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Neutron emissions in a low energy 3.3 kJ (15 kV) plasma focus are studied. The system is operated in deuterium and deuterium-argon admixtures. Enhancement of the neutron yield is obtained with a suitable amount of highZadmixture. Time resolved neutron measurements are made by using four detectors positioned at two different distances at both the end-on and side-on direction. Maxwellian pulse fitting techniques are employed to resolve a two phase neutron emission history. The neutron energy and anisotropy for the two phases are determined. The energy and anisotropy of the two phases are found to be different and that the second phase is of high anisotropy. These results confirm the presence of two phases of neutron emission that are possibly due to at least two different kinds of neutron production mechanisms in the low energy plasma focus.
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Yap et al. (2005) studied this question.
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