Non-ionising radiation at CERN spans the electromagnetic spectrum up to the near-ultraviolet with frequency range 0 Hz−10 THz. The major sources are LASERs, Radio Frequency (RF), high voltage power lines, electrical substations, power supplies, magnets for accelerators, cell phone GSM repeaters, cell phones, Bluetooth, WiFi and satellite links.
Other equipments that contain potential sources of non-ionising radiation such as magnetic/electromagnetic fields and infrared radiation (e.g. power supply circuits, transformers, lasers…) are used at CERN. With the aim to protect its personnel, visitors, the public and the environment, CERN ensures that no detectable non-ionising radiation is emitted beyond the fences of CERN's sites.
Lasers at ISOLDE. RILIS experiment. (Image: CERN)