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AMoRE

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AMoRE
NameAMoRE
TypeScientific experiment
FieldParticle physics, Nuclear physics
LocationYonggwang County, South Korea
Established2011
DetectorsScintillating bolometers, Metallic magnetic calorimeters
StatusActive

AMoRE

AMoRE is a rare-event search experiment that investigates neutrinoless double beta decay using molybdate-based scintillating bolometers. The collaboration unites institutions from South Korea, Russia, United States, China, and Czech Republic to deploy cryogenic detector arrays in deep underground laboratories for ultra-low background measurements. The project interlinks techniques and expertise from experiments such as CUORE, GERDA, EXO-200, KamLAND-Zen, and Majorana Demonstrator while contributing to global efforts exemplified by SuperNEMO and SNO+.

Overview

AMoRE focuses on detecting lepton-number-violating processes by searching for a peak at the Q-value of the isotope in question, informed by theoretical work associated with Enrico Fermi, Wolfgang Pauli, Maria Goeppert Mayer, and nuclear matrix element calculations linked to researchers from Oak Ridge National Laboratory and Lawrence Berkeley National Laboratory. The experiment centers on isotopically enriched calcium molybdate crystals, connecting technology trajectories seen in KamLAND, Borexino, CUORE-0, and LUCIFER. AMoRE’s strategy parallels methodological developments from Cryogenic Dark Matter Search and EDELWEISS while pursuing sensitivities comparable to projected aims of nEXO and LEGEND.

Scientific goals and significance

The primary scientific aim is to determine whether neutrinos are Majorana fermions, a question shaped by theoretical milestones including the Seesaw mechanism and work by Peter Minkowski, Gell-Mann, Ramond, and Slansky. Positive detection would have implications for baryogenesis scenarios such as Leptogenesis and cosmological constraints from Planck (spacecraft), WMAP, and neutrino-mass limits from KATRIN. Secondary goals include precision measurements that inform nuclear structure studies connected to Argonne National Laboratory and TRIUMF, and background characterization relevant to experiments at Gran Sasso National Laboratory and SNOLAB.

Experimental design and detector technology

AMoRE employs scintillating bolometers consisting of calcium molybdate crystals (CaMoO4) enriched in the isotope 100Mo, integrating phonon and photon readout similar to approaches developed by CRESST and CUORE. The detectors operate at millikelvin temperatures using dilution refrigerators inspired by cryogenic techniques from Institut Laue-Langevin and National Institute of Standards and Technology. Readout systems include metallic magnetic calorimeters and transition-edge sensors with heritage in ALPS II and XENONnT prototyping. Material screening and radiopurity campaigns draw on methods used by HEIDELBERG-MOSCOW, ELEGANT V, and NEMO-3 to suppress backgrounds from isotopes catalogued by International Atomic Energy Agency datasets. Shielding and veto systems replicate designs tested at Boulby Mine, Homestake Mine, and Kamioka Observatory.

Location and facilities

AMoRE detectors are housed in an underground facility located in Yonggwang County within the Yangyang Underground Laboratory complex and have connections to Korea Atomic Energy Research Institute infrastructure and support from regional universities such as Seoul National University and Yonsei University. The laboratory environment provides overburden similar to Modane Underground Laboratory and Laboratori Nazionali del Gran Sasso to reduce cosmic-ray muon flux. Cleanroom assembly, low-level counting, and isotope enrichment resources are coordinated with partners including Russian Academy of Sciences institutes and Brookhaven National Laboratory collaborators.

Data acquisition and analysis

Data acquisition relies on high-sampling-rate digitizers, FPGA-based trigger systems, and slow-control frameworks patterned after installations at LIGO Laboratory and ITER instrumentation groups. Analysis pipelines implement pulse-shape discrimination, multivariate classifiers, and Monte Carlo simulations using toolkits developed at CERN and by teams behind GEANT4. Systematic uncertainties leverage calibration campaigns with sources used in GALLEX and SAGE, and blind analysis procedures inspired by Daya Bay and MINOS. Statistical interpretation employs frequentist and Bayesian methods utilized in landmark results from Fermilab and CERN collaborations such as ATLAS and CMS.

Results and publications

AMoRE has reported background characterization studies, energy resolution benchmarks, and projected half-life sensitivities in preprints and peer-reviewed articles disseminated through journals where groups like Physical Review Letters, Physical Review C, and Journal of High Energy Physics commonly publish. Early-phase prototypes demonstrated competitive energy resolution comparable to results from CUORE and GERDA Phase II, while background-reduction measures echo findings from Majorana Demonstrator publications. AMoRE’s data contribute to global limits on effective Majorana neutrino mass interpreted alongside constraints from Planck, KATRIN, and oscillation data from Super-Kamiokande and IceCube.

Collaborations and funding

The collaboration comprises researchers and institutions including Korea Advanced Institute of Science and Technology, Institute for High Energy Physics (Protvino), Moscow State University, Pusan National University, and University of California, Berkeley. Funding and logistical support have been provided by national agencies such as Korea Ministry of Science and ICT, Russian Foundation for Basic Research, U.S. Department of Energy, and grant mechanisms similar to those from National Research Foundation of Korea and European Research Council consortia. International coordination mirrors governance models used by projects like ITER and CERN experiments to manage shared resources, data rights, and publication policies.

Category:Neutrinoless double beta decay experiments Category:Particle physics experiments Category:Scientific organizations established in 2011