Journal Article

PUBDB-2024-06938

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Measurement bias in self-heating x-ray free electron laser experiments from diffraction studies of phase transformation in titanium

Ball, O. B. ; Husband, R. J.XFEL.EU*DESY* ; McHardy, J. D. ; McMahon, M. I. ; Strohm, C.XFEL.EU*DESY* ; Konôpková, Z. ; Appel, K. ; Cerantola, V. ; Coleman, A. L. ; Cynn, H. ; Dwivedi, A. ; Goncharov, A. F. ; Graafsma, H.CFEL*XFEL.EU*DESY* ; Huston, L. Q. ; Hwang, H.Extern*XFEL.EU* ; Kaa, J. ; Kim, J.-Y. ; Koemets, E. ; Laurus, T.CFEL*XFEL.EU*DESY* ; Li, X. ; Marquardt, H. ; Méndez, A. S. J.Extern* ; Merkel, S. ; Mondal, A. ; Morard, G. ; Prakapenka, V. B. ; Prescher, C. ; Preston, T. R. ; Speziale, S. ; Stern, S. ; Sturtevant, B. T. ; Sztuk-Dambietz, J. ; Velisavljevic, N. ; Yoo, C.-S. ; Zastrau, U. ; Jenei, Z. ; Liermann, H. P.XFEL.EU*DESY* ; Mcwilliams, R. S. (Corresponding author)Extern*

2024
American Inst. of Physics Melville, NY

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Please use a persistent id in citations: doi:10.1063/5.0215908  doi:10.3204/PUBDB-2024-06938

Abstract: X-ray self-heating is a common by-product of X-ray Free Electron Laser (XFEL) techniques that can affect targets, optics, and other irradiated materials. Diagnosis of heating and induced changes in samples may be performed using the x-ray beam itself as a probe. However, therelationship between conditions created by and inferred from x-ray irradiation is unclear and may be highly dependent on the materialsystem under consideration. Here, we report on a simple case study of a titanium foil irradiated, heated, and probed by a MHz XFEL pulsetrain at 18.1 keV delivered by the European XFEL using measured x-ray diffraction to determine temperature and finite element analysis tointerpret the experimental data. We find a complex relationship between apparent temperatures and sample temperature distributions thatmust be accounted for to adequately interpret the data, including beam averaging effects, multivalued temperatures due to sample phasetransitions, and jumps and gaps in the observable temperature near phase transformations. The results have implications for studies employing x-ray probing of systems with large temperature gradients, particularly where these gradients are produced by the beam itself. Finally,this study shows the potential complexity of studying nonlinear sample behavior, such as phase transformations, where biasing effects oftemperature gradients can become paramount, precluding clear observation of true transformation conditions.

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Contributing Institute(s):

1. The European XFEL Users (XFEL-User)
2. HED (XFEL_E1_HED)
3. FS-PS Fachgruppe HIBEF (FS-HIBEF)
4. FS-Detektor Systeme (FS-DS)
5. PETRA-D (FS-PETRA-D)

Research Program(s):

1. 631 - Matter – Dynamics, Mechanisms and Control (POF4-631) (POF4-631)
2. DFG project G:(GEPRIS)170172421 - Matter under extreme conditions as relevant for planetary interior and dynamo models (170172421) (170172421)

Experiment(s):

1. XFEL Beamline SASE 2 (XFEL)

Appears in the scientific report 2024

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; National-Konsortium ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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