Energy Spread Reduction of Electron Beams Produced Via Laser Wakefield Acceleration

Released on by Bradley Bolt Pollock
preview-18

  • Energy Spread Reduction of Electron Beams Produced Via Laser Wakefield Acceleration Book Detail

  • Author : Bradley Bolt Pollock
  • Release Date : 2012
  • Publisher :
  • Genre :
  • Pages : 87
  • ISBN 13 : 9781267331335
  • File Size : 7,7 MB
DOWNLOAD BOOK

Energy Spread Reduction of Electron Beams Produced Via Laser Wakefield Acceleration by Bradley Bolt Pollock PDF Summary

Book Description: Laser wakefield acceleration of electrons holds great promise for producing ultra-compact stages of GeV scale, high quality electron beams for applications such as x-ray free electron lasers and high energy colliders. Ultra-high intensity laser pulses can be self-guided by relativistic plasma waves over tens of vacuum diffraction lengths, to give>1 GeV energy in cm-scale low density plasma using ionization-induced injection to inject charge into the wake at low densities. This thesis describes a series of experiments which investigates the physics of LWFA in the self-guided blowout regime. Beginning with high density gas jet experiments the scaling of the LWFA-produced electron beam energy with plasma electron density is found to be in excellent agreement with both phenomenological theory and with 3-D PIC simulations. It is also determined that self-trapping of background electrons into the wake exhibits a threshold as a function of the electron density, and at the densities required to produce electron beams with energies exceeding 1 GeV a different mechanism is required to trap charge into low density wakes. By introducing small concentrations of high-Z gas to the nominal He background the ionization-induced injection mechanism is enabled. Electron trapping is observed at densities as low as 1.3x1018 cm−3 in a gas cell target, and 1.45 GeV electrons are demonstrated for the first time from LWFA. This is currently the highest electron energy ever produced from LWFA. The ionization-induced trapping mechanism is also shown to generate quasi-continuous electron beam energies, which is undesirable for accelerator applications. By limiting the region over which ionization-induced trapping occurs, the energy spread of the electron beams can be controlled. The development of a novel two-stage gas cell target provides the capability to tailor the gas composition in the longitudinal direction, and confine the trapping process to occur only in a limited, defined region. Using this technique a 460 MeV electron beam was produced with an energy spread of 5%. This technique is directly scalable to multi-GeV electron beam generation with sub-percent energy spreads.

Disclaimer: www.yourbookbest.com does not own Energy Spread Reduction of Electron Beams Produced Via Laser Wakefield Acceleration books pdf, neither created or scanned. We just provide the link that is already available on the internet, public domain and in Google Drive. If any way it violates the law or has any issues, then kindly mail us via contact us page to request the removal of the link.

Frontiers in High Energy Density Physics

Frontiers in High Energy Density Physics

File Size : 85,85 MB
Total View : 3874 Views
DOWNLOAD

Recent scientific and technical advances have made it possible to create matter in the laboratory under conditions relevant to astrophysical systems such as sup