Research of Highly Charged Ions with interest for Astrophysics

Seminário DF

Departamento de Física, Faculdade de Ciências e Tecnologia, Universida NOVA de Lisboa, Campus da Caparica, Portugal

Sala 213 - Edifício I e Online em https://videoconf-colibri.zoom.us/j/344521416?pwd=WVdzSFQ4cXdJT2oyMzdITjlLaDN6Zz09

15 de Março 2023 - 14h

Research of Highly Charged Ions with interest for Astrophysics

Mestre Filipe Grilo (aluno PDFAM)

Laboratory of Instrumentation, Biomedical Engineering and Radiation Physics (LIBPhys-UNL), Department of Physics, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516 Caparica, Portugal

Resumo:

Interpretation of astronomical observations is highly dependant on reliability of the available atomic data. This data is often a key component of astrophysical plasma models, which are important to evaluate the physical proprieties of celestial bodies, such as their electron temperature and density, chemical compositions, etc. Most data currently is originated from outdated theoretical calculations and multiple discrepancies between theory and astronomical observations have been found throughout the last decades. For this reason, there is a great demand by the astronomy and astrophysics communities for up to date and verified atomic databases. Given the wide variety of physical conditions, astrophysical plasmas have a large range of charge states for each element, from single and double ionized ions present in molecular clounds and planetary ionospheres to Highly Charge Ions in coronal and supernova remnant plasmas. The study of highly charged ions requires specialized equipment, namely Storage Rings or Electron Beam Ion Traps (EBIT). Electron-Ion collisional processes for Fe XVII and O VII have been studied in an EBIT with unprecedented electron energy accuracy that enables the observation of resonant processes in the collisional and recombination processes. Moreover, studies are undergoing to observe the EUV spectra on W XIII-XXIX ions. No only this is advantageous for the nuclear fusion community, but also works as a prototype for the study of more complex ions of heavy elements, namely the lanthanoids, which have profound implications on the study of kilonovas.

Filipe Grilo Bio:

Filipe Grilo finished a course in Physics Engineering in 2020 at the NOVA School of Science and Technology, where he was awarded the best in class distinction, and enrolled in a PhD program in Atomic and Molecular physics the following year. From 2019, he started doing research in the LIBPhys-UNL, analysing data from EBIT experiments performed at the Max-Planck-Institut fur¨Kernphysik and contributing with theoretical electron-ion processes calculations. He later joined the institute to continue experimental research on highly charged ions as a visitor researcher. His contributions resulted in the co-authorship of 5 peer-reviewed research papers, 1 first-author paper and with 2 manuscripts undergoing. As part of his PhD, he also participated in beamtimes at the storage ring CRYRING@ESR on the GSI and at the electron synchrotron DESY.