Okay, so you know how sometimes doctors need to see what's going on inside your body? They do this by taking an x-ray.
Now, imagine if they had a really special x-ray machine that could take pictures of things that are super small, like tiny particles. That's what an x-1 x-ray source does!
It's like a tiny little machine that shoots out really powerful x-rays. Scientists use it to study things that are too small to see with our own eyes, like atoms and molecules.
The "x-1" part just means it's a specific type of x-ray source. It's really important for scientists to have these machines so they can learn more about how things work at the tiniest level, which can help us create new medicines and technologies.