Dynamic optical spectroscopy and pyrometry of static targets under optical and x-ray laser heating at the European XFEL

Author:

Ball O. B.1ORCID,Prescher C.23ORCID,Appel K.4ORCID,Baehtz C.5ORCID,Baron M. A.67ORCID,Briggs R.8ORCID,Cerantola V.4ORCID,Chantel J.7ORCID,Chariton S.9ORCID,Coleman A. L.8ORCID,Cynn H.8ORCID,Damker H.2,Dattelbaum D.10ORCID,Dresselhaus-Marais L. E.18ORCID,Eggert J. H.8ORCID,Ehm L.11ORCID,Evans W. J.8ORCID,Fiquet G.6ORCID,Frost M.12ORCID,Glazyrin K.2ORCID,Goncharov A. F.13ORCID,Husband R. J.2ORCID,Hwang H.1ORCID,Jaisle N.14ORCID,Jenei Zs.8ORCID,Kim J.-Y.15ORCID,Lee Y.16ORCID,Liermann H. P.2ORCID,Mainberger J.2,Makita M.4ORCID,Marquardt H.17ORCID,McBride E. E.12ORCID,McHardy J. D.1ORCID,McMahon M. I.1ORCID,Merkel S.7ORCID,Morard G.16ORCID,O’Bannon E. F.8ORCID,Otzen C.2ORCID,Pace E. J.1ORCID,Pelka A.5,Pépin C. M.18ORCID,Pigott J. S.1210ORCID,Plückthun C.24ORCID,Prakapenka V. B.9ORCID,Redmer R.19ORCID,Speziale S.20ORCID,Spiekermann G.21ORCID,Strohm C.2ORCID,Sturtevant B. T.10ORCID,Talkovski P.2,Wollenweber L.4ORCID,Zastrau U.4ORCID,McWilliams R. S.1ORCID,Konôpková Z.4ORCID

Affiliation:

1. The School of Physics and Astronomy, Centre for Science at Extreme Conditions, and SUPA, University of Edinburgh 1 , Peter Guthrie Tait Road, Edinburgh EH9 3FD, United Kingdom

2. Deutsches Elektronen-Synchrotron DESY 2 , Notkestr. 85, 22607 Hamburg, Germany

3. 3 Institute of Earth and Environmental Sciences - Geomaterials and Crystalline Materials, Albert-Ludwigs Universität Freiburg, Hermann-Herder Str. 5, 79104 Freiburg, Germany

4. European XFEL GmbH 4 , Holzkoppel 4, 22869 Schenefeld, Germany

5. Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf 5 , Bautzner Landstraße 400, 01328 Dresden, Germany

6. Inst. Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, UMR CNRS 7590, Museum National d’Histoire Naturelle 6 , 4 Place Jussieu, Paris, France

7. Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207 - UMET - Unité Matériaux et Transformations 7 , F-59000 Lille, France

8. Lawrence Livermore National Laboratory 8 , 7000 East Avenue, Livermore, California 94550, USA

9. Center for Advanced Radiation Sources, University of Chicago 9 , Chicago, Illinois 60637, USA

10. Los Alamos National Laboratory 10 , Los Alamos, New Mexico 87545, USA

11. Mineral Physics Institute, Stony Brook University 13 , Stony Brook, New York 11794, USA

12. SLAC National Accelerator Laboratory 12 , 2575 Sand Hill Road, Menlo Park, California 94025, USA

13. Carnegie Science, Earth and Planets Laboratory 14 , 5241 Broad Branch Road, NW, Washington, DC 20015, USA

14. Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre 17 , 38000 Grenoble, France

15. Department of Physics, Research Institute for High Pressure, Hanyang University 18 , 222 Wangsimni-ro, Seoul 04763, Republic of Korea

16. Earth System Sciences, Yonsei University 15 , 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea

17. Department of Earth Sciences, University of Oxford 19 , South Parks Road, OX1 3AN Oxford, United Kingdom

18. CEA, DAM, DIF, F-91297 Arpajon, France and Université Paris-Saclay, CEA, Laboratoire Matière en Conditions Extrêmes 22 , 91680 Bruyères-le-Châtel, France

19. Institut für Physik, Universität Rostock 24 , D-18051 Rostock, Germany

20. GFZ German Research Centre for Geosciences, Telegrafenberg 25 , 14473 Potsdam, Germany

21. ETH Zürich 26 , Rämistrasse 101, 8092 Zürich, Switzerland

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-heated states at the High Energy Density instrument of the European XFEL. This collection of typical experiments, coupled with numerical models, outlines the reliability, precision, and meaning of time dependent temperature measurements using optical emission at XFEL sources. 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 30 pulses, and 250-ns infrared laser single pulses. A range of further possibilities for optical measurements of visible light in x-ray laser experiments using streak optical spectroscopy are also explored, including for the study of x-ray induced optical fluorescence, which often appears as background in thermal radiation measurements. We establish several scenarios where combined emissions from multiple sources are observed and discuss their interpretation. Challenges posed by using x-ray lasers as non-invasive probes of the sample state are addressed.

Funder

EPSRC

Horizon 2020 Framework Programme

DOE Office of Fusion Energy Science

National Science Foundation

EuXFEL Community Proposal

Publisher

AIP Publishing

Subject

General Physics and Astronomy

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