Ricerc@Sapienza

The development of compact accelerator facilities providing high-brightness beams is one of the most challenging tasks in the field of next-generation compact and cost affordable particle accelerators, to be used in many fields for industrial, medical, and research applications. The ability to shape the beam longitudinal phase space, in particular, plays a key role in achieving high-peak brightness. Here we present a new approach that allows us to tune the longitudinal phase space of a high-brightness beam by means of plasma wakefields.

This work aims at offering an overview on the scientific results stemming from a selection of three Short-Term Scientific Missions (STSMs) carried out in 2016 and funded by the COST Action TU1208 'Civil Engineering Applications of Ground Penetrating Radar.' The research activities focused on the development and use of electromagnetic modelling and inversion techniques for Ground Penetrating Radar applications.

In this paper, a systematic design of Fabry-Perot cavity antennas based on leaky waves is proposed in the THz range. The use of different topologies for the synthesis of homogenized metasurfaces shows that a specific fishnetlike unit cell is particularly suitable for the design of efficient THz radiating devices. Accurate full-wave simulations highlight the advantages and disadvantages of the proposed geometries, thoroughly considering the bounds dictated by technological constraints and the homogenization limit as well.