1. SPARC_LAB present and future;Ferrario;Nucl. Instrum. Methods Phys. Res. B,2013
2. M. Ferrario, et al., EuPRAXIA@SPARC_LAB: design study towards a compact FEL facility at LNF, these proceedings, 2017.
3. P.A. Walker, et al., HORIZON 2020 EuPRAXIA design study, in: Proc. of IPAC2017, TUOBB3, Copenhagen, Denmark, 2017.
4. Z. Farkas, H. Hogg, G. Loew, P.B Wilson, SLED: A method of doubling SLAC’s energy, in: Proc. of 9th Int. Conf. on High Energy Accelerators, SLAC, 1974, p. 576.
5. CPI website, http://www.cpii.com/.