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P-ONE Cluster 1 deployment and first photon-rate measurements in the deep Pacific

P-ONE Collaboration (Agostini et al.)

25 Apr 2026 · arXiv:2405.15860 · preprint ·arXiv:2405.15860

Abstract digest

P-ONE Cluster 1 — seven 1-km-long strings with 70 optical modules each — was deployed at the Cascadia Basin site in November 2025. First-light photon-rate measurements confirm absorption length and scattering length within design specification; full-cluster operation begins May 2026.

Editor's takeaway

P-ONE moves from R&D to operational. First diffuse-astrophysical-flux paper expected within 18 months.

Editorial digest in preparation.


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