Author: Maier, A.R.
Paper Title Page
TUP022 The Implementation of 3D Undulator Fields in the Unaveraged FEL Simulation Code Puffin 416
  • J. Henderson, L.T. Campbell, B.W.J. MᶜNeil
    USTRAT/SUPA, Glasgow, United Kingdom
  • A.R. Maier
    CFEL, Hamburg, Germany
  • A.R. Maier
    Uni HH, Hamburg, Germany
  Funding: We acknowledge STFC MoA 4132361; ARCHIE-WeSt HPC, EPSRC grant EP/K000586/1; John von Neumann Institute for Computing (NIC) on JUROPA at Jlich Supercomputing Centre (JSC), under project HHH20
The FEL simulation code Puffin is modified to include 3D magnetic undulator fields. Puffin, having previously used a 1D undulator field, is modified to accommodate general 3D magnetic fields. Both plane and curved pole undulators have been implemented. The electron motion for both agrees with analytic predictions.
Laser-Plasma Acceleration in Hamburg  
  • A.R. Maier
    CFEL, Hamburg, Germany
  Plasma-based accelerators promise ultra-compact sources of highly relativistic electron beams, especially suited for driving novel x-ray light sources. The stability and reproducability of laser-plasma generated beams however, is still not comparable to conventional machines. Within the LAOLA Collaboration, the University of Hamburg and DESY work closely together to combine university research with the expertise of a large and well-established accelerator facility. We will discuss the experimental programm and plasma-related activities in Hamburg, with a special focus on the recently commissioned 200 TW laser ANGUS. Integrated in the REGAE facility, it drives two beamlines to study external injection of electron into a plasma stage, as well as plasma-driven undulator radiation. present the recently commissioned 200 TW laser ANGUS and the experimental program in Hamburg. One of the pilot applications of a plasma accelerator is a compact FEL. As an outlook, I will discuss the concepts and experimental strategies towards a first proof-of-concept FEL experiment using plasma-driven electron beam available today.
on behalf of the LAOLA Collaboration
FRB04 Divergence Reduction and Emittance Conservation in a Laser Plasma Acceleration Stage 999
  • A.R. Maier, I. Dornmair
    CFEL, Hamburg, Germany
  • K. Flöttmann
    DESY, Hamburg, Germany
  Plasma accelerators promise a compact source of highly relativistic electron beams. Driven by high-intensity lasers or high-energetic electron beams, the longitudinal and transverse electric fields inside the plasma cavitiy support the generation of GeV electron beams over m-scale distances, while measured emittances on the order of 0.1 mm.mrad have been reported from plasma-driven accelerators. However, it remains challenging to conserve this excellent emittance when coupling from the plasma into vacuum and a subsequent beam optics, especially when considering the large energy spread, typically accumulated during the off-crest acceleration inside the plasma. Recently, we presented an analytical solution [1] to describe an adiabatic matching from the plasma into vacuum. Further elaborating this concept [2], we will discuss the generation of low-divergence electron beams from a tailored plasma target in order to preserve the emittance generated within the plasma. We will apply our concept to an externally injected electron bunch, that is matched in and out of a tailored plasma target, generating a GeV-level electron beam with low divergence and good emittance.
* K. Floettmann, Phys. Rev. ST - Accel. Beams 17, 054402 (2014)
** I. Dornmair, K. Floettmann, and A. R. Maier, submitted (2014)