WA105: A large LAr double phase TPC prototype

For the next generation of long baseline neutrino oscillation experiments detectors with several tens of ktons of detection medium will be needed. Liquid argon (LAr) is ideal for this application since it allows the construction of fully sensitive time projection chambers (TPCs). A mandatory step between the current setups and the final detector for the long baseline experiment is the construction of a large prototype to prove the technical feasibility of the scaling. WA105 with a size of 6×6×6 m$^3$ is this intermediate step for the detector concept of a LAr double phase TPC and will be presented in these proceedings.