Journal Article

PUBDB-2025-00082

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Calculation of effective pump fluence in X-ray pump - X-ray probeexperiments

Antunes, S. (Corresponding author)CFEL*DESY* ; Stransky, M. ; Tkachenko, V.Extern*XFEL.EU*DESY* ; Inoue, I.Extern*XFEL.EU* ; Heimann, P. ; Kapcia, K. J.CFEL*Extern* ; Ziaja, B. (Corresponding author)CFEL*XFEL.EU*DESY*

2025
IUCr Chester

This record in other databases:    

Please use a persistent id in citations: doi:10.1107/S1600577525006939  doi:10.3204/PUBDB-2025-00082

Abstract: n pump–probe experiments on solid materials performed within ultrafast X-ray science, the energy deposited by an X-ray pump pulse in the sample has a non-uniform spatial distribution. The following X-ray probe pulse then measures a volume-integrated average of contributions from the differently irradiated regions of the sample. Here we propose a scheme to calculate an effective fluence of the pump pulse such that the observable of interest calculated with the effective fluence is very close to the volume-integrated observable. This approach simplifies computational simulations of X-ray irradiated solids, which typically use periodic boundary conditions and assume a uniformly irradiated simulation box. Obtaining a prediction on a volume-integrated observable requires a significant computational effort, as it is necessary to run multiple simulations for the different exposure conditions and then perform their volume integration. The proposed scheme reduces this effort to a single calculation with the effective fluence.

---

Contributing Institute(s):

1. Gruppe CFEL-XM (FS-CFEL-XM)

Research Program(s):

1. 631 - Matter – Dynamics, Mechanisms and Control (POF4-631) (POF4-631)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2025

---

Database coverage:
; ; ; ; Article Processing Charges ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; DOAJ Seal ; Ebsco Academic Search ; Essential Science Indicators ; Fees ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---