Proton beam self-modulation seeded by electron bunch in plasma with density ramp

Research output: Contribution to journalArticlepeer-review

Abstract

Seeded self-modulation in a plasma can transform a long proton beam into a train of micro-bunches that can excite a strong wakefield over long distances, but this needs the plasma to have a certain density profile with a short-scale ramp up. For the parameters of the AWAKE experiment at CERN we numerically study which density profiles are optimal if the self-modulation is seeded by a short electron bunch. With the optimal profiles, it is possible to 'freeze' the wakefield at approximately half the wavebreaking level. High-energy electron bunches (160 MeV) are less efficient seeds than low-energy ones (18 MeV), because the wakefield of the former lasts longer than necessary for efficient seeding.

Original languageEnglish
Article number115025
Number of pages10
JournalPlasma Physics and Controlled Fusion
Volume62
Issue number11
DOIs
Publication statusPublished - Nov 2020

Keywords

  • Plasma wakefield acceleration
  • Proton beam
  • Seeded self-modulation
  • AWAKE EXPERIMENT
  • plasma wakefield acceleration
  • proton beam
  • seeded self-modulation

Fingerprint

Dive into the research topics of 'Proton beam self-modulation seeded by electron bunch in plasma with density ramp'. Together they form a unique fingerprint.

Cite this