The cased hole Compensated Neutron tool uses dual, high temperature, ruggedized He3 thermal neutron detectors to measure formation porosity through casing and cement.
    The tool uses a side load 16CU. AmBe neutron source. The combined with a gamma ray and/or dual receiver Cement Bond Log, the data is multiplexed with the gamma ray, CCL, and CBL data in a single pass in the well.