Scientists see the light to better X-rays
SCIENTISTS have created the brightest light ever produced on Earth, shining a billion times stronger than the surface of the sun.
And, when they shone the “unimaginably” bright beam, the researchers discovered it could be used as a new type of X-ray, capable of taking higher-resolution images than the traditional kind.
These could be used in hospitals but also by engineers and scientists and for security purposes.
When light strikes an object, it scatters – an effect that enables our eyes to see it. Normally an electron scatters just one photon of light at a time, but the light beam produced in the University of Nebraska-Lincoln’s Extreme Light Laboratory saw nearly 1 000 photons scattered at a time.
Dr Donald Umstadter, one of the researchers, said: “When we have this unimaginably bright light, it turns out that the scattering – this fundamental thing that makes everything visible – fundamentally changes in nature. It’s as if things appear differently as you turn up the brightness of the light, which is not something you normally would experience.
“(An object) normally becomes brighter but otherwise it looks just like it did with a lower light level. But here, the light is changing (the object’s) appearance. The light is coming off at different angles, with different colours, depending on how bright it is.”
He said the X-ray properties of the light could be used to take three-dimensional images down to the nanoscopic scale. This could be used to find tiny tumours or microfractures that are missed by conventional X-rays, the researchers believe.
It might also be useful as an ultrafast camera to take images of chemical reactions or electrons as they move, among other potential uses by scientists.
“There were many theories, for many years, that had never been tested in the lab because we never had a bright enough light source to actually do the experiment,” Umstadter said. – The Independent