Improvement of spectral resolution in the presence of periodic noise and microphonics for hyper-pure germanium detector gamma-ray spectrometry using a new digital filter

A new digital filter has been investigated for removing low-frequency periodic noise from the output signal of hyper-pure germanium detectors (HPGe). Sources of noise examined include microphonics and simulated low-frequency noise (via input sinusoidal wave forms). In this paper, three distinctly di...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 2007-01, Vol.271 (1), p.101-106
Main Authors: Schultz, M. K., Keyser, R. M., Trammell, R. C., Upp, D. L.
Format: Article
Language:English
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Summary:A new digital filter has been investigated for removing low-frequency periodic noise from the output signal of hyper-pure germanium detectors (HPGe). Sources of noise examined include microphonics and simulated low-frequency noise (via input sinusoidal wave forms). In this paper, three distinctly different detector/mechanical-cooler combinations were investigated Removal of the periodic noise induced from 'outside' environmental sources, such as ground loops, is investigated using an input sinusoidal wave generator. The LFR not only improved spectral resolution across all energies in two of three detector/mechanical cooler combinations, but also removed simulated periodic noise from 100 to 3 kHz.
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-007-0113-5