In accordance to the ApPEC/ASPERA in its Roadmap Phase I (January 2007): “We recommend that a new large European infrastructure is put forward, as a future international multi-purpose facility on the 100 000 – 1 000 000 ton scale for improved studies on proton decay and of low-energy neutrinos from astrophysical origin. The three detector technologies Water-Cherenkov, Liquid-Scintillator and Liquid-Argon, should be evaluated in the context of a common design study which should also address the underground infrastructure and the possibility of an eventual detection of future accelerator neutrino beams.
The European collaboration LAGUNA has been formed by the LSC, the University Autonoma Madrid (UAM) and another 21 European research institutes. LAGUNA has been funded by the E.U. with 1.7 M€ for its start, with the explicit request of focusing in the Feasibility Studies (FS), mainly geotechnical, of such a facility in the candidate sites (the LSC plus another six), considering all three possible detection technologies [FP7-INFRASTRUCTURES-2007-1, Pro.: 212343-LAGUNA-DS, Funding Scheme: Collaborative Project CP, Duration: 01/07/2008 – 30/06/2010]. Very large underground facilities are also being considered in Japan, in the context of the Hyper-Kamiokande project, and in the USA, as part of the DUSEL project.”
The LAGUNA project finished in June 2011.