publication . Article . Preprint . 2014

Downramp-assisted underdense photocathode electron bunch generation in plasma wakefield accelerators

Knetsch, Alexander; Karger, Oliver; Wittig, Georg; Groth, Henning; Xi, Yunfeng; Deng, Aihua; Rosenzweig, James Benjamin; Bruhwiler, David Leslie; Smith, Johnathan; Jaroszynski, Dino Anthony; ...
Open Access
  • Published: 15 Dec 2014
  • Publisher: eScholarship, University of California
  • Country: United States
Abstract
It is shown that the requirements for high quality electron bunch generation and trapping from an underdense photocathode in plasma wakefield accelerators can be substantially relaxed through localizing it on a plasma density downramp. This depresses the phase velocity of the accelerating electric field until the generated electrons are in phase, allowing for trapping in shallow trapping potentials. As a consequence the underdense photocathode technique is applicable by a much larger number of accelerator facilities. Furthermore, dark current generation is effectively suppressed.
Subjects
arXiv: Physics::Accelerator PhysicsPhysics::Plasma Physics
free text keywords: physics.acc-ph, physics.plasm-ph, Physics - Accelerator Physics, Physics - Plasma Physics
Funded by
EC| EUCARD-2
Project
EUCARD-2
Enhanced European Coordination for Accelerator Research & Development
  • Funder: European Commission (EC)
  • Project Code: 312453
  • Funding stream: FP7 | SP4 | INFRA
,
EC| LASERLAB-EUROPE
Project
LASERLAB-EUROPE
The Integrated Initiative of European Laser Research Infrastructures III
  • Funder: European Commission (EC)
  • Project Code: 284464
  • Funding stream: FP7 | SP4 | INFRA
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