Towards Model-free Temperature Diagnostics of Warm Dense Matter from Multiple Scattering Angles

Document detail

ID

oai:arXiv.org:2411.06830

Topic

Physics - Plasma Physics Astrophysics - Instrumentation and...

Author

Bellenbaum, Hannah M. Bachmann, Benjamin Kraus, Dominik Gawne, Thomas Böhme, Maximilian P. Döppner, Tilo Fletcher, Luke B. MacDonald, Michael J. Moldabekov, Zhandos A. Preston, Thomas R. Vorberger, Jan Dornheim, Tobias

Year

2024

listing date

11/13/2024

Keywords

model-free angles

Metrics

Abstract

Warm dense matter (WDM) plays an important role in astrophysical objects and technological applications, but the rigorous diagnostics of corresponding experiments is notoriously difficult.

In this work, we present a model-free analysis of x-ray Thomson scattering (XRTS) measurements at multiple scattering angles.

Specifically, we analyze scattering data that have been collected for isochorically heated graphite at the Linac Coherent Light Source (LCLS).

Overall, we find good consistency in the extracted temperature between small and large scattering angles, whereas possible signatures of non-equilibrium may be hidden by the source function, and by the available dynamic spectral range.

The present proof-of-principle study directly points to improved experimental set-ups for equation-of-state measurements and for the model-free study of relaxation times.

Bellenbaum, Hannah M.,Bachmann, Benjamin,Kraus, Dominik,Gawne, Thomas,Böhme, Maximilian P.,Döppner, Tilo,Fletcher, Luke B.,MacDonald, Michael J.,Moldabekov, Zhandos A.,Preston, Thomas R.,Vorberger, Jan,Dornheim, Tobias, 2024, Towards Model-free Temperature Diagnostics of Warm Dense Matter from Multiple Scattering Angles