# EuPRAXIA@SPARC_LAB

The EuPRAXIA@SPARC_LAB project, intended to put forward LNF as host of the EuPRAXIA European Facility, will be able to accommodate any machine configuration resulting from the EuPRAXIA Design Study. In order to achieve this goal and to meet the EuPRAXIA requirements, some important preparatory actions must be taken at LNF:

• provide LNF with a new infrastructure with the size of about 135 m x 35 m, as the one required to host the EuPRAXIA facility;
• design and build the first-ever 1 GeV X-band RF linac and an upgraded FLAME laser up to the 0.5 PW range;
• design and build a compact FEL source, equipped with user beam line at 4-2 nm wavelength, driven by a high gradient plasma accelerator.

The EuPRAXIA@SPARC_LAB facility by itself will equip LNF with a unique combination of a high brightness GeV-range electron beam generated in a state-of-the-art linac, and a 0.5 PW-class laser system. Even in the case of LNF not being selected and/or of a failure of plasma acceleration technology, the infrastructure will be of top-class quality, user-oriented and at the forefront of new acceleration technologies. These unique features will enable at LNF new promising synergies between fundamental physics oriented research and high social impact applications, especially in the domain of Key Enabling Technologies (KET) and Smart Specialisation Strategies (S3), as supported by EU research funding programs. EuPRAXIA@SPARC_LAB is in fact conceived by itself as an innovative and evolutionary tool for multi-disciplinary investigations in a wide field of scientific, technological and industrial applications. It could be progressively extended to be a high brightness “particles and photons beams factory“: it will be eventually able to produce electrons, photons (from THz to $\gamma$-rays), neutrons, protons and positrons, that will be available for a wide national and international scientific community interested to take profit of advanced particle and radiation sources. More details can be found in the CDR and a brief list of parameters are reported in the next page.

Publication Highlights:

• “EuPRAXIA@SPARC_LAB Design study towards a compact FEL facility at LNF”, M. Ferrario et al., Nucl. Instrum. Meth. Phys. Res. A vol. 909 (2018) pag. 134, doi: 10.1016/j.nima.2018.01.094

• EuPRAXIA@SPARC_LAB: The high-brightness RF photo-injector layout proposal“, A. Giribono et al., Nucl. Instrum. Meth. Phys. Res. A vol. 909 (2018) pag. 282, doi: 10.1016/j.nima.2018.03.009

• EUPRAXIA@SPARC_LAB: Beam dynamics studies for the X-band Linac“, C. Vaccarezza et al., Nucl. Instrum. Meth. Phys. Res. A vol. 909 (2018) pag. 314, doi: 10.1016/j.nima.2018.01.100
• Preliminary RF design of an X-band linac for the EuPRAXIA@SPARC_LAB project“, M. Diomede et al., Nucl. Instrum. Meth. Phys. Res. A vol. 909 (2018) pag. 243, doi: 10.1016/j.nima.2018.01.032

• Conceptual design of electron beam diagnostics for high brightness plasma accelerator“, A. Cianchi et al., Nucl. Instrum. Meth. Phys. Res. A vol. 909 (2018) pag. 350, doi: 10.1016/j.nima.2018.02.095

• Plasma boosted electron beams for driving Free Electron Lasers”, A. R. Rossi et al., Nucl. Instrum. Meth. Phys. Res. A vol. 909 (2018) pag. 54, doi: 10.1016/j.nima.2018.02.092

• Free Electron Laser in the water window with plasma driven electron beams”, V. Petrillo et al., Nucl. Instrum. Meth. Phys. Res. A vol. 909 (2018) pag. 303, doi: 10.1016/j.nima.2018.02.036

• “The Potential of EuPRAXIA@SPARC_LAB for Radiation Based Techniques”, A. Balerna et al., Condens. Matter vol. 4 (2019) pag. 30, doi: 10.3390/condmat4010030
• “High transformer ratio resonant PWFA ideal working point design for EuPRAXIA@SPARC_LAB”, S. Romeo et al., J. Phys.: Conf. Ser. vol. 1596 (2020) pag. 012061, doi: 10.1088/1742-6596/1596/1/012061
• “Photon beam line of the water window FEL for the EuPRAXIA@SPARC_LAB project”, F. Villa et al., J. Phys.: Conf. Ser. vol. 1596 (2020) pag. 012039, doi: 10.1088/1742-6596/1596/1/012039
• “ARIA – A VUV beamline for EuPRAXIA@SPARC_LAB”, F. Villa et al., Condens. Matter vol. 7 (2022) pag. 11, doi: 10.3390/condmat7010011

Contact person: M. Ferrario, massimo.ferrario@lnf.infn.it, tel. (+39) 069403 2216