EUPRAXIA@SPARC_LAB: Beam dynamics studies for the X-band Linac

Abstract

In the framework of the Eupraxia Design Study an advanced accelerator facility EUPRAXIA@SPARC LAB has been proposed to be realized at Frascati (Italy) Laboratories of INFN. Two advanced acceleration schemes will be applied, namely an ultimate high gradient 1 GeV X-band linac together with a plasma acceleration stage to provide accelerating gradients of the GeV/m order. A FEL scheme is foreseen to produce X-ray beams within 3-10 nm range. A 500-TW Laser system is also foreseen for electron and ion production experiments and a Compton backscattering Interaction is planned together with extraction beamlines at intermediate electron beam energy for neutron beams and THz radiation production. The electron beam dynamics studies in the linac are here presented together with the preliminary machine layout.

Plasma lens-based beam extraction and removal system for plasma wakefield acceleration experiments

“…For the beam-driven scenario, the LNF-INFN laboratories located in Frascati have been recently selected as possible hosting site [23,24]. To generate FEL radiation, such a facility will make use of the X-band linac to produce and pre-accelerate a driver-witness beam up to 500 MeV and then inject it into a PWFA-based booster (operating with plasma densities of the order of n p ≈ 10 16 cm −3 ) to increase the final energy up to 1 GeV [25,26]. Figure 1 shows the simulated longitudinal phase-space (LPS) of a 200 pC driver followed by a 30 pC witness downstream the PWFA module.…”

Preliminary RF design of an X-band linac for the EuPRAXIA@SPARC_LAB project

“…According to beam dynamics calculations and single bunch beam break up limits, an average iris radius a =3.2 mm has been taken into account (the corresponding parameters are given in Tab. 2) [9].…”

EuPRAXIA@SPARC_LAB Design study towards a compact FEL facility at LNF

“…From left to right one can see a 55 m long tunnel hosting a high brightness 150 MeV S-band RF photoinjector equipped with a hybrid compressor scheme based on both velocity bunching [6,7,8] and magnetic chicane. The energy boost from 150 MeV up to a maximum 1 GeV will be provided by a chain of high gradient X-band RF cavities [9,10]. At the linac exit a 5 m long plasma accelerator section will be installed, which includes the plasma module (∼0.5 m long) [11] and the required matching [12,13] and diagnostics sections [14,15].…”

“…We have investigated the possibility to fulfill the 1 GeV EuPRAXIA parameters [3]. To support our design in both plasma acceleration options (PWFA and LWFA) we have performed Start To End Simulations with promising results, as discussed in [8,10,16,20,21]. In Table 1 the achieved parameters are reported.…”