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Felix Wagner (HEPHY Vienna)16/07/2022, 09:00
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Jules GASCON16/07/2022, 09:15
Review on Low-Energy Excess Signals Observed in Cryogenic Rare Event Search Experiments
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Daniel Baxter (Fermi National Accelerator Laboratory)16/07/2022, 09:45
Review on Excess Signals Observed in CCD Detectors
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Youssef Sarkis Mobarak (ICN-UNAM), Daniel Baxter (Fermi National Accelerator Laboratory)16/07/2022, 10:45
We study the ionization and light yields produced by nuclear recoils at low
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energies in pure crystals and noble liquids in the context of Lindhard's
integral equation, incorporating the effects of binding energy, improved
modeling of the electronic stopping, and electronic straggling. We
consider three different models for the electronic stopping power that
incorporate Coulomb repulsion... -
Francisco Andres Vazquez de Sola16/07/2022, 11:10
The New Experiment With Sphere-Gas (NEWS-G) employs spherical proportional counters (SPC) filled with gas to search for elastic scattering of WIMPs off light target nuclei, reaching sensitivities down to single ionisation electrons. The new-generation detector consists of a larger sphere of 140 cm diameter, equipped with a new multi-anode sensor, ”ACHINOS”, developed to ensure a sufficiently...
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Dr Valentina Novati (Northwestern University)16/07/2022, 11:35
The 1-gram silicon HVeV detectors developed within the Super Cryogenic Dark Matter Search (SuperCDMS) collaboration have achieved single-photon sensitivity and a baseline resolution of $\sigma=2.7$ eV. These cryogenic calorimeters can be operated in two configurations: (1) as phonon-assisted charge amplifiers by exploiting the Neganov-Trofimov-Luke (NTL) effect; (2) without NTL voltage (0V) by...
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Dominik Raphael Fuchs (Max Planck Society (DE))16/07/2022, 13:30
CRESST, similarly to many other experiments, observes an unexpected excess of events at low
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energies. So far no conclusive explanation of its origin was found. The current CRESST-III data
taking campaign is dedicated to study and possibly identify the nature of this Low Energy Excess
(LEE). We are operating a variety of detector modules differing in target materials, geometries and
holding... -
Dr Hugues LATTAUD16/07/2022, 13:55
The EDELWEISS collaboration has extensively studied the population of events with no ionization signal ("Heat-Only" events) in its cryogenic germanium detector equipped with Ge-NTD sensors. It recently developed and operated in an low-radioactivity underground environment a new generation of cryogenic germanium detectors equipped with NbSi thin-film sensors able to detect out-of-equilibirum...
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Daniel Mckinsey16/07/2022, 14:20
A number of low mass dark matter direct detection experiments have observed an excess rate of events, rising sharply below energies of around 100 eV. A similar source of background energy has been observed to shorten the coherence time of superconducting quantum bits by creating excess quasiparticles in the qubit circuit. The relaxation of stress in detector materials has been shown to cause...
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Geon-Bo Kim16/07/2022, 14:45
MAGNETO is developing dark matter and neutrino detectors using magnetic quantum sensors with sub-microsecond timing resolution for phonon pulse shape discrimination in eV region. Such fast timing resolution improves separation of electron recoil background, microphonic noise, and thermal noises due to events from substrates and surrounding materials. I will discuss findings from MAGNETO R&D...
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sergey pereverzev (LLNL)16/07/2022, 14:50
Interest in detecting coherent elastic scattering of low-energy neutrinos, dark matter particles and physics beyond the standard model brings numerous experiments involving low-temperature solid-state Detectors. The excess low-energy background was found in numerous experiments, with a wide range of detector mass, and using various readout channels: luminescence, conductivity, temperature, or...
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Matti Heikinheimo (University of Helsinki and Helsinki Institute of Physics)16/07/2022, 15:40
The threshold displacement energy in solid state detector materials varies from several eV to ~100 eV. If a stable or long lived defect is created as a result of a nuclear recoil event, some part of the recoil energy is stored in the deformed lattice and is therefore not observable in a phonon detector. Thus, an accurate model of this effect is necessary for precise calibration of the recoil...
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thierry lasserre16/07/2022, 16:05
Future experiments on coherent neutrino scattering near nuclear reactors using cryogenic solid-state phonon-mediated detectors have their global signal for the energy transferred to the target nucleus in the range of a few tens to a hundred electron volts. In this range, the creation of permanent or long-lived crystal defects can have a significant effect on the reconstruction of the true...
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16/07/2022, 16:30
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CONNIE collaboration
The Coherent Neutrino-Nucleus Interaction Experiment (CONNIE), located at sea level at about 30 m from the core of the 3.8 GW Angra 2 nuclear reactor in Brazil, aims to detect the coherent elastic scattering of reactor antineutrinos (CEvNS). The experiment has operated from 2016 to 2020 using 12 fully depleted high-resistivity 4k x 4k CCDs (Charge Coupled Devices) with 6 g each, with a readout...
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topic still under discussion
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