2015/12/25 by Aakash A. Sahai, Sahai, Aakash A., T. Katsouleas +2
Engineering · Physics and Astronomy · #Accelerator Physics (physics.acc-ph) #Atomic and Molecular Physics #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Laser-Plasma Interactions and Diagnostics #Particle accelerators and beam dynamics #Plasma Physics (physics.plasm-ph) #hep-ex #physics.acc-ph #physics.plasm-ph
paper · pdf · doi:10.48550/arxiv.1512.08013
Proceedings of IPAC2015, Richmond, VA, USA 3: Alternative Particle Sources and Acceleration Techniques A22 - Plasma Wake eld Acceleration http://accelconf.web.cern.ch/AccelConf/IPAC2015/papers/wepje001.pdf, 2015 (ISBN 978-3-95450-168-7) pp 2674-2677
arxiv created 2015/12/25 · openalex publication_date 2015/12/25 · arxiv updated 2015/12/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
A positron-beam interacting with the plasma electrons drives radial suck-in, in contrast to an electron-beam driven blow-out in the over-dense regime, nb>n0. In a homogeneous plasma, the electrons are radially sucked-in from all the different radii. The electrons collapsing from different radii do not simultaneously compress on-axis driving weak fields. A hollow-channel allows electrons from its channel-radius to collapse simultaneously exciting coherent fields. We analyze the optimal channel radius. Additionally, the low ion density in the hollow allows a larger region with focusing phase which we show is linearly focusing. We have shown the formation of an ion-wake channel behind a blow-out electron bubble-wake. Here we explore positron acceleration in the over-dense regime comparing an optimal hollow-plasma channel to the ion-wake channel. The condition for optimal hollow-channel radius is also compared. We also address the effects of a non-ideal ion-wake channel on positron-beam excited fields.