Investigation of ASIC-based signal readout electronics for LEGEND-1000
- Max Planck Inst. fuer Physik, Munich (Germany); Technical Univ. of Munich (Germany)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Max Planck Inst. fuer Physik, Munich (Germany); Technical Univ. of Munich (Germany)
- XGLab SRL, Bruker Nano Analytics, Milano (Italy)
- Max Planck Inst. fuer Physik, Munich (Germany)
- North Carolina State Univ., Raleigh, NC (United States); Triangle Univ. Nuclear Lab., Durham, NC (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Laboratori Nazionali del Gran Sasso, Assergi (Italy)
- Univ. of North Carolina, Chapel Hill, NC (United States); Triangle Univ. Nuclear Lab., Durham, NC (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Technical Univ. of Munich (Germany)
- Jagiellonian Univ., Kraków (Poland)
LEGEND, the Large Enriched Germanium Experiment for Neutrinoless ββ Decay, is a ton-scale experimental program to search for neutrinoless double beta (0νββ) decay in the isotope 76Ge with an unprecedented sensitivity. Building on the success of the low-background 76Ge-based GERDA and Majorana Demonstrator experiments, the LEGEND collaboration is targeting a signal discovery sensitivity beyond 1028 yr on the decay half-life with approximately 10 t∙yr of exposure. Signal readout electronics in close proximity to the detectors plays a major role in maximizing the experiment's discovery sensitivity by reducing electronic noise and improving pulse shape analysis capabilities for the rejection of backgrounds. However, the proximity also poses unique challenges for the radiopurity of the electronics. Application-specific integrated circuit (ASIC) technology allows the implementation of the entire charge sensitive amplifier (CSA) into a single low-mass chip while improving the electronic noise and reducing the power consumption. In this work, we investigated the properties and electronic performance of a commercially available ASIC CSA, the XGLab CUBE preamplifier, together with a p-type point contact high-purity germanium detector. We show that low noise levels and excellent energy resolutions can be obtained with this readout. Moreover, we demonstrate the viability of pulse shape discrimination techniques for reducing background events.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF)
- Grant/Contract Number:
- AC02-05CH11231; FG02-97ER41041; FG02- 97ER41033; AC05-00OR22725; 1743790; 1812409
- OSTI ID:
- 1756164
- Alternate ID(s):
- OSTI ID: 1892393
- Journal Information:
- Journal of Instrumentation, Vol. 15, Issue 09; ISSN 1748-0221
- Publisher:
- Institute of Physics (IOP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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