A prototype detector for directional measurement of the cosmogenic neutron flux
This paper describes a novel directional neutron detector. The low pressure time projection chamber uses a mix of helium and CF[subscript 4] gases. The detector reconstructs the energy and angular distribution of fast neutron recoils. This paper reports results of energy calibration using an α sourc...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
Elsevier
2016
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| Online Access: | http://hdl.handle.net/1721.1/102199 https://orcid.org/0000-0003-3226-787X https://orcid.org/0000-0002-9970-108X https://orcid.org/0000-0002-6393-0438 |
| Summary: | This paper describes a novel directional neutron detector. The low pressure time projection chamber uses a mix of helium and CF[subscript 4] 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% CF[subscript 4]–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 ∼40% for fluorine recoils and ∼60% for helium recoils. |
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