Ultrafast neutron detector

This patent describes a neutron detector, for measuring neutrons leaving a source that is approximately a point source. The detector comprising: a circularly curved two-conductor traveling-wave transmission line, comprising a first conductor and a second conductor; means for applying a reverse bias to the conductors of the transmission line; means for launching an electric field pulse along the transmission line; a circularly curved uranium cathode, comprising part of the first conductor of the transmission line, with the transmission line being circularly curved along the general locus of the uranium cathode, and with the uranium cathode being adapted to be positioned everywhere approximately equidistant from the source