It's 54 million times smaller than the Large Hadron Collider.
By Ryan Whitwam October 27, 2023
https://www.extremetech.com/science/sci ... -of-a-coin
The Large Hadron Collider (LHC) continues to amaze and delight scientists as it teases apart the most intricate natural phenomena in the universe. It's just so big, though. Researchers have successfully activated a tiny particle accelerator that's not even pocket-sized—it could get lost in your pocket. The nanophotonic electron accelerator (NEA) is the size of a small coin, but it could have a big impact.
The nanophotonic electron accelerator is a microchip just a few millimeters across, designed by scientists at Germany's Friedrich–Alexander University of Erlangen–Nuremberg (FAU). Inside is an even more minuscule vacuum tube, inside which are thousands of microscopic pillars. The chip is designed to accelerate electrons, which are negatively charged, by firing short laser pulses at the pillars. This technology was proposed in 2015, but this is the first time one has been tested.