Neutron Time-of-Flight Detector

2013:

Shown here is a new neutron time-of-flight detector

A new neutron time-of-flight (nTOF) detector was qualified for use on OMEGA. This detector is similar to an earlier device but has a larger scintillator volume for improved signal-to-noise measurements of deuterium-tritium fusion neutrons that scatter in the compressed fuel of cryogenic implosions. The spectrum of the scattered fusion neutrons is one of the key measurements used to infer the implosion performance. The detector includes additional photomultiplier tubes configured to measure different parts of the neutron spectrum emitted during such implosions. All of the neutron-spectrum-based implosion-performance measurements can now be made along a single line of sight from the target. The red ellipse shows the location of the hole in the Target Bay floor that is part of the collimated line of sight from the target chamber center to the detector.