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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Characterisation of a Laser Plasma Betatron Source for High Resolution X-ray Imaging
AU - Finlay, Oliver
AU - Gruse, J-N
AU - Thornton, C
AU - Allott, R
AU - Armstrong, C
AU - Baird, C.D.
AU - Bourgeois, N
AU - Brenner, C
AU - Cipiccia, S
AU - Cole, J.M.
AU - Gregory, C.
AU - Jamison, Steven
AU - Katzir, Y.
AU - Lopes, N.C.
AU - Mangles, S.P.D.
AU - Murphy, C.D.
AU - Najmudin, Z.
AU - Neely, D.
AU - Pickard, L.R.
AU - Potter, K.D.
AU - Rajeev, P.P.
AU - Rusby, D.
AU - Symes, D.R.
AU - Underwood, C.I.D.
AU - Thomas, Alec
AU - Streeter, Matthew
PY - 2021/8/31
Y1 - 2021/8/31
N2 - We report on the characterisation of an x-ray source, generated by a laser-driven plasma wakefield accelerator. The spectra 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 × 109. 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.
AB - We report on the characterisation of an x-ray source, generated by a laser-driven plasma wakefield accelerator. The spectra 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 × 109. 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.
U2 - 10.1088/1361-6587/ac0fcf
DO - 10.1088/1361-6587/ac0fcf
M3 - Journal article
VL - 63
JO - Plasma Physics and Controlled Fusion
JF - Plasma Physics and Controlled Fusion
SN - 0741-3335
IS - 8
M1 - 084010
ER -