Revealing non-equilibrium and relaxation in laser heated matter

0585182 - FZÚ 2025 RIV NL eng J - Journal Article
Vorberger, J. - Preston, T.R. - Medvedev, Nikita - Boehme, M.P. - Moldabekov, Z.A. - Kraus, D. - Dornheim, T.
Revealing non-equilibrium and relaxation in laser heated matter.
Physics Letters. A. Roč. 499, Mar (2024), č. článku 129362. ISSN 0375-9601. E-ISSN 1873-2429
R&D Projects: GA MŠMT LTT17015; GA MŠMT(CZ) LM2023068; GA MŠMT(CZ) EF18_053/0016627
Grant - others:OP VVV - Mobility FZU 2(XE) CZ.02.2.69/0.0/0.0/18_053/0016627
Research Infrastructure: e-INFRA CZ - 90140
Institutional support: RVO:68378271
Keywords : warm dense matter * non-equilibrium * ITCF * X-ray Thomson scattering * relaxation * X-ray free electron laser
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 2.6, year: 2022
Method of publishing: Open access

Experiments creating extreme states of matter almost invariably create non-equilibrium states. These are very interesting in their own right but need to be understood even if the ultimate goal is to probe high-pressure or high-temperature equilibrium properties like the equation of state. Here, we report on the capabilities of the newly developed imaginary time correlation function (ITCF) technique [1] to detect and quantify non-equilibrium in pump-probe experiments fielding time resolved x-ray scattering diagnostics. We find a high sensitivity of the ITCF even to a small fraction of non-equilibrium electrons in the Wigner distribution. The behavior of the ITCF technique is such that modern lasers and detectors should be able to trace the nonequilibrium relaxation from tens of femto-seconds to several 10s of picoseconds without the need for a model.
Permanent Link: https://hdl.handle.net/11104/0352928