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). In this context, an important role is given to 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. 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 effcient 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,  and on the nano-structured plasmas are presented in detail.  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.

Seminarraum HI-Jena, Fröbelstieg 3
Datum (Start der Veranstaltung)