Considerable interest has been shown in the last few years in compact plasma accelerators characterized by extremely high accelerating gradients generated, e.g., by high brightness particle beams. PWFA is currently under investigation at SPARC Lab test facility (Frascati, Italy). Despite 1D model are too simple and limited to catch the whole underlying physics, they offer a simple and fast tool to assess possible working points. We discuss how these models can be analytically modified to extend their validity in the quasi-non-linear regime to phenomenologically account for damping effects. We also present 3D PIC simulations for emittance pressure dominated regimes. We discuss how elongated bunch, with a transverse dimension smaller than the longitudinal dimension, suffer from being drawn into the self-generated bubble and seed the two-stream instability in the witness bunch. A possible mechanism to reduce such an effect consists in using emittance-dominated bunch that can contrast the self-focusing force produced by the surrounding bubble.

Emittance pressure dominated regimes for resonant PWFA experiments at SPARC Lab / Marocchino, A.; Atzeni, S.; Chiadroni, E.; Ferrario, M.; Gatti, C; Londrillo, P.; Mostacci, A.; Massimo, F.; Palumbo, L.; Rossi, A.; Sinigardi, S.. - 59:15(2014), pp. 74-74. (Intervento presentato al convegno 56th Annual Meeting of the Division of Plasma Physics, Americal Physical Society tenutosi a New Orleans, Louisiana).

Emittance pressure dominated regimes for resonant PWFA experiments at SPARC Lab

A. Marocchino;S. Atzeni;E. Chiadroni;A. Mostacci;F. Massimo;L. Palumbo;
2014

Abstract

Considerable interest has been shown in the last few years in compact plasma accelerators characterized by extremely high accelerating gradients generated, e.g., by high brightness particle beams. PWFA is currently under investigation at SPARC Lab test facility (Frascati, Italy). Despite 1D model are too simple and limited to catch the whole underlying physics, they offer a simple and fast tool to assess possible working points. We discuss how these models can be analytically modified to extend their validity in the quasi-non-linear regime to phenomenologically account for damping effects. We also present 3D PIC simulations for emittance pressure dominated regimes. We discuss how elongated bunch, with a transverse dimension smaller than the longitudinal dimension, suffer from being drawn into the self-generated bubble and seed the two-stream instability in the witness bunch. A possible mechanism to reduce such an effect consists in using emittance-dominated bunch that can contrast the self-focusing force produced by the surrounding bubble.
2014
56th Annual Meeting of the Division of Plasma Physics, Americal Physical Society
04 Pubblicazione in atti di convegno::04d Abstract in atti di convegno
Emittance pressure dominated regimes for resonant PWFA experiments at SPARC Lab / Marocchino, A.; Atzeni, S.; Chiadroni, E.; Ferrario, M.; Gatti, C; Londrillo, P.; Mostacci, A.; Massimo, F.; Palumbo, L.; Rossi, A.; Sinigardi, S.. - 59:15(2014), pp. 74-74. (Intervento presentato al convegno 56th Annual Meeting of the Division of Plasma Physics, Americal Physical Society tenutosi a New Orleans, Louisiana).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1164075
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