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Article Dans Une Revue Plasma Physics and Controlled Fusion Année : 2016

An all-optical Compton source for single-exposure x-ray imaging

Cédric Thaury
Julien Gautier
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Igor Andriyash
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Agustin Lifschitz
Victor Malka
Antoine Rousse
Kim Ta Phuoc

Résumé

All-optical Compton sources are innovative, compact devices to produce high energy femtosecond X-rays. Here we present results on a single-pulse scheme that uses a plasma mirror to reflect the drive beam of a laser plasma accelerator and to make it collide with the highly-relativistic electrons in its wake. The accelerator is operated in the self-injection regime, producing quasi-monoenergetic electron beams of around 150 MeV peak energy. Scattering with the intense femtosecond laser pulse leads to the emission of a collimated high energy photon beam. Using continuum-attenuation filters we measure significant signal content beyond 100 keV and with simulations we estimate a peak photon energy of around 500 keV. The source divergence is about 13 mrad and the pointing stability is 7 mrad. We demonstrate that the photon yield from the source is sufficiently high to illuminate a centimeter-size sample placed 90 centimeters behind the source, thus obtaining radiographs in a single shot.

Dates et versions

hal-01263722 , version 1 (29-01-2016)

Identifiants

Citer

Andreas Döpp, Emilien Guillaume, Cédric Thaury, Julien Gautier, Igor Andriyash, et al.. An all-optical Compton source for single-exposure x-ray imaging. Plasma Physics and Controlled Fusion, 2016, 58 (3), pp.034005. ⟨10.1088/0741-3335/58/3/034005⟩. ⟨hal-01263722⟩
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