//Some things from the old AliTPCSecGeo
const Float_t z_end = 250.;
-const Float_t alpha_low=0.523598775; // 30 degrees
-const Float_t alpha_up=0.261799387; // 15 degrees
-
-
-
const Float_t q_el = 1.602e-19; // elementary charge
const Float_t adc_sat = 1023; // dynamic range (10 bits)