Journal Article

PUBDB-2023-05389

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Dynamic optical spectroscopy and pyrometry of static targets under optical and x-ray laser heating at the European XFEL

Ball, O. (Corresponding author)Extern*XFEL.EU* ; Prescher, C.Extern* ; Appel, K.XFEL.EU* ; Baehtz, C.Extern*XFEL.EU* ; Baron, M. A. ; Briggs, R. ; Cerantola, V. ; Chantel, J. ; Chariton, S. ; Coleman, A. L. ; Cynn, H. ; Damker, H. ; Dattelbaum, D. ; Dresselhaus-Marais, L. E. ; Eggert, J. H. ; Ehm, L. ; Evans, W. J. ; Fiquet, G. ; Frost, M. ; Glazyrin, K. ; Goncharov, A. F. ; Husband, R. J. ; Hwang, H. ; Jaisle, N. ; Jenei, Z. ; Kim, J.-Y. ; Lee, Y. ; Liermann, H. P.XFEL.EU*DESY* ; Mainberger, J.Extern* ; Makita, M. ; Marquardt, H. ; McBride, E. E.Extern* ; McHardy, J. D. ; McMahon, M. I. ; Merkel, S. ; Morard, G. ; O’Bannon, E. F. ; Otzen, C. ; Pace, E. J.Extern* ; Pelka, A.Extern*XFEL.EU* ; Pépin, C. M. ; Pigott, J. S. ; Plückthun, C. ; Prakapenka, V. B. ; Redmer, R. ; Speziale, S. ; Spiekermann, G. ; Strohm, C.XFEL.EU*DESY* ; Sturtevant, B. T. ; Talkovski, P. ; Wollenweber, L.XFEL.EU* ; Zastrau, U. ; Mcwilliams, R. S. (Corresponding author)Extern* ; Konôpková, Z.

2023
American Inst. of Physics Melville, NY

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Please use a persistent id in citations: doi:10.1063/5.0142196  doi:10.3204/PUBDB-2023-05389

Abstract: Experiments accessing extreme conditions at x-ray free electron lasers (XFELs) involve rapidly evolving conditions of temperature. Here,we report time-resolved, direct measurements of temperature using spectral streaked optical pyrometry of x-ray and optical laser-heatedstates at the High Energy Density instrument of the European XFEL. This collection of typical experiments, coupled with numericalmodels, outlines the reliability, precision, and meaning of time dependent temperature measurements using optical emission at XFELsources. Dynamic temperatures above 1500 K are measured continuously from spectrally- and temporally-resolved thermal emission at 450–850 nm, with time resolution down to 10–100 ns for 1–200 μs streak camera windows, using single shot and integrated modes.Targets include zero-pressure foils free-standing in air and in vacuo, and high-pressure samples compressed in diamond anvil cell multi-layer targets. Radiation sources used are 20-fs hard x-ray laser pulses at 17.8 keV, in single pulses or 2.26 MHz pulse trains of up to 30pulses, and 250-ns infrared laser single pulses. A range of further possibilities for optical measurements of visible light in x-ray laserexperiments using streak optical spectroscopy are also explored, including for the study of x-ray induced optical fluorescence, whichoften appears as background in thermal radiation measurements. We establish several scenarios where combined emissions from multiplesources are observed and discuss their interpretation. Challenges posed by using x-ray lasers as non-invasive probes of the sample stateare addressed.

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Contributing Institute(s):

1. The European XFEL Users (XFEL-User)
2. PETRA-D (FS-PETRA-D)
3. DOOR-User (DOOR ; HAS-User)
4. HED (XFEL_E1_HED)

Research Program(s):

1. 631 - Matter – Dynamics, Mechanisms and Control (POF4-631) (POF4-631)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)

Experiment(s):

1. HED: High-Density matter Experiments (SASE2)
2. PETRA Beamline P02.2 (PETRA III)

Appears in the scientific report 2023

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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 ; PubMed Central ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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