Numerical investigation of non-homogeneous ECR plasma opacities assuming an external black-body radiation, relevant for astrophysical scenario.

Bezmalinovich M., Emma G., Finocchiaro G., Mauro G.S., Mazzaglia M., Mishra B., Naselli E., Pidatella A., Santonocito D., Torrisi G., Galatà A., Saltarelli A., Simonucci S., Mascali D.
  Giovedì 15/09   09:00 - 13:00   Aula B - Maria Goeppert-Mayer   I - Fisica nucleare e subnucleare   Presentazione
Laboratory plasma may become an attractive environment for making innovative experiments in the context of multi-messenger astronomy. In this scenario, one of PANDORA project's aims consists in measuring, for the first time at $n_e\sim$ 10^$12 {cm^{-3}}$ and $T_{e}\sim$ 1\mbox$--$5 ${eV}$, plasma opacities relevant for addressing the opacity input for the kilonovae signal interpretation. We numerically estimated the electron densities and temperatures of the non-homogeneous laboratory Electron Cyclotron Resonance plasma in Non Local Thermodynamic Equilibrium conditions through a Particle-In-Cell code along 1D line of sight. By passing these and a black-body radiation as input to the population kinetics code FLYCHK, we extracted information on plasma opacity through analysis of emission spectra and level population distributions, first for Ar ions and later for heavy metals like Se, Sr, Zr, Nb. Finally, we studied the behaviour of the out-coming intensity as affected by the opacity from both radiation-perturbed and unperturbed plasma. Results presented offer benchmarks on plasma induced radiation field distortion, in support of laboratory spectral characterizations.