Influence of a Static Magnetic Field on Beam Emittance in Laser Wakefield Acceleration
- 1 CEA, DAM, DIF, Arpajon, France
- 2 CEA, DAM, DIF, Arpajon, France
- 3 CEA, DAM, DIF, Arpajon, France
- 4 CEA, DAM, DIF, Arpajon, France
Abstract
The enhancement of trapping and the optimization of beam quality are two key issues of Laser Wakefield Acceleration (LWFA). The effect of a homogenous constant magnetic field B 0 , parallel to the direction of propagation of the pump pulse, is studied in the blowout regime via 2D x 3Dv Particle-In-Cell simulations. Electrons are injected into the wake using a counter-propagating low amplitude laser. Transverse currents are generated at the rim of the bubble, which results in the amplification of the B 0 field at the rear of the bubble. Therefore the dynamics of the beam is modified, the main effect is the reduction of the transverse emittance when B 0 is raised. Depending on beam loading effects the low energy tail, observed in the non-magnetized case, can be suppressed when B 0 is applied , which provid es a mono-energetic beam.
- T. Tajima and J. M. Dawson, “Laser Electron Accelerator,” Physical Review Letters, Vol. 43, No. 4, 1979, pp. 267-270. doi:10.1103/PhysRevLett.43.267
- E. Esarey, R. F. Hubbard, W. P. Leemans, A. Ting and P. Sprangle, “Electron Injection into Plasma Wakefields by Colliding Laser Pulses,” Physical Review Letters, Vol. 79, No. 14, 1997, pp. 2682-2685. doi:10.1103/PhysRevLett.79.2682
- J. Faure, Y. Glinec, A. Pukhov, S. Kiselev, S. Gordienko, E. Lefebvre, J.-P. Rousseau, F. Burgy and V. Malka, “A Laser-Plasma Accelerator Producing Monoenergetic Electron Beams,” Nature, Vol. 431, No. 7008, 2004, pp. 541-544. doi:10.1038/nature02963
- S. P. D. Mangles, C. D. Murphy, Z. Najmudin, A. G. R. Thomas, J. L. Collier, A. E. Dangor, E. J. Divall, P. S. Foster, J. G. Gallacher, C. J. Hooker, D. A. Jaroszinski, A. J. Langley, W. B. Mori, P. A. Norreys, F. S. Tsung, R. Viskup, B. R. Walton and K. Krushelnick, “Monoenergetic Beams of Relativistic Electrons from Intense Laser-plasma Interactions,” Nature, Vol. 431, No. 7008, 2004, pp. 535-538. doi:10.1038/nature02939
- J. B. Rosenzweig, B. Breizman, T. Katsouleas and J. J. Su, “Acceleration and Focusing of Electrons in Two Dimensional Nonlinear Plasma Wakefields,” Physical Review A, Vol. 44, No. 10, 1991, pp. R6189-R6192. doi:10.1103/PhysRevA.44.R6189
- W. Lu, C. Huang, M. Zhou, W. B. Mori and T. Katsouleas, “Nonlinear Theory for Relativistic Plasma Wakefields in the Blowout Regime,” Physical Review Letters, Vol. 96, No. 16, 2006, pp. 165002-1-165002-4. doi:10.1103/PhysRevLett.96.165002
- A. Pukhov and J. Meyer-ter-Vehn, “Laser Wakefield Acceleration: The Highly Non-Linear Broken-Wave Regime,” Applied Physics B, Vol. 74, No. 4-5, 2002, pp. 355-361. doi:10.1007/s003400200795
- S. Gordienko and A. Pukhov, “Scalings for Ultrarelativistic Laser Plasmas and Quasimono Energetic Electrons,” Physics of Plasmas, Vol. 12, No. 4, 2005, pp. 043109-1- 043109-11.
- J. Faure, C. Rechatin, A. Norlin, A. Lifschitz, Y. Glinec and V. Malka, “Controlled Injection and Acceleration of Electrons in Plasma Wakefields by Colliding Laser Pulses,” Nature, Vol. 444, No. 7120, 2006, pp. 737-739. doi:10.1038/nature05393
- X. Davoine, E. Lefebvre, J. Faure, C. Rechatin, A. Lifschitz and V. Malka, “Simulation of Quasimonoenergetic Electron Beams Produced by Colliding Pulse Wakefield Acceleration,” Physics of Plasmas, Vol. 15, No. 11, 2008, pp. 113102-1-113102-11. doi:10.1063/1.3008051
- W. Lu, M. Tzoufras, C. Joshi, F. S. Tsung, W. B. Mori, J. Vieira, R. A. Fonseca and L. O. Silva, “Generating Multi-GeV Electron Bunches Using Single Stage Laser Wake-field Acceleration in a 3D Nonlinear Regime,” Physical Review Special Topics—Accelerators and Beams, Vol. 10, No. 6, 2007, pp. 061301-1-061301-12. doi:10.1103/PhysRevSTAB.10.061301