Laser wakefield acceleration: application to Betatron X- ray radiation production and X-ray imaging

S. Fourmaux 1 Sébastien Corde 2 Kim Ta Phuoc 2 P. Lassonde 1 S. Payeur 1 S. Gnedyuk 1 F. Martin, 1 Victor Malka 2 Antoine Rousse 2 J. C. Kieffer 1
1 EMT-INRS - Énergie Matériaux Télécommunications - INRS
2 LOA - Laboratoire d'optique appliquée
Abstract : High intensity femtosecond laser pulses can be used to generate X-ray radiation. In the laser wakefield process, when a high intensity laser pulse (>10(18) W/cm(2)) is focused onto a gas jet target, it interacts with the instantaneously created under-dense plasma and excites a wakefield wave. In the wakefield electrons are trapped and accelerated to high energies in short distances. The electrons trapped in the wakefield can perform Betatron oscillations across the propagation axis and emit X-ray photons. The Betatron X-ray beam is broadband as the radiation emission has a synchrotron distribution. The X-ray beam is collimated and its pulse duration is femtosecond. For high resolution and phase contrast X-ray imaging applications, the important feature of the X-ray Betatron beam is the mu m source size. Using ALLS 100 TW class laser system we demonstrate that the Betatron X-ray beam is both energetic and bright enough to produce single laser shot phase contrast imaging of complex objects located in air.
Keywords : Ultrafast laser system High intensity laser pulse Laser wakefield acceleration Laser based X-ray source Betatron X-ray radiation Phase contrast X-ray imaging
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Conference papers
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https://hal-ensta-paris.archives-ouvertes.fr//hal-01401690
Contributor : Pierre Zaparucha <>
Submitted on : Wednesday, November 23, 2016 - 4:33:19 PM
Last modification on : Wednesday, July 3, 2019 - 10:48:03 AM

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ENSTA | X | X-LOA | ENSTA_LOA | PARISTECH | X-DEP-PHYS

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S. Fourmaux, Sébastien Corde, Kim Ta Phuoc, P. Lassonde, S. Payeur, et al.. Laser wakefield acceleration: application to Betatron X- ray radiation production and X-ray imaging . Conference on Photonics North, Jun 2012, Montreal, Canada. ⟨10.1117/12.2001554⟩. ⟨hal-01401690⟩

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