The 200th reactor cycle has just started at the ILL

With regular operations now resumed, the ILL is providing three reactor cycles per year, corresponding to around 170 days of neutron beam time across its full suite of instruments. Each cycle is made possible by the commitment of the reactor teams, instrument scientists and support staff who ensure the smooth operation of the facility and assist users during their time at the ILL.

During the first cycle of 2026, the ILL welcomed 745 distinct users from 36 countries that conducted 513 experiments across its instruments.

With the 200^th cycle now underway, the ILL continues to support an international scientific community working on major challenges in health, energy, the environment, fundamental physics and quantum technologies.