ELECTRON-IMPACT BROADENING OF Cu IV LINES FOR THE DIAGNOSTIC OF THE ARC PLASMA OF ELECTRODYNAMIC MACRO-PARTICLE ACCELERATOR

En utilisant une méthode modèle pour la simulation des pertes sur les surfaces limites, on a calculé la température et la composition du plasma de l'arc dans l'accélérateur électrodynamique des macro particules, initié par l'évaporation d'une plaque du cuivre. La largeur stark diagnostique de plasma de l'arc, ont été calculées en utilisant la méthode semiempirique modifiée.Using a model method of loss energy simulation on the boundary surfaces, temperature and composition of an electrodynamic macroparticle accelerator arc plasma created by the evaporation of a Cu foil, have been calculated. Stark widths for Cu IV lines of interest for the arc plasma diagnostic have been calculated also, by using the modified semiempirical method

Experimental verification of theoretical calculations of the static electrical conductivity in moderately non-ideal helium plasmas produced in flashlamps

We present an experimental verification of the semiclassical theory [l] for static conductivity calculations in the case of moderately non-ideal plasmas which has been developed as a more simple approximation than the quantuum-mechanical theory based on the RPA method [2,3]. Such plasmas are produced in linear flashlamps (inner diameter 5mm, inter-electrode length 100mm) filled with pure helium and are characterized by on axis electron densities in the range 2. 1017 – 1.7 . 1018 cm-3 and temperatures around (2-3) x 104K, giving a plasma parameter Γ close to 0.1. Different methods of diagnostics based on measurements of continuum intensities, neutral line intensities and opacities (taking into account the effect of the statistical ionic microfields on the atomic levels), and infrared laser interferometry (3.39 µm), are applied to determine the radial profiles of particles and temperature. Profiles so deducted are relatively flat and show a good filling of the plasma inside the flashlamp. Such experimental conditions coupled with precise measurements of the discharge electrical parameters (current intensity and electrical field) allow for a reliable evaluation of the validity of this semiclassical theory. Finally, for each case, the impedance of the plasma so calculated is in good agreement with the experimental value, proving the validity of the semiclassical theory, and thereby of the RPA theory in our plasmas

BEAMDB and MolD – databases for atomic and molecular collisional and radiative processes: Belgrade nodes of VAMDC

Abstract: We present two atomic and molecular (A&M) databases, MolD and BEAMDB, hosted by the SerVO – the Serbian virtual observatory (http://servo.aob.rs). These databases and web applications have been implemented in accordance to the standards developed by Virtual Atomic and Molecular Data Centre (VAMDC, http://www.vamdc.eu). The MolD database contains photo-dissociation cross-sections for individual rovibrational states of the diatomic molecular ions and rate coefficients for the atom-Rydberg atom chemi-ionisation and inverse electron-ion-atom chemi-recombination processes. The Belgrade electron/atom(molecule) database (BEAMDB) provides collisional data for electron interactions with atoms and molecules. Differential cross sections (DCS) are presented for both elastic and inelastic (excitation) cross sections in tabulated data tables. These DCS data are integrated over a full range of scattering angles in order to achieve integral, momentum transfer and viscosity cross sections as functions of impact electron energy. Beside these tables, energy loss spectra are presented in the graphical form