X-ray split and delay device for ultrafast x-ray science at the AMO instrument at LCLS

[摘要] Ultrafast molecular dynamics can be studied using x-rays from both synchrotrons sources and x-ray free electron lasers. Synchrotron studies are limited by the 10-100 ps duration pulses to processes where the Auger lifetime can be used to probe dynamics initiated by excitation of an inner-shell electron to an antibonding orbital. The short pulses produced by x-ray free electron lasers offer the opportunity to study molecular dynamics directly with pump-probe techniques. A two-mirror x-ray split and delay device has been developed for x- ray pump - x-ray probe experiments at the soft x-ray AMO instrument at the LCLS. The device operates over a photon energy range of 250-1800 eV with a variable delay of up to 200 femtoseconds with 0.1 fs resolution.

[发布机构] Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin BP 48, Gif-sur-Yvette Cedex; 91192, France^1;LCLS, SLAC National Accelerator Laboratory, Menlo Park; CA; 94025, United States^2;Center for High Energy Density Science, University of Texas at Austin, Austin; TX; 78712, United States^3;Physics Department, Western Michigan University, Kalamazoo; MI; 49008, United States^4;Department of Physics and Astronomy, University of Turku, Turku; FI-20014, Finland^5;Physics Department, University of Connecticut, Storrs; CT; 06269, United States^6

[关键词] Antibonding orbital;Inner-shell electrons;Photon energy range;Pump-probe technique;Synchrotron studies;Variable delays;X-ray free electron lasers;X-ray science