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. Potter; P. 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

doi:10.1088/1361-6587/ac0fcf

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 journal › Article › peer-review

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.

Original language	English
Article number	084010
Number of pages	7
Journal	Plasma Physics and Controlled Fusion
Volume	63
Issue number	8
Early online date	13 Jul 2021
DOIs	https://doi.org/10.1088/1361-6587/ac0fcf
Publication status	Published - 1 Aug 2021

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Finlay, O. J., Gruse, J. N., Thornton, C., Allott, R., Armstrong, C. D., Baird, C. D., Bourgeois, N., Brenner, C., Cipiccia, S., Cole, J. M., Gregory, C., Jamison, S., Katzir, Y., Lopes, N. C., Mangles, S. P. D., Murphy, C. D., Najmudin, Z., Neely, D., Pickard, L. R., ... Streeter, M. J. V. (2021). Characterisation of a laser plasma betatron source for high resolution x-ray imaging. Plasma Physics and Controlled Fusion, 63(8), Article 084010. https://doi.org/10.1088/1361-6587/ac0fcf

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title = "Characterisation of a laser plasma betatron source for high resolution x-ray imaging",

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. ",

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

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Finlay, OJ, Gruse, JN, Thornton, C, Allott, R, Armstrong, CD, Baird, CD, Bourgeois, N, Brenner, C, Cipiccia, S, Cole, JM, Gregory, C, Jamison, S, Katzir, Y, Lopes, NC, Mangles, SPD, Murphy, CD, Najmudin, Z, Neely, D, Pickard, LR, Potter, KD, Rajeev, PP, Rusby, D, Selwood, MP, Symes, DR, Underwood, CID, Wood, JC, Thomas, AGR & Streeter, MJV 2021, 'Characterisation of a laser plasma betatron source for high resolution x-ray imaging', Plasma Physics and Controlled Fusion, vol. 63, no. 8, 084010. https://doi.org/10.1088/1361-6587/ac0fcf

TY - JOUR

T1 - Characterisation of a laser plasma betatron source for high resolution x-ray imaging

AU - Finlay, O. J.

AU - Gruse, J. N.

AU - Thornton, C.

AU - Allott, R.

AU - Armstrong, C. D.

AU - Baird, C. D.

AU - Bourgeois, N.

AU - Brenner, C.

AU - Cipiccia, S.

AU - Cole, J. M.

AU - Gregory, C.

AU - Jamison, S.

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 - Selwood, M. P.

AU - Symes, D. R.

AU - Underwood, C. I.D.

AU - Wood, J. C.

AU - Thomas, A. G.R.

AU - Streeter, M. J.V.

PY - 2021/8/1

Y1 - 2021/8/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85111297391&partnerID=8YFLogxK

U2 - 10.1088/1361-6587/ac0fcf

DO - 10.1088/1361-6587/ac0fcf

M3 - Article

AN - SCOPUS:85111297391

SN - 0741-3335

VL - 63

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 8

M1 - 084010

ER -

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

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