Mainz 2022 – scientific programme
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P: Fachverband Plasmaphysik
P 19: Poster II
P 19.42: Poster
Thursday, March 31, 2022, 16:00–17:30, P
Reconstructing the plasma temperature by optical probing method in femtosecond laser hydrogen jet interaction — •Long Yang1,2, Constantin Bernert1,2, Lingen Huang1, Stefan Assenbaum1,2, Martin Rehwald1,2, Karl Zeil1, Ulrich Schramm1,2, Ilja Goethel1,2, Thomas Kluge1, Jan Vorberger1, and Thomas E. Cowan1,2 — 1Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics — 2Technische Universitat Dresden
Plasma temperature is a critical parameter in warm dense matter and unable to be measured directly. In this study, we apply a well-designed experiment to generate an adiabatic expanded, thermalized hydrogen plasma in few ps by 30fs 1.63e18W/cm2 short pulse laser and 5um diameter solid hydrogen jet interaction. With the optical laser probing method at different wave length, the plasma density in expansion process is recorded with optical shadow image. Then plasma temperature is reconstructed by finding the best fit between experiment and hydro with ray tracing simulations. The electron temperature is determined to be around 300eV through this method and compared to the PIC simulations. The results show that both PIConGPU and PICLS overestimate the electron temperature several factors. This is the first time that we design an experiment and benchmark to the PIC codes. The result would help us improve the existed laser plasma interaction model in PIC.