Investigations on capillaries filled with liquid scintillator for high resolution particle tracking

Glass capillaries filled with liquid scintillators of high refractive index are shown to be efficient optical light guides with surface reflection losses at the core/cladding interface of less than one part in 105. In addition new binary liquid scintillator compositions are presented, which are suitable as capillary core medium. Coherent arrays of 20 μm diameter capillaries filled with liquid scintillators are technically feasible and could find interesting applications in particle tracking and vertex detection. In particular a massive vertex detector for τ-lepton detection in ντ charged current interactions is under investigation. (orig.)