The 200th reactor cycle has just started at the ILL

With the resumption of regular reactor operations, the ILL will now deliver 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 thanks to the dedicated commitment of the reactor teams, instrument scientists and support staff, who ensure the smooth running of the facility and assist users during their time at the ILL.

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

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