SPARC_LAB & EuPRAXIA

The connection and synergy between the SPARC_LAB facility at INFN-LNF Frascati and the EuPRAXIA project (European Plasma Research Accelerator with Excellence in Applications), now applying for the Preparatory Phase Project (EuPRAXIA-PPP) as a new distributed ESFRI Research Infrastructure for Europe, lies in the EuPRAXIA@SPARC_Lab project aiming to construct at Frascati site an electron-driven plasma accelerator ready for operation in 2028. In the EuPraxia@SPARC_LAB project a high brightness photoinjector coupled with a high gradient X-band linac is meant to provide a Witness-Driver electron beam configuration at 500 MeV able to drive a plasma acceleration stage up to 1 GeV preserving the beam quality necessary to pilot a FEL radiation source at . In the meanwhile the Technical Design Report is being written the SPARC_LAB facility plays its fundamental role as experimental site for all the key aspects of the EuPRAXIA@SPARC_LAB project, i.e. beam dynamics studies, tolerances estimation/validation and technological required improvements. Here the EuPRAXIA@SPARC_LAB project will be described together with SPARC_LAB main results preparatory to the accomplishment of the project.