Chi-Nu Detector Array
The Chi-Nu Detector array is composed of 20 liquid scintillator neutron detectors and 2 gamma-ray detectors. It is being used to better measure the fission neutron spectrum, especially the high and low end, below 0.6 MeV and above 8 MeV.

A schematic of the Chi-Nu Detector array. (www.wnr.lanl.gov)

A partial detector array looking at fission chamber. (www.wnr.lanl.gov)
Further Information
The Pulse AOT & LANSCE Focus IssueAbout: Target 4 Flight Path 15L (Chi-Nu) | LANSCE
Tovesson. "Nuclear Science Research at the LANSCE-WNR Facility."