Sep 13 – 19, 2015
La Biodola, Isola d'Elba
Europe/Rome timezone

hybrid-code and PIC-code simulations for PWFA at SPARC_LAB

Sep 16, 2015, 4:00 PM
20m
SB2 Sala Bonaparte 2 (Hotel Hermitage)

SB2 Sala Bonaparte 2

Hotel Hermitage

talk WG6 - Theory and simulations WG6 - Theory and simulations

Speaker

Alberto Marocchino (ROMA1)

Description

We present a possible working point for the Sparc_Lab LNF facility that preserve bunch quality: witness is positioned and shaped so to preserve, over the entire acceleration length, both emittance and energy spread. This configuration is characterised by a 200pC driver and a 20pC follower witness. The one driver plus one witness is extended to a COMB (train of bunches) configuration: 3 drivers plus a witness. Bunch characteristics are taken from recent Sparc_Lab experimental results. To obtain the effective working point we used, and we currently use, a combination of two codes: Architect, an hybrid fast-running code, and ALaDyn a full PIC-code. Both tools are necessary to fully understand the underlying physics and to quickly asses feasible working points. Architect is an hybrid code: bunches are treated kinetically while the background plasma is model as a cold fluid. The following approach allow to greatly reduce run time, a few hours, without loss of generality. We wish to point out that Architect is designed not to give qualitative solutions; Architect well predicts solutions up to the weakly-non-linear regimes, well reproducing the bubble-wake profile.

Primary authors

Alberto Marocchino (ROMA1) Mr Francesco Massimo (Department SBAI, Sapienza Università di Roma)

Co-authors

Andrea Mostacci (ROMA1) Andrea Renato Rossi (MI) Enrica Chiadroni (LNF) Luigi Palumbo (ROMA1) Massimo Ferrario (LNF)

Presentation materials