Engineering advancements in x-ray pump–probe techniques: delayline for attosecond sciences at LCLS

TUOA04
16 Sept 2025, 14:00
20m
Science Village Hall (The Loop)

Science Village Hall

The Loop

Lund, Sweden
Contributed Oral Presentation Beamlines and Instruments Beamlines Session 1

Speaker

Hengzi Wang (SLAC National Accelerator Laboratory)

Description

X-ray pump–probe techniques at XFELs have revolutionized ultrafast science by enabling precise control of X-ray pulse pairs with tunable delays. This talk highlights key engineering breakthroughs in LCLS behind two critical methods: magnetic chicane systems and split-and-delay optics. Magnetic chicane systems manipulate electron and photon beams to generate delays up to hundreds of femtoseconds, with LCLS upgrades extending tunable delays from 0 to 10 fs for attosecond-resolution studies. Split-and-delay optics use Laue crystals, diamond gratings, or mirrors to divide, delay, and recombine X-ray pulses, achieving delays from femtoseconds to sub-nanoseconds. We will explore the engineering challenges of designing, aligning, and stabilizing these systems, including high-precision mechanics, advanced control systems, and real-time diagnostics. Ongoing upgrades are enhancing performance and expanding opportunities in condensed matter physics, chemistry, and materials science, pushing the boundaries of ultrafast X-ray science.

Funding Agency

Funding for this research is provided by: the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515

Authors

Agostino Marinelli (SLAC National Accelerator Laboratory) Hengzi Wang (SLAC National Accelerator Laboratory) James Cryan (SLAC National Accelerator Laboratory) Namrata Balakrishnan (SLAC National Accelerator Laboratory) Randy Whitney (SLAC National Accelerator Laboratory) Taran Driver (SLAC National Accelerator Laboratory) Yoshio Ichii (SLAC National Accelerator Laboratory)

Presentation materials

There are no materials yet.