Optical fiber read-out for liquid argon scintillation light
  In this paper we describe the performance of a light detector for Ar scintillation light made of wavelength-shifting (WLS) fibers connected to Silicon-Photomultipliers (SiPM). The setup was conceived to be used as anti-Compton veto for high purity germanium (HPGe) detectors operated directly in liquid Argon (LAr). Background suppression efficiencies for different radioactive sources were measured in a test cryostat with about 800 kg LAr. This work was part of the R\&D effort for the GERDA experiment. 
J. Janicsk\'o Cs\'athy, T.Bode, J. Kratz, S. Sch\"onert, Ch. Wiesinger
physics.ins-det hep-ex