FEL2026 - 42nd International Free Electron Laser Conference

Session

Novel Accelerator and FEL Concepts (Invited)

FRX

28 Aug 2026, 08:30

128. Greater than 1000-fold Gain in a Free-Electron Laser Driven by a Laser-Plasma Accelerator with High Reliability (FRX01)

Samuel Barber (Lawrence Berkeley National Laboratory)

28/08/2026, 08:30

Session 9: Novel Accelerator and FEL Concepts

Invited Oral Presentation

Compact free-electron lasers (FELs) based on plasma-based accelerators have been envisioned for many years. While recent milestone experiments have demonstrated their feasibility, further progress is required to establish laser-plasma-accelerator-driven FELs as reliable light sources. Demonstrating both full FEL saturation and operational reliability comparable to conventional FEL facilities...

158. Numerical evaluation of FEL instability in the Plasma Discharge Undulator (FRX02)

Andrea Frazzitta (Paul Scherrer Institute)

28/08/2026, 08:55

Session 9: Novel Accelerator and FEL Concepts

Invited Oral Presentation

The plasma discharge undulator (PDU) has recently been proposed as a compact, tunable, fully plasma-based undulation device. In the PDU, a high-current discharge within a capillary generates an azimuthal magnetic field providing strong linear focusing, while a controlled periodic modulation of the discharge axis acts as a geometric driving term, producing well-defined undulator oscillations at...

85. Development and Optimization of LWFA Electron Beams for XUV FEL Generation (FRX03)

YANJUN GU (The University of Osaka)

28/08/2026, 09:20

Session 9: Novel Accelerator and FEL Concepts

Invited Oral Presentation

Free-electron lasers (FELs) provide ultrashort, coherent, and wavelength-tunable radiation for a wide range of scientific applications. Here, we present the demonstration of a laser-wakefield-acceleration (LWFA)-driven FEL operating at a central wavelength of 40 nm. By using a compact 0.8 J laser system and carefully optimizing the plasma density, electron injection, laser wavefront, and...

176. Saturated Soft X-ray FEL based on a hollow plasma channel (FRX04)

Fei Li (Institute of High Energy Physics)

28/08/2026, 09:45

Session 9: Novel Accelerator and FEL Concepts

Invited Oral Presentation

With the development of plasma-based accelerators as a novel acceleration technology, beam phase space manipulation techniques based on plasma wakefields have also gradually begun to be applied, demonstrating their unique advantages in flexibility and device miniaturization compared to traditional beam manipulation techniques. Here, we demonstrate the saturation of a soft X-ray FEL driven by...