2015/03/20 by Feichao Fu, Rui Wang, Pengfei Zhu +18 · 54 citations
Engineering · Physics and Astronomy · #Atomic physics #Beam (structure) #Bunches #Cathode ray #Chirp #Electron #Gyrotron and Vacuum Electronics Research #Laser #Laser beam quality #Nuclear physics #Optics #Particle Accelerators and Free-Electron Lasers #Particle accelerator #Particle accelerators and beam dynamics #Physics #Quadrupole #Thermal emittance #Ultrafast electron diffraction #Ultrashort pulse #physics.acc-ph
paper · pdf · doi:10.1103/physrevlett.114.114801
published in Physical Review Letters 114(11), 114801 (American Physical Society) · 5 pages, 5 figures
openalex publication_date 2015/03/20 · arxiv created 2015/03/24 · arxiv updated 2015/03/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
High quality electron beams with flat distributions in both energy and current are critical for many accelerator-based scientific facilities such as free-electron lasers and MeV ultrafast electron diffraction and microscopes. In this Letter, we report on using corrugated structures to compensate for the beam nonlinear energy chirp imprinted by the curvature of the radio-frequency field, leading to a significant reduction in beam energy spread. By using a pair of corrugated structures with orthogonal orientations, we show that the quadrupole wakefields, which, otherwise, increase beam emittance, can be effectively canceled. This work also extends the applications of corrugated structures to the low beam charge (a few pC) and low beam energy (a few MeV) regime and may have a strong impact in many accelerator-based facilities.