Synthetic single crystal diamond as a fission reactor neutron flux monitor
2007
Thermal neutron flux monitors were fabricated using chemical vapor deposited single crystal diamond in a p-type/intrinsic/metal/Li6F layered structure. They were placed 80cm above the core midplane of a 1MW research fission reactor, where the maximum neutron flux is 2.2×109neutrons∕cm2s. Good stability and reproducibility of the device response were observed over the whole reactor power range. A 150000counts∕s count rate was measured at the maximum reactor power with no degradation of the detector signal. As the multiple pile-up process due to the slow readout electronics is accounted for, an excellent linearity of the diamond response is observed.
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