The LCLS facility is comprised of a 2-kilometer-long linear accelerator that generates high-energy electron beams. These electrons are then directed into a series of undulator magnets, which cause them to emit X-rays in a coherent, synchronized manner. The resulting X-ray laser pulses are incredibly brief, lasting only a few femtoseconds (one femtosecond is one millionth of one billionth of a second).
One of the unique features of LCLS is its ability to produce X-ray laser pulses with extremely high spatial coherence. This means that the waves of light in the laser beam are precisely synchronized, allowing scientists to obtain detailed images of atoms and molecules. This level of coherence is essential for many scientific experiments, such as determining the structure of proteins or studying the dynamics of chemical reactions in real time.
LCLS has been used to make groundbreaking discoveries in various scientific fields. For instance, it has enabled researchers to observe the atomic structure of viruses and proteins in unprecedented detail, track the motion of atoms during chemical reactions, and understand the behavior of materials under extreme conditions.
In addition to its scientific applications, LCLS has also been used for artistic purposes. In 2016, a group of scientists from SLAC and the University of California, Berkeley, created a nanoscale portrait of the Mona Lisa using LCLS-generated X-ray laser pulses. The portrait, which is the tiniest depiction of the famous artwork ever created, measures only 3 micrometers (one micrometer is one-millionth of a meter) in size.
