreb, Croatia
Communication
Phone: 385 (0)1 271 211
Fax: 385 (0)1 421 156
E-mail: VVUJNOVIC OLIMP.IRB.HR
Summary: Object of study is the relationship between basic
physical parameters and spatial structure of the specific light source. By
using spectroscopic techniques applicable for the source of general optical
thickness, diagnosis was performed of the local conditions in an electric
arc discharge, and mehcanisms were studied which lead to the observed
spectrum. By using numerically sinthesyzed spectra, broadening mechanisms
of mercury spectral lines were investigated. The atomic transition
probabilities were critically compiled for the NeII, ArII, HgI and the same
was started for the Al I,II. The vacuum arc initiation was analysed,
processes which lead to the spectrum at the Balmer limit, and profiles of
hydrogen and helium lines. The interferomeric methods of phase
multiplication in the DC corona discharge were investigated. Using the
extended optical correlator system, the properties of the quasi phase-only
matched spatial filters were analysed. A numerical model was developed and
the condition established for the inverse matched spatial filtering. A
measure was introduced giving an overall estimate of the feasibility of
filters. Methods of optoelectronic pattern recognition were implemented for
the characterization of the cuneiform inscription signs of the Middle
Babylonian epoch.
Research goals: To measure, collect and analyse the atomic
parameters of different elements in neutral and ionized states: the
lifetimes, oscillator strengths, halfwidths, absorption coefficients and
other accessible quantities; to search for systematic trends and
comparisons with theoretical approaches. Aim is to apply diagnostic
methods in order to asses the spatial behavior of temperature and particle
concentrations, and to take into account the plasma optical density.
Results are expected in the form of new or improved data and regularities,
in refined approach and numerical procedures. Further intention is to
analize spatial structure of bodies by methods of coherent optics. In
spectroholography, the spatial resolution improvement of primary fringes,
the possibility of analysing them in real time and with only single
exposure. The development of the numerical methods for the analysis of the
basic measures involved in the definition of complex filters, and the
output correlation signal behaviour. The development of a complex
optoelectronical processor for the recognition and identification of
patterns, based on the original architecture of the extended optical
correlator system. The application of the developed methods and devices
onto characterization of some patterns of interest. Spectroholography
should be applied to study structure of electric discharges. Collection of
atomic parameters should be extended in order to satisfy astrophysical
interests, especially for the stellar atmospheres.
COOPERATION - PROJECTS
Name of project
: JF PN 929 ATOMIC PROCESSES IN LOW-TEMPERATURE
PLASMAS Name of institution: NATIONAL INSTITUTE FOR SCIENCE AND TECHNOLOGY City: WASHINGTON, U.S.A.
Name of project
: ODREĐIVANJE ATOMSKIH KONSTANTI I BRZINA
REAKCIJA PRI POBUĐIVANJU ATOMA I MOLEKULA
(DETERMINATION OF ATOMIC PARAMETERS AND RATE COEFFICIENTS OF
EXCITED ATOMS AND MOLECULES) Name of institution: FIZIČESKIJ FAKUL'TET, UNIVERSITET ST.PETERBURG
(FIZIČKI FAKULTET SVEUČILIŠTA U ST.PETERBURGU) City: ST.PETERBURG, ROSSIJA (RUSIJA)
Name of project
: Quantum-mechanically Complete Experiments with
State-prepared Alkali Atoms Name of institution: Fak.f.Physik, Universitaet Bielefeld City: 33501 - Bielefeld, Njemačka
COOPERATION - INSTITUTIONS
Name of institution
: National Institute of Science and
Technology Type of institution: University/Faculty Type of cooperation: Joint project City: WASHINGTON, U.S.A.
Name of institution
: Naučno issledovateljnyj institut,
Fizičeskij fakuljtet, St.Peterburšskij Universitet Type of institution: University/Faculty Type of cooperation: Joint project City: ST.PETERBURG, ROSSIJA (RUSIJA)
Name of institution
: Humboldt-Universitaet zu Berlin,
Inst.f.Physik, Labor f.Kohaerenzoptik Type of institution: University/Faculty Type of cooperation: Joint publishing of scientific papers
Name of institution
: Inst.f.Experimentalphysik, Technische
Universitaet Graz Type of institution: University/Faculty Type of cooperation: Joint publishing of scientific papers City: 8010 - Graz, Austrija
Name of institution
: Fak.f.Physik, Universitaet Bielefeld Type of institution: University/Faculty Type of cooperation: Joint project City: 33501 - Bielefeld, Njemačka
Name of institution
: Prirodoslovno-matemati;ki fakultet
Sveu;iliŠta u Zagrebu Type of institution: University/Faculty Type of cooperation: Systematic exchange of information City: 10000 - Zagreb, Croatia Other information about the project.