Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8181879 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2012 | 10 Pages |
Abstract
This paper describes a novel directional neutron detector. The low pressure time projection chamber uses a mix of helium and CF4 gases. The detector reconstructs the energy and angular distribution of fast neutron recoils. This paper reports results of energy calibration using an α source and angular reconstruction studies using a collimated neutron source. The best performance is obtained with a 12.5% CF4-87.5% He gas mixture. At low energies the target for fast neutrons transitions is primarily helium, while at higher energies, the fluorine contributes as a target. The reconstruction efficiency is both energy and target dependent. For neutrons with energies less than 20 MeV, the reconstruction efficiency is â¼40% for fluorine recoils and â¼60% for helium recoils.
Related Topics
Physical Sciences and Engineering
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Instrumentation
Authors
J. Lopez, K. Terao, J.M. Conrad, D. Dujmic, L. Winslow,