Argontube: an R&D Liquid Argon Time projection Chamber

For future neutrino oscillation experiments new large mass scale detectors are needed. One possible type of such detectors could be a liquid Argon Time Projection Chamber (LArTPC). Some technical challenges need to be addressed, like the purity of the LAr, the high voltage supply and calibration. To face these challenges, an R&D program is under development at the LHEP of the University of Bern. The goal is to reach a drift length of 5 m in liquid Argon and prove the feasibility of large volume TPCs. In this article, different aspects of the technology will be reviewed and recent achievements presented.