Compact THz Streaking Framework for Robust Longitudinal Diagnostics in Advanced Accelerators

by Gerard Lawler (Paul Scherrer Institute)

Monday 8 Jun 2026, 16:00 → 17:00 Europe/Zurich

We present a combined experimental and simulation study of terahertz (THz) streaking as a compact and flexible tool for longitudinal diagnostics in electron accelerator environments. By using image-domain comparison metrics and other optimal transport techniques applied to streaked and un-streaked beam profiles, we improve the robustness of longitudinal bunch measurements in realistic conditions, including nonlinear streaking fields, time-of-arrival jitter, and beam transport distortions. Using data collected at the Karlsruhe Institute of Technology (KIT) FLUTE accelerator to validate these observables, we explore optimized THz streaking geometries and beamline configurations through coupled electromagnetic and particle-tracking simulations, achieving improved signal-to-noise performance. The resulting framework provides a scalable diagnostic approach applicable to advanced accelerators spanning from compact beamlines at the university scale up to large emerging facilities like EuPRAXIA at ELI Beamlines where conventional RF-based diagnostics are impractical.