Abstract
Magnetized plasmas in compact traps may become experimental en-vironments for the investigation of nuclear beta-decays of astrophysical inter-est. In the framework of the project PANDORA (Plasmas for Astrophysics, Nuclear Decays Observation and Radiation for Archaeometry) the research ac-tivities are devoted to demonstrate the feasibility of an experiment aiming atmeasuring lifetimes of radionuclides of astrophysical interest when changing the charge state distribution of the in-plasma ions and the other plasma param- eters such as density and temperature. This contribution describes the multidi-agnostics setup now available at INFN-LNS, which allows unprecedented in-vestigations of magnetoplasmas properties in terms of density, temperature and charge state distribution (CSD). The setup includes an interfero-polarimeter for total plasma density measurement, a multi-X-ray detectors system for X-ray spectroscopy (including time resolved spectroscopy), an X-ray pin-hole camera for high-resolution 2D space resolved spectroscopy, a two-pin plasma-chamber immersed antenna for the detection of plasma radio-self-emission, and differ- ent spectrometers for the plasma-emitted visible light characterization. The setup is also suitable for other studies of astrophysical interest, such as turbulent plasma regimes dominated by the so-called Cyclotron Maser Instability, which is a typical kinetic turbulence occurring in astrophysical objects like magnetized stars, brown dwarfs, etc. A description of recent results about plasma parame- ters characterization in quiescent and turbulent Electron Cyclotron Resonance-heated plasmas will be given.
Highlights
The construction phase of a new experiment finalized at measuring nuclear decays in magnetized plasmas confined in compact traps will start in 2020, supported by INFN
In the framework of the PANDORA project, the development of an innovative diagnostic setup and the improvement of advanced analysis methods are mandatory for two main reasons: 1) an accurate on-line monitoring of all plasma parameters aiming to characterize in detail the plasma environment; on this purpose, an innovative multi-diagnostic setup has been developed, able to investigate the plasma properties in all energetic domains, performing high-resolution spatial and time resolved analysis
The same multi-diagnostic setup is suitable for other studies of astrophysical interest, such as turbulent plasma regimes dominated by the so-called Cyclotron Maser Instability, which is a typical kinetic turbulence occurring in astrophysical objects like magnetized stars or brown dwarfs
Summary
The construction phase of a new experiment finalized at measuring nuclear decays in magnetized plasmas confined in compact traps will start in 2020, supported by INFN. First calculation at ECRIS (ECR ion source) densities and temperatures confirm that even in non-LTE (non-Local Thermodynamic Equilibrium) conditions (due to the low density) the abundances of charge states are - for many of the selected physics cases of astrophysics interest - very similar to the ones occurring in astrophysical conditions, where densities are ten order of magnitude higher [4]. This makes the experiments running in an ECRIS directly scalable to astrophysical systems
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