FEL2026 - 42nd International Free Electron Laser Conference

Recent development of Hard X-Ray Self-Seeding design and experiment tests for LCLS-II-HE high repetition rate operation

TUB03

25 Aug 2026, 11:52

16m

Contributed Oral Presentation Session 5: Seeded FEL Seeded FEL (Contributed)

Speaker

Ye Hong (SLAC National Accelerator Laboratory)

Description

To overcome the thermal load challenges at the high-rep rate HXR self-seeding FELs, we summarize the recent design and experimental test progress. The LCLS-II-HE is designed to have cryo-cooled HXRSS system. To validate the design and prototype, experiment tests have been carried out on the diamond and the related mounting and clamping schemes. Wavefront sensors and single-shot spectrometers are used to quantitatively characterize these thermal-acoustic effects on crystals and HXRSS FEL. We will report recent design updates, experimental testing, hardware-readiness progress, and planned future validation for the LCLS-II-HE hard X-ray self-seeding system and related X-ray optics.