Assembly of XENONnT Cleanroom at LNGS. Foto: Roberto Corrieri/XENON

The upcoming XENONnT detector, the next phase in our dark matter program, will have a dark matter target about three times larger than that of XENON1T. This means that all dimensions of the instruments are about 50% larger and thus require more space for the cleaning of the detector components and for detector assembly. For this reason, the class ISO-5/6 XENON cleanroom is currently being moved to a new above-ground space at LNGS, where it is re-built with a 50% increased footprint and a partially increased height.

The last action seen by the “old” cleanroom before its decommissioning were very successful tests of the TPC electrodes for XENONnT.