Sep 24 – 30, 2017
La Biodola, Isola d'Elba
Europe/Rome timezone

Mitigation of the hose instability in plasma-wakefield accelerators

Sep 27, 2017, 12:00 PM
SML, Sala Maria Luisa, Hotel Hermitage

SML, Sala Maria Luisa, Hotel Hermitage

talk Invited Plenary Talk Plenary 6


Dr Timon Mehrling (Deutsches Elektronen-Synchrotron DESY)


The hose instability is a long standing challenge for plasma-wakefield accelerators (PWFAs). It is seeded by initial transverse asymmetries of the beam or plasma spatial or momentum distributions. According to current models, the beam centroid displacement is amplified exponentially during the beam propagation in the plasma, resulting in an unstable acceleration process or in beam-breakup. However, particle-in-cell (PIC) simulations indicate that these models overestimate the hosing growth rates as soon as the drive-beam energy change becomes significant. This intriguing result suggests that the blowout regime in PWFA can provide saturation mechanisms for the hose instability, which strongly damp the beam centroid oscillations during propagation. In this contribution, we present a model which describes the saturation mechanisms in excellent agreement with PIC simulations, thereby demonstrating for the first time the possibility of stable beam acceleration in PWFAs over long distances [T. Mehrling et al., PRL 118 174801 (2017)]

Primary authors

Dr Jorge Vieira (Instituto Superior Tecnico) Dr Timon Mehrling (Deutsches Elektronen-Synchrotron DESY)


Dr Alberto Martinez de la Ossa (DESY) Dr Jens Osterhoff (Deutsches Elektronen-Synchrotron DESY) Prof. Ricardo Fonseca (ISCTE - IUL)

Presentation materials