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Hard X Rays from Laser-Wakefield Accelerators in Density Tailored Plasmas

Abstract : Betatron x-ray sources from laser-plasma accelerators reproduce the principle of a synchrotron at the millimeter scale. They combine compactness, femtosecond pulse duration, broadband spectrum, and micron source size. However, when produced with terawatt class femtosecond lasers, their energy and flux are not sufficient to compete with synchrotron sources, thus limiting their dissemination and its possible applications. Here we present a simple method to enhance the energy and the flux of betatron sources without increasing the laser energy. The orbits of the relativistic electrons emitting the radiation were controlled using density tailored plasmas so that the energetic efficiency of the betatron source is increased by more than one order of magnitude.
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Submitted on : Thursday, December 10, 2020 - 1:14:32 PM
Last modification on : Wednesday, May 11, 2022 - 3:22:05 PM
Long-term archiving on: : Thursday, March 11, 2021 - 7:31:33 PM

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Michaela Kozlova, Igor Andriyash, Julien Gautier, Stéphane Sebban, Slava Smartsev, et al.. Hard X Rays from Laser-Wakefield Accelerators in Density Tailored Plasmas. Physical Review X, American Physical Society, 2020, 10, pp.011061. ⟨10.1103/physrevx.10.011061⟩. ⟨hal-03051882⟩

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