Diagnosing neutron yield for interaction of laser-cluster in SILEX-I

High-energy deuterons can be produced by ultraintense and ultrashort laser pulse interacting with CD4 cluster, and induce deuterium-deuterium (DD) fusion. This cluster fusion neutron source has extensive application. DD nuclear fusion has been performed on SILEX-I Ti:Sapphire laser system using 200 TW/30 fs laser pulses focused on CD4 cluster with f/2.7 optics. Neutron yield of DD fusion is measured by high sensitivity neutron detector. With this experimental condition, only 103 neutrons are observed．