DAWOO PARK Dynamics of Globular cluster(GC)is dominated by behaviors of high mass components such as neutron stars or black holes(BHs).In early phase of GC evolution,massive components segregates into cluster core while some fraction are ejected.To investigating the effect of the presence of BH mass function on dynamics and expected BH binary population,we performed N-body simulations of GC containing two BH mass components,10M⊙ and 20 M⊙,with total mass ratios of 2:1 and 5:1.Our results show that higher mass BHs(20 M⊙)escape rather quickly and get depleted from the cluster in the very early stage of cluster evolution.However,10 M⊙ BHs remain for relatively longer time.We find~30%of ejected BHs are in the form of binaries,and some of them could undergo merger within Hubble time by emitting gravitational waves.We find,however,different assumptions on the BH mass spectrum do not change the estimated BH binary merger rate from globular clusters significantly.