SiPM prototype for direct VUV registration

A number of proposed experiments aimed at dark matter studies are based on detection of luminescence in liquid argon at 128 nm. Existing solid-state photomultipliers do not have the capability to detect emission at 128 nm in the photon counting mode. Spectral properties of a new silicon photomultiplier prototype for vacuum ultraviolet registration are presented. The prototype demonstrates the photon detection efficiency about 1% in 112-182 nm range.