Achieving superradiant plasma accelerator-based light sources with collective effects | Jorge Vieira скачать в хорошем качестве

Achieving superradiant plasma accelerator-based light sources with collective effects | Jorge Vieira

Speaker: Prof Jorge Vieira, Computational and theoretical plasma physicist (GoLP/IPFN) and associate professor at Instituto Superior Técnico. Watch the interview with Prof Jorge Vieira here    • Interview with Prof Jorge Vieira | Simulat...   Abstract Coherent light sources, such as free electron lasers, provide bright beams for biology, chemistry, physics, and advanced technological applications. As their brightness increases, these sources are also becoming progressively larger, with the longest being several km long (e.g. LCLS). Plasma accelerators are much more compact and can play a key role in bringing these sources to smaller laboratories. Reaching this goal requires orders of magnitude increase in the brightness delivered by plasma accelerator-based light sources. A radical enhancement of beam brightness in plasma accelerator light sources depends directly on the onset of temporal coherence and superradiance. Here, we investigate a new radiation emission mechanism that may bring temporal coherence and superradiance to plasma accelerator-based light sources [1]. The concept makes use of the radiation produced by an ensemble of light-emitting particles exhibiting collective, matter-wave effects. Such collective motions, which can be as simple as a plasma wave, are pervasive in plasma physics and, notably, in plasma-based accelerators. We find that the trajectory of the centroid of such collective perturbation (which we denote as a quasi-particle) determines key radiation aspects, such as temporal coherence, just as if it were a single particle undergoing a similar trajectory. We apply this concept to obtain superradiant emission using relativistic electron bunches, and in plasma accelerator-based light sources, to generate broadband and narrow bandwidth superradiant and temporally coherent radiation in the XUV/soft-xray region. We use theory and particle-in-cell simulations complemented by the Radiation Diagnostic for Osiris (RaDiO) [2], and discuss a recent experimental verification [3]. [1] B. Malaca et al, Nature Photonics 18, pages 39–45 (2024) [2] M. Pardal et al, Comp. Phys. Communs. 285, 108634 (2023) [3] S. Fu et al., Phys. Rev. Lett. 134, 045001 (2025). This talk is part of the EuPRAXIA Seminar Series, more information can be found here https://agenda.infn.it/e/eupraxia-vir... #plasmaaccelerators #wakefield #linacs #lightsource