학술논문
X-ray absorption spectroscopy using an ultrafast laboratory-scale laser-plasma accelerator source
Document Type
Working Paper
Author
Kettle, B.; Colgan, C.; Los, E.; Gerstmayr, E.; Streeter, M. J. V.; Albert, F.; Astbury, S.; Baggott, R. A.; Cavanagh, N.; Falk, K.; Hyde, T. I.; Lundh, O.; Rajeev, P. P.; Riley, D.; Rose, S. J.; Sarri, G.; Spindloe, C.; Svendsen, K.; Symes, D. R.; Smid, M.; Thomas, A. G. R.; Thornton, C.; Watt, R.; Mangles, S. P. D.
Source
Subject
Language
Abstract
The absorption profile of the copper K-edge was measured over a 250 eV window using ultrashort X-rays from a laser-plasma wakefield accelerator. For the first time with a femtosecond probe, Extended X-ray Absorption Fine Structure (EXAFS) features were observed in a single shot, detailing the local atomic structure. This unique capability will allow the investigation of novel ultrafast processes, and in particular probing high energy density matter and physics far-from-equilibrium. A perspective on the additional strengths of a laboratory-based ultrafast X-ray absorption source is presented.