Laser plasma technologies for new ultracompact sources of bright synchrotron radiation

par Igor Andriyash (LOA (ENSTA Palaiseau))

mardi 2 juin 2015, 11:00 → 12:00 Europe/Paris

Salle 101 (LAL)

The capability of laser plasmas to generate and sustain ultra-high electric fields has given rise to laser-plasma engineering, which nowadays is widely used to produce and manipulate the intense beams of charged particles and radiation. One important application of laser plasmas is the compact sources of X-ray synchrotron radiation (SR) \cite{RMP1}. In this context, an important role is given to \textit{laser plasma acceleration} (LPA) -- the technique, where quasi monoenergetic beams of MeV/GeV electrons are produced in a millimeter-scale gas jet via laser-driven plasma waves \cite{RMP2,POP}. The beams delivered by state-of-the-art LPA are extremely intense, but yet have relatively high divergence and energy spread due to complexity of electron injection into the accelerating plasmas fields. Therefore, for efficient X-ray generation and/or amplification, such future laser-plasma SR sources require strong undulators, which can also operate on very short lengths. New concepts of the compact sources attract growing interest worldwide thanks to the numerous applications of X-rays in science, medicine and technology. In this presentation, I discuss the schemes of ultra-compact optical and plasma undulators, which involve laser plasma technology and nano-engineering. The concepts of the undulators based on the optical lattice \cite{PRL}, and on the nano-structured plasmas \cite{NatComm} are presented in details. Theoretical descriptions are provided and verified with advanced numerical modeling. The numerical methods are discussed explicitly in the context of X-ray amplification via stimulated scattering mechanisms \cite{jcp}. \begin{thebibliography}{99} \bibitem{RMP1} S. Corde et al, \newblock Rev. Mod. Phys. 85, 1 (2013) \bibitem{RMP2} E. Esarey et al, \newblock Rev. Mod. Phys. 81(3), 1229 (2009) \bibitem{POP} V. Malka et al, \newblock Phys. Plasmas 16, 056703 (2009) \bibitem{PRL} I.A. Andriyash et al, \newblock Phys. Rev. Lett. 109, 244802 (2012) \bibitem{NatComm} I.A. Andriyash et al, \newblock Nat. Commun. 5, 4736 (2014) \bibitem{jcp} I.A. Andriyash et al, \newblock J. Comput. Phys. 282, 397 (2015) \end{thebibliography}

Poster Sem_20150602.pdf