期刊
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
卷 68, 期 3, 页码 359-367出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TNS.2020.3043671
关键词
Gamma-ray detectors; neutrinoless double-beta decay
资金
- U.S. Department of Energy, Office of Science, Office of Nuclear Physics [DE-AC02-05CH11231, DE-AC0500OR22725, DE-AC05-76RL0130, DE-FG02-97ER41020, DE-FG02-97ER41033, DE-FG02-97ER41041, DE-SC0012612, DE-SC0014445, DE-SC0018060, LANLE9BW, LANLEM77]
- National Science Foundation [MRI-0923142, PHY-1003399, PHY1102292, PHY-1206314, PHY-1614611, PHY-1812409, PHY-1812356]
- U.S. Department of Energy through the Lawrence Berkeley National Laboratory (LBNL)/Laboratory Directed Research and Development (LDRD) Program
- U.S. Department of Energy through the Los Alamos National Laboratory (LANL)/LDRD Program
- U.S. Department of Energy through the Pacific Northwest National Laboratory (PNNL)/LDRD Program
- Russian Foundation for Basic Research [15-02-02919]
- Natural Sciences and Engineering Research Council of Canada [SAPIN-2017-00023]
- Canada Foundation for Innovation John R. Evans Leaders Fund
- Oak Ridge Leadership Computing Facility, Oak Ridge National Laboratory
- National Energy Research Scientific Computing Center
- U.S. Department of Energy Office of Science User Facility
- U.S. Department of Energy (DOE) [DE-SC0018060, DE-SC0014445] Funding Source: U.S. Department of Energy (DOE)
In order to achieve high-resolution spectral analysis and efficient pulse shape discrimination in experiments, non-linearities in analog-to-digital conversion (ADC) were carefully measured and corrected, significantly reducing systematic energy uncertainty.
Imperfections in analog-to-digital conversion (ADC) cannot be ignored when signal digitization requirements demand both wide dynamic range and high resolution, as is the case for the MAJORANA DEMONSTRATOR Ge-76 neutrinoless double-beta decay search. Enabling the experiment's high-resolution spectral analysis and efficient pulse shape discrimination required careful measurement and correction of ADC nonlinearities. A simple measurement protocol was developed that did not require sophisticated equipment or lengthy data-taking campaigns. A slope-dependent hysteresis was observed and characterized. A correction applied to digitized waveforms prior to signal processing reduced the differential and integral nonlinearities by an order of magnitude, eliminating these as dominant contributions to the systematic energy uncertainty at the double-beta decay Q value.
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