BEGIN:VCALENDAR VERSION:2.0 PRODID:-//linuxsoftware.nz//NONSGML Joyous v1.4//EN BEGIN:VEVENT SUMMARY:Ultrafast imaging of relativistic instabilities in solid-density p lasmas DTSTART:20250218T113000Z DTEND:20250218T130000Z DTSTAMP:20260906T185949Z UID:0f36e519-dd1b-48a8-96f0-7b75cf399ee1 SEQUENCE:1 CREATED:20250213T112158Z DESCRIPTION: The streaming of relativistic charged particles gives ris e to kinetic instabilities that magnetize astrophysical and laboratory  plasmas. These (collective) fields impact plasma dynamics and their stud y is critical to a wide range of systems\, from cosmic-ray transport in g alaxies to the solar wind to fusion plasmas. Despite their importance\ , the direct experimental characterization of these instabilities has r emained a challenge. I will discuss the results from experiments comb ining a high-intensity optical laser with a high peak-brightness X-ray la ser at LCLS that successfully imaged relativistic kinetic instabilitie s in solid-density plasmas with an unprecedented spatial and temporal resolution of 200 nm and 50 fs. The measured plasma density evolution\, together with supporting theoretical analysis and kinetic simulations\,  reveal a unique interplay between space-charge\, resistive effects  and ion dynamics on the development of the instabilities. These finding s further indicate that magnetic fields on the order of 1000 Tesla are produced\, which help confine high-energy electrons with important impli cations for the transport of energetic particles in plasmas. LAST-MODIFIED:20250213T112158Z LOCATION:Anfiteatro PA2 (Piso -1 do Pavilhão de Matemática) do IST URL:http://df.vps.tecnico.ulisboa.pt/en/events/ultrafast-imaging-of-relati vistic-instabilities-in-solid-density-plasmas/ X-ALT-DESC;FMTTYPE=text/html:

The streaming of  relativistic charged particles gives rise to kinetic instabilities tha t magnetize astrophysical and laboratory plasmas. These (collective) fi elds impact plasma dynamics and their study is critical to a wide range o f systems\, from cosmic-ray transport in galaxies to the solar wind to fu sion plasmas.

 Despite their importance\, the direct experim ental characterization of these instabilities has remained a challenge.  I will discuss the results from experiments combining a high-intensit y optical laser with a high peak-brightness X-ray laser at LCLS that su ccessfully imaged relativistic kinetic instabilities in solid-density p lasmas with an unprecedented spatial and temporal resolution of 200 nm  and 50 fs.

The measured plasma density evolution\, together  with supporting theoretical analysis and kinetic simulations\, reveal a unique interplay between space-charge\, resistive effects and ion dyna mics on the development of the instabilities. These findings further  indicate that magnetic fields on the order of 1000 Tesla are produced\, which help confine high-energy electrons with important implications for the transport of energetic particles in plasmas.

END:VEVENT END:VCALENDAR