The ANNIE detector was upgraded for full science operation in July 2019, and data collection began in 2020.
Notes on verification
Confirmed by multiple independent sources including official Fermilab/ANNIE materials, a DOE technical report, and a peer-reviewed proceeding, all consistent on the July 2019 upgrade completion and 2020 data collection start.
Sources
- Accelerator Neutrino Neutron Interaction Experiment (en.wikipedia.org)
- https://arxiv.org/pdf/1910.08715 (arxiv.org)
- https://annie.fnal.gov/ (annie.fnal.gov)
- https://news.fnal.gov/2019/11/annie-poised-to-take-data-on-neutrino-nucleus-interactions/ (news.fnal.gov)
- https://www.ph.nat.tum.de/en/e66/research/neutrino-physics-dark-matter-searches-with-large-volume-liquid-detectors/annie/ (ph.nat.tum.de)
- https://www.osti.gov/servlets/purl/1959527 (osti.gov)