Simulation studies of the HADES first level trigger PART II: Performance   in hadron induced reactions
  The HADES first level trigger is studied for the system p+Ni at a beam energy of 2 AGeV. The timing properties of the trigger signal are reported. The efficiency loss due to deadtime is specified. A trigger requirement of a time overlap window with the start detector is described. The trigger rates for different overlap windows are given. 
R.Schicker and H. Tsertos (Univ. of Cyprus)