The neutrino beam used by ANNIE originates at Fermilab, where the Booster delivers 8 GeV protons to a beryllium target, producing secondary pions and kaons.
Notes on verification
Confirmed by multiple independent ANNIE collaboration papers and Fermilab BNB technical documentation describing the 8 GeV proton beam striking a beryllium target to produce pions/kaons that decay into neutrinos.
Sources
- Accelerator Neutrino Neutron Interaction Experiment (en.wikipedia.org)
- https://annie.fnal.gov/ (annie.fnal.gov)
- https://ar5iv.labs.arxiv.org/html/1504.01480 (ar5iv.labs.arxiv.org)
- https://arxiv.org/pdf/2508.11111 (arxiv.org)
- https://arxiv.org/pdf/2510.26050 (arxiv.org)
- https://arxiv.org/pdf/1503.01520 (arxiv.org)
- https://targets.fnal.gov/BNB_neutrino_beam.html (targets.fnal.gov)
- https://www.osti.gov/biblio/2446889 (osti.gov)