Development of trigger scheme for the ICAL detector of India-based Neutrino Observatory

The India-based Neutrino Observatory (INO) collaboration has proposed to build a 50 kton magnetized Iron Calorimeter (ICAL) detector with the primary goal to study neutrino oscillations, employing Resistive Plate Chambers (RPCs) as active detector elements. Various aspects of a proposed trigger scheme for the ICAL detector are discussed. The associated chance trigger rates are calculated and the trigger efficiency of the scheme for the events of interest for the ICAL detector is determined. An approach toward the implementation of the scheme is also presented.