Characterisation of a laser plasma betatron source for high resolution x-ray imaging

O. J. Finlay*, J. N. Gruse, C. Thornton, R. Allott, C. D. Armstrong, C. D. Baird, N. Bourgeois, C. Brenner, S. Cipiccia, J. M. Cole, C. Gregory, S. Jamison, Y. Katzir, N. C. Lopes, S. P.D. Mangles, C. D. Murphy, Z. Najmudin, D. Neely, L. R. Pickard, K. D. PotterP. P. Rajeev, D. Rusby, M. P. Selwood, D. R. Symes, C. I.D. Underwood, J. C. Wood, A. G.R. Thomas, M. J.V. Streeter

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)
37 Downloads (Pure)


We report on the characterisation of an x-ray source, generated by a laser-driven plasma wakefield accelerator. The spectrum of the optimised source was consistent with an on-axis synchrotron spectrum with a critical energy of 13.8+2.2-1.9 keV and the number of photons per pulse generated above 1 keV was calculated to be 6+1.2-0.9× 10\9. The x-ray beam was used to image a resolution grid placed 37 cm from the source, which gave a measured spatial resolution of 4 µm 5 µm. The inferred emission region had a radius and length of 0.5 0.2 µm and 3.2 0.9 mm respectively. It was also observed that laser damage to the exit aperture of the gas cell led to a reduction in the accelerated electron beam charge and a corresponding reduction in x-ray flux due to the change in the plasma density profile.

Original languageEnglish
Article number084010
JournalPlasma Physics and Controlled Fusion
Issue number8
Early online date13 Jul 2021
Publication statusPublished - Aug 2021
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2021 The Author(s). Published by IOP Publishing Ltd.

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Condensed Matter Physics


Dive into the research topics of 'Characterisation of a laser plasma betatron source for high resolution x-ray imaging'. Together they form a unique fingerprint.

Cite this