Abstract:
Speaker: Jasper van Thor
Coming soon to the department of physics: LUXD is a world unique instrument currently being commissioned in Blackett 009B. LUXD has been designed for femtosecond time resolved chemical crystallography and ultrafast solid state physics. Rather than probing single reflections in Bragg diffraction geometry, which seems to be the predominant method in both UED and time resolved X-ray diffraction in solid state physics, we are pursuing full molecular structure determination by recording all the reflections. For example a 10 Angstrom sized cell will, depending on space group symmetry, yield up to a thousand unique reflections to 1 Angstrom resolution, all of which need to be captured, scaled and merged for structure determination. LUXD is a femtosecond pulsed hard X-ray source for ultrafast time resolved pump-probe studies, based on a laser driven plasma generation. We focus a 5 micrometer wavelength OPCPA generated pulse in vacuum on a moving copper target with creates a line source from plasma that we can capture and use for single crystal diffraction. I will discuss the development of this technique at X-ray free electron lasers (XFELs) and LUXD .