Entopistic Scintillators

Trajectories of cosmic rays through a Goddard Space Flight Center - Max Planck Institute balloon-borne experiment will be determined by pulse height analyzing the signals from each of the two or more phototubes coupled to each scintillator. Thin or tapered scintillators produce sufficiently strong gradients of phototube signal with respect to scintillation position that position uncertainties of ¿ 1 cm can be achieved over ~ 1m2 areas. Calculations and some test results for entopistic, or position determining, scintillators are presented.