Zhehui Wang, Christopher L. Morris
Based on elastic collisions, the linear momentum of a fast neutron can be measured from as few as two and a `half' consecutive recoil ion tracks. If the time-delay between two consecutive recoil ion tracks is also measured, the number of ion track measurements can be reduced to one and a half. The angular resolution and magnitude of neutron moment measurement are limited by ion range straggling to about ten percent. Multi-wire proportional chambers and light-field imaging are discussed for fast neutron tracking. Single-charge or single-photon detection sensitivity would be required in either approach. Light-field imaging is free of charge-diffusion-induced image blur, but the limited number of photons available can be a challenge. $^1$H,$^2$H and $^3$He could be used for initial development of fast neutron trackers based on light-field imaging.
View original:
http://arxiv.org/abs/1210.8218
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