Finlay, OJ;
Gruse, JN;
Thornton, C;
Allott, R;
Armstrong, CD;
Baird, CD;
Bourgeois, N;
... Streeter, MJ; + view all
(2021)
Characterisation of a laser plasma betatron source for high resolution x-ray imaging.
Plasma Physics and Controlled Fusion
, 63
(8)
, Article 084010. 10.1088/1361-6587/ac0fcf.
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Abstract
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.
| Type: | Article |
|---|---|
| Title: | Characterisation of a laser plasma betatron source for high resolution x-ray imaging |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/1361-6587/ac0fcf |
| Publisher version: | https://doi.org/10.1088/1361-6587/ac0fcf |
| Language: | English |
| Additional information: | Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10146423 |
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