Brinkmann R, Delbos N, Dornmair I, Kirchen M, Assmann R, Behrens C, Floettmann K, Grebenyuk J, Gross M, Jalas S, Mehrling T, Martinez de la Ossa A, Osterhoff J, Schmidt B, Wacker V, Maier A R
Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany.
Center for Free-Electron Laser Science and Department of Physics, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
Phys Rev Lett. 2017 May 26;118(21):214801. doi: 10.1103/PhysRevLett.118.214801. Epub 2017 May 23.
Plasma-based accelerators offer the possibility to drive future compact light sources and high-energy physics applications. Achieving good beam quality, especially a small beam energy spread, is still one of the major challenges. Here, we propose to use a periodically modulated plasma density to shape the longitudinal fields acting on an electron bunch in the linear wakefield regime. With simulations, we demonstrate an on-average flat accelerating field that maintains a small beam energy spread.
基于等离子体的加速器为驱动未来紧凑型光源和高能物理应用提供了可能性。实现良好的束流质量，特别是小的束流能量分散，仍然是主要挑战之一。在此，我们提议使用周期性调制的等离子体密度来塑造线性尾场区域中作用于电子束团的纵向场。通过模拟，我们展示了一个平均平坦的加速场，该场能保持较小的束流能量分散。
