Journal
REVIEW OF SCIENTIFIC INSTRUMENTS
Volume 83, Issue 10, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4739230
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The NIF neutron activation diagnostic suite relies on removable activation samples, leading to operational inefficiencies and a fundamental lower limit on the half-life of the activated product that can be observed. A neutron diagnostic system measuring activation of permanently installed samples could remove these limitations and significantly enhance overall neutron diagnostic capabilities. The physics and engineering aspects of two proposed systems are considered: one measuring the Zr-89/(89)mZr isomer ratio in the existing Zr activation medium and the other using potassium zirconate as the activation medium. Both proposed systems could improve the signal-to-noise ratio of the current system by at least a factor of 5 and would allow independent measurement of fusion core velocity and fuel areal density. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4739230]
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