LNGS spring 2021 test run guillaumon Lowest_floor_of_light_detectors_in_place NTDs ready for gluing Replicable gluing tecnhique Gluing the NTD on the crystal img_20210209_104128 img_20210208_200721 img_20210208_164125 Putting a crystal with reflector foil in place Top light detectors directly sitting on crystals The tower is growing Testing the wires The tower is complete. Yes, the roof is just sitting there, without any screw. Putting a crystal with reflector foil in place Ground floor of crystal in place Light detectors arrived already assembled Lowest floor of light detectors in place Wiring