ELFT HÍRADÓ

[Szeminárium koordinátor <sem-admin AT szfki.hu>]

SZFI SeminarSlattery-Major ZsuzsannaGSI Helmholtzzentrum für 
Schwerionenforschung GmbH, Darmstadt, Germany; Helmholtz-Institut Jena, 
Germany (host: Dombi Péter)Laser-driven X-ray diagnostics for 
heavy-ion-heated matterTuesday, 29 April 2025, 10:00, KFKI Campus, Bldg. 1, 
2nd floor, Conference Room    The study of matter at high-energy-density 
(HED) conditions is relevant to the understanding of compact astrophysical 
objects, and crucial for applications such as inertial confinement fusion. 
For producing such extreme states of matter in the laboratory, volumetric 
heating by intense pulses of heavy ions offers a novel approach (compared to 
more established drivers such as high-energy lasers), allowing to heat large 
sample volumes on the mm3 scale, with small gradients, on comparably long 
time scales, and near thermal equilibrium. The future FAIR facility in 
Darmstadt will provide powerful pulses of heavy ions with unprecedented 
intensity, allowing to reach eV temperatures and Mbar pressures. The plasma 
physics collaboration HED@FAIR will exploit these unique capabilities for its 
HED science program.    State-of-the-art diagnostic techniques in HED science 
experiments often involve powerful laser-generated X-ray pulses, produced by 
high-intensity laser pulses, to probe the short-lived dense samples, and are 
consequently also envisaged to complement the experimental capabilities at 
FAIR. To this end, we have recently exploited the already available 
infrastructure at GSI, which allows to use the ion bunches from the SIS18 
heavy-ion synchrotron in combination with the ns-pulse of the high-energy 
laser facility PHELIX at the HHT (high-energy high-temperature) experiment 
area, in order to demonstrate the feasibility of laser-driven X-ray 
diagnostics of heavy-ion-heated matter within the FAIR Phase-0 research 
program. We have commissioned and applied laser-driven X-rays for 
investigating heavy-ion heated matter through X-ray diffraction, X-ray 
Thomson scattering and X-ray absorption spectroscopy. This platform allows 
for the observation of phase changes induced by the heavy-ion beam and 
volumetric temperature measurements of the heated sample.    After giving an 
overview of the PHELIX facility and its capabilities, I will present first 
findings from our combined heavy-ion high-energy-laser 
experiments. Minden érdeklődőt szívesen látunk! - Everyone is welcome to 
attend.Attila Nagysem-admin AT szfki.hu