4 papers
The Generation of Variable Polarization States in Terawatt X-Ray Free-Electron Lasers
Henry P. Freund, Patrick G. O'Shea
Terawatt x-ray free-electron lasers (XFELs) represent the frontier in further development of x-ray sources and require high current densities with strong transverse focusing. In th…
Superpower E-Beam Sources and Performance Estimates for Compact THz FELs
Richard B. True, Henry P. Freund, Michael V. Fazio +1
High peak and average power free-electron lasers (FELs) in the terahertz region (THz) require small diameter, low-emittance, and high voltage electron beams. This paper presents tw…
Wakefields In Superconducting RF Cavities and The Impact on VUV Free-electron Laser Oscillator Performance
Alex H. Lumpkin, Henry P. Freund, Matthias Reinsch +1
The Fermilab Accelerator Science and Technology (FAST) facility is currently in operation with its linac based on TESLA-type superconducting rf cavities. Using a 3-MHz micropulse r…
Considerations on wakefield effects in a VUV FELO driven by a superconducting tesla-type linac
Alex H. Lumpkin, Henry P. Freund, Peter Van der Slot
The effects on beam dynamics from long-range and short-range wakefields from TESLA-type cavities are considered in regard to a proposed FEL oscillator (FE-LO) operating at 120 nm.…