The Large-Scale Cryogenic Gravitational Wave Telescope (KAGRA) Group announced today that the L-shaped 7 km tunnel underground Mt. Ikenoyama, Kamioka, is now complete and ready to host the 3-km-scale cryogenic interferometer designed to directly detect gravitational waves for the fist time in history. KAGRA is principally operated by ICRR, with two main joint-research institutions, KEK and NAOJ, involving 231 scientists from 31 institutions worldwide.
The collaboration will soon start the installation of laboratory facilities and detector components, in preparation for the initial operation at the end of 2015. The full-scale operation is planned to start in JFY2017.