Advanced

Single-Shot Multi-keV X-Ray Absorption Spectroscopy Using an Ultrashort Laser-Wakefield Accelerator Source

Kettle, B. ; Gerstmayr, E. ; Streeter, M. J.V. ; Albert, F. ; Baggott, R. A. ; Bourgeois, N. ; Cole, J. M. ; Dann, S. ; Falk, K. and Gallardo González, I. LU , et al. (2019) In Physical Review Letters 123(25).
Abstract

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 GeV and a broad divergence of ≈15 mrad FWHM. Betatron oscillations of these electrons generated 1.2±0.2×106 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... (More)

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 GeV and a broad divergence of ≈15 mrad FWHM. Betatron oscillations of these electrons generated 1.2±0.2×106 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.

(Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; ; ; ; and , et al. (More)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; and (Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
123
issue
25
article number
254801
publisher
American Physical Society
external identifiers
  • pmid:31922780
  • scopus:85077270863
ISSN
0031-9007
DOI
10.1103/PhysRevLett.123.254801
language
English
LU publication?
yes
id
74f7862d-9d72-4f2e-8103-8c293496233d
date added to LUP
2020-01-10 13:04:26
date last changed
2020-10-20 02:06:55
@article{74f7862d-9d72-4f2e-8103-8c293496233d,
  abstract     = {<p>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 GeV and a broad divergence of ≈15 mrad FWHM. Betatron oscillations of these electrons generated 1.2±0.2×106 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.</p>},
  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 Šmíd, M. and Thomas, A. G.R. and Watt, R. and Mangles, S. P.D.},
  issn         = {0031-9007},
  language     = {eng},
  number       = {25},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Single-Shot Multi-keV X-Ray Absorption Spectroscopy Using an Ultrashort Laser-Wakefield Accelerator Source},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.123.254801},
  doi          = {10.1103/PhysRevLett.123.254801},
  volume       = {123},
  year         = {2019},
}