An imaging technique conceived 50 years ago has been successfully demonstrated at SLAC’s Linac Coherent Light Source, where it is expected to improve results in a range of experiments, including studies of extreme states of matter formed by shock waves.
The method, called ptychography (tie-KAW-grah-fee), was originally developed to capture data that was otherwise missing or difficult to collect in crystallography experiments, in which X-ray light scatters off crystallized samples to form diffraction patterns that reveal the sample’s structure.
In recent years, ptychography has been rediscovered as a powerful tool for measuring the properties of X-ray beams and understanding imperfections in the focusing tools at synchrotrons and other X-ray research facilities, allowing scientists to better interpret and refine their data.
n experiments last year at the LCLS, researchers used ptychography to sharpen images made with the Matter in Extreme Conditions instrument, which specializes in transforming materials into ultrahot, ultradense states.
“For imaging it’s very important,” said Andreas Schropp, a visiting physicist who was the lead author of a paper focusing on the LCLS experiment, published April 9 in Nature Publishing Group’s Scientific Reports. “Without it, you are not able to separate the properties of the X-ray pulses from the real features you have in the sample.”
Read more at: Phys.org