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X-WR-CALDESC:Eventi per Osservatorio Astrofisico di Catania
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DTSTART:20250101T000000
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DTSTART;TZID=UTC:20250409T110000
DTEND;TZID=UTC:20250409T120000
DTSTAMP:20260405T081949
CREATED:20250408T170352Z
LAST-MODIFIED:20250408T170355Z
UID:17939-1744196400-1744200000@www.oact.inaf.it
SUMMARY:Line shape modeling for the characterization of magnetized plasmas in fusion research and astrophysics
DESCRIPTION:Recording: https://www.oact.inaf.it/seminars/ \nDATE: Wednesday\, April 9\, 11:00 a.m. \nORGANIZER: INAF-OACT \nLOCATION: AULA OVEST (INAF-OACT) + remote \nLink for the remote audience:https://meet.google.com/wvf-uwxo-oyj \nSPEAKER: Joel Rosato (Aix-Marseille Université – France) \nABSTRACT:In this talk\, we report on a selection of issues present in the elaboration of spectroscopic models for magnetized plasma diagnostic. A focus is put on tokamak edge and white dwarf atmosphere plasma conditions. In both cases\, the observed spectra exhibit clean lines\, either in absorption or in emission\, denoting the presence of neutral species (atoms). An analysis of the line shape and intensity yields information on the plasma parameters provided a suitable physical model is used. We first discuss in detail the physical mechanisms underlying the broadening of the spectral lines due to the plasma microfield (Stark effect)\, and we next report on models and codes that have been developed in our group at the PIIM laboratory. Applications to the fitting of observed spectra – both in magnetic fusion and astrophysics – are presented. Motivated by current research trends\, we also discuss specific issues related to the presence of strong external magnetic field (Zeeman effect etc.) and report on some recent works done in atomic physics for the improvement of line shape models. \n  \nA few rules:— before joining\, make sure you are using your institutional inaf.it account if you have one (otherwise we will grant you permission to join)— please do not forget to mute your microphone and switch off your webcam when access the virtual room— for questions leave a message in the chat\, the answers at the end of the webinar— the seminar will be recorded\, so if you are interested in it\, please contact us to get the link to the registration.
URL:https://www.oact.inaf.it/event/line-shape-modeling-for-the-characterization-of-magnetized-plasmas-in-fusion-research-and-astrophysics/
LOCATION:Sede A. Riccò\, Via Santa Sofia 78\, Catania
CATEGORIES:Eventi & Seminari
ATTACH;FMTTYPE=image/jpeg:https://www.oact.inaf.it/wp-content/uploads/2025/04/Seminario_Rosato.jpg
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