Posts by: Tim Wogan
Making noise in the quietest room in the Netherlands
![](http://blog.physicsworld.com/files/2015/11/undulators-500x325.jpg)
Wiggling electrons: an undulator at one of FELIX’s free-electron lasers.
By Tim Wogan in Nijmegen, the Netherlands
Tucked away near the German border is the Dutch city of Nijmegen and Radboud University, which has a treasure trove of fantastical physics facilities. I was in town for a two-day, whistle-stop tour of the university that included the the opening of the FELIX facility. FELIX stands for “free-electron laser for infrared experiments laboratory”. It is a cavernous chamber housing four free-electron lasers that together can generate high-intensity, tunable radiation with wavelengths anywhere between 3–1500 μm. Something, I was told, that is possible nowhere else in the world.