Analysis of Microphonic Noise Genesis and Mitigation in a Boron Carbide Detector System
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Boron lined ion chambers designed to monitor thermal flux between the fuel rods of a TRIGA Mark II pool type reactor were found to have excessive electronic and microphonic noise which overwhelmed the neutron signal in preliminary measurements. In order to effectively evaluate the detectors sensitivity to electrical and microphonic noise, a testing apparatus was constructed to provide consistent and reproducible geometry and decibel sound levels from test equipment. After careful testing, it was found that the main microphonic susceptibility was because of the triboelectric effect within the coaxial cable. This was eliminated with the use of a low-noise cable. Once the electronic noise was minimized and new cables were installed, an improved neutron measurement was made.
Gordon, William (2015). Analysis of Microphonic Noise Genesis and Mitigation in a Boron Carbide Detector System. Master's thesis, Texas A & M University. Available electronically from