A neutron streak image tube has been designed with high detection efficiency. The large-area photocathode (f 10 mm) consists of CsI on an Al foil, which is backed with a piece of polyethylene (CH2). The tube has no slit and the cross-over of the electron beam is focused on the front surface of the MCP. The calculated time resolution is 43 ps for 14.1 MeV neutrons. It is estimated that our tube can record signals from the implosion of DT-filled targets producing yields of 1 108 neutrons with a target to photocathode distance of 5 cm. The neutron streak image tube also can be used to determine the temperature of the plasma of the implosion of DT-filled targets by measuring the Doppler broadening.