Single-Shot Multi-keV X-Ray Absorption Spectroscopy Using an Ultrashort Laser-Wakefield Accelerator Source
Abstract
We report that single-shot absorption measurements have been performed using the multi-keV x rays generated by a laser-wakefield accelerator. A 200 TW laser was used to drive a laser-wakefield accelerator in a mode which produced broadband electron beams with a maximum energy above 1 GeVand a broad divergence of ≈15 mrad FWHM. Betatron oscillations of these electrons generated 1.2 ± 0.2 x 106 photons/eV in the 5 keV region, with a signal-to-noise ratio of approximately 300:1. This was sufficient to allow high-resolution x-ray absorption near-edge structure measurements at the K edge of a titanium sample in a single shot. We demonstrate that this source is capable of single-shot, simultaneous measurements of both the electron and ion distributions in matter heated to eV temperatures by comparison with density functional theory simulations. The unique combination of a high-flux, large bandwidth, few femtosecond duration x-ray pulse synchronized to a high-power laser will enable key advances in the study of ultrafast energetic processes such as electron-ion equilibration.
- Authors:
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- Imperial College, London (United Kingdom)
- Lancaster Univ., (United Kingdom)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Science and Technology Facilities Council (STFC), Didcot (United Kingdom)
- Helmholtz-Zentrum Dresden-Rossendorf, Dresden (Germany); Institute of Physics of the ASCR, Prague (Czech Republic)
- Lund Univ. (Sweden)
- Univ. of Michigan, Ann Arbor, MI (United States)
- Instituto Superior Tecnico, Lisbon (Portugal)
- Helmholtz-Zentrum Dresden-Rossendorf, Dresden (Germany)
- Lancaster Univ., (United Kingdom); Univ. of Michigan, Ann Arbor, MI (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES); European Research Council9ERC)
- OSTI Identifier:
- 1843564
- Report Number(s):
- LLNL-JRNL-820665
Journal ID: ISSN 0031-9007; 1031707; TRN: US2302288
- Grant/Contract Number:
- AC52-07NA27344; 682399; SC0019186
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 123; Journal Issue: 25; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; high-energy density plasmas; astrophysical plasmas; laser wakefield acceleration; strongly-coupled plasmas; warm dense matter; x-ray absorption; spectroscopy
Citation Formats
Kettle, B., Gerstmayr, E., Streeter, M. J. V., Albert, F., Baggott, R. A., Bourgeois, N., Cole, J. M., Dann, S., Falk, K., Gallardo González, I., Hussein, A. E., Lemos, N., Lopes, N. C., Lundh, O., Ma, Y., Rose, S. J., Spindloe, C., Symes, D. R., Smid, M., Thomas, A. G. R., Watt, R., and Mangles, S. P. D. Single-Shot Multi-keV X-Ray Absorption Spectroscopy Using an Ultrashort Laser-Wakefield Accelerator Source. United States: N. p., 2019.
Web. doi:10.1103/physrevlett.123.254801.
Kettle, B., Gerstmayr, E., Streeter, M. J. V., Albert, F., Baggott, R. A., Bourgeois, N., Cole, J. M., Dann, S., Falk, K., Gallardo González, I., Hussein, A. E., Lemos, N., Lopes, N. C., Lundh, O., Ma, Y., Rose, S. J., Spindloe, C., Symes, D. R., Smid, M., Thomas, A. G. R., Watt, R., & Mangles, S. P. D. Single-Shot Multi-keV X-Ray Absorption Spectroscopy Using an Ultrashort Laser-Wakefield Accelerator Source. United States. https://doi.org/10.1103/physrevlett.123.254801
Kettle, B., Gerstmayr, E., Streeter, M. J. V., Albert, F., Baggott, R. A., Bourgeois, N., Cole, J. M., Dann, S., Falk, K., Gallardo González, I., Hussein, A. E., Lemos, N., Lopes, N. C., Lundh, O., Ma, Y., Rose, S. J., Spindloe, C., Symes, D. R., Smid, M., Thomas, A. G. R., Watt, R., and Mangles, S. P. D. Tue .
"Single-Shot Multi-keV X-Ray Absorption Spectroscopy Using an Ultrashort Laser-Wakefield Accelerator Source". United States. https://doi.org/10.1103/physrevlett.123.254801. https://www.osti.gov/servlets/purl/1843564.
@article{osti_1843564,
title = {Single-Shot Multi-keV X-Ray Absorption Spectroscopy Using an Ultrashort Laser-Wakefield Accelerator Source},
author = {Kettle, B. and Gerstmayr, E. and Streeter, M. J. V. and Albert, F. and Baggott, R. A. and Bourgeois, N. and Cole, J. M. and Dann, S. and Falk, K. and Gallardo González, I. and Hussein, A. E. and Lemos, N. and Lopes, N. C. and Lundh, O. and Ma, Y. and Rose, S. J. and Spindloe, C. and Symes, D. R. and Smid, M. and Thomas, A. G. R. and Watt, R. and Mangles, S. P. D.},
abstractNote = {We report that single-shot absorption measurements have been performed using the multi-keV x rays generated by a laser-wakefield accelerator. A 200 TW laser was used to drive a laser-wakefield accelerator in a mode which produced broadband electron beams with a maximum energy above 1 GeVand a broad divergence of ≈15 mrad FWHM. Betatron oscillations of these electrons generated 1.2 ± 0.2 x 106 photons/eV in the 5 keV region, with a signal-to-noise ratio of approximately 300:1. This was sufficient to allow high-resolution x-ray absorption near-edge structure measurements at the K edge of a titanium sample in a single shot. We demonstrate that this source is capable of single-shot, simultaneous measurements of both the electron and ion distributions in matter heated to eV temperatures by comparison with density functional theory simulations. The unique combination of a high-flux, large bandwidth, few femtosecond duration x-ray pulse synchronized to a high-power laser will enable key advances in the study of ultrafast energetic processes such as electron-ion equilibration.},
doi = {10.1103/physrevlett.123.254801},
journal = {Physical Review Letters},
number = 25,
volume = 123,
place = {United States},
year = {Tue Dec 17 00:00:00 EST 2019},
month = {Tue Dec 17 00:00:00 EST 2019}
}
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