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Spontaneous generation of athermal phonon bursts within bulk silicon causing excess noise, low energy background events and quasiparticle poisoning in superconducting sensors
C. L. Chang, Y. -Y. Chang, M. Garcia-Sciveres +25
Solid state phonon detectors used in the search for dark matter and coherent neutrino nucleus interactions (CENS) require excellent energy resolution (eV-scale or below) and low…
Photomultiplier Requirements and Pre-Calibration for the SABRE South Liquid Scintillator Veto
L. J. Milligan, P. Urquijo, E. Barberio +32
We present a study of the oil-proof base Hamamatsu R5912 photomultiplier tubes that will be used in the SABRE South linear-alkylbenzene liquid scintillator veto. SABRE South is a d…
Characterisation of Hamamatsu R11065-20 PMTs for use in the SABRE South NaI(Tl) Crystal Detectors
O. Stanley, W. J. D. Melbourne, P. Urquijo +31
The SABRE Experiment is a direct detection dark matter experiment using a target composed of multiple NaI(Tl) crystals. The experiment aims to be an independent check of the DAMA/L…
The SABRE South Technical Design Report Executive Summary
E. Barberio, T. Baroncelli, V. U. Bashu +42
In this technical design report (TDR) executive summary we describe the SABRE South detector to be built at the Stawell Underground Physics Laboratory (SUPL). The SABRE South detec…
Low Energy Backgrounds and Excess Noise in a Two-Channel Low-Threshold Calorimeter
Robin Anthony-Petersen, Clarence L. Chang, Yen-Yung Chang +29
We describe observations of low energy excess (LEE) events, background events observed in all light dark matter direct detection calorimeters, and noise in a Transition Edge Sensor…
The Design, Implementation, and Performance of the LZ Calibration Systems
J. Aalbers, D. S. Akerib, A. K. Al Musalhi +200
LUX-ZEPLIN (LZ) is a tonne-scale experiment searching for direct dark matter interactions and other rare events. It is located at the Sanford Underground Research Facility (SURF) i…
The Data Acquisition System of the LZ Dark Matter Detector: FADR
J. Aalbers, D. S. Akerib, A. K. Al Musalhi +213
The Data Acquisition System (DAQ) for the LUX-ZEPLIN (LZ) dark matter detector is described. The signals from 745 PMTs, distributed across three subsystems, are sampled with 100-MH…
First Demonstration of the HeRALD Superfluid Helium Detector Concept
R. Anthony-Petersen, A. Biekert, C. L. Chang +33
The SPICE/HeRALD collaboration is performing R&D to enable studies of sub-GeV dark matter models using a variety of target materials. Here we report our recent progress on instrume…
A portable and high intensity 24 keV neutron source based on Sb-Be photoneutrons and an iron filter
A. Biekert, C. Chang, L. Chaplinsky +27
A portable monoenergetic 24 keV neutron source based on the Sb-Be photoneutron reaction and an iron filter has been constructed and characterized. The coincidence of th…
A Stress Induced Source of Phonon Bursts and Quasiparticle Poisoning
Robin Anthony-Petersen, Andreas Biekert, Raymond Bunker +43
The performance of superconducting qubits is degraded by a poorly characterized set of energy sources breaking the Cooper pairs responsible for superconductivity, creating a condit…
Performance of the SABRE detector module in a purely passive shielding
F. Calaprice, J. B. Benziger, S. Copello +19
We present here a characterization of the low background NaI(Tl) crystal NaI-33 based on a period of almost one year of data taking (891 kgxdays exposure) in a detector configurati…
A backing detector for order-keV neutrons
A. Biekert, L. Chaplinsky, C. W. Fink +23
We have designed and tested a large-area (0.15~m) neutron detector based on neutron capture on \ce{^{6}Li}. The neutron detector design has been optimized for the purpose of ta…
A Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics
J. Aalbers, K. Abe, V. Aerne +591
The nature of dark matter and properties of neutrinos are among the most pressing issues in contemporary particle physics. The dual-phase xenon time-projection chamber is the leadi…
Scintillation yield from electronic and nuclear recoils in superfluid He
HeRALD Collaboration, A. Biekert, C. Chang +30
Superfluid He is a promising target material for direct detection of light ( 1 GeV) dark matter. Possible signal channels available for readout in this medium include prompt…
High sensitivity characterization of an ultra-high purity NaI(Tl) crystal scintillator with the SABRE proof-of-principle detector
F. Calaprice, S. Copello, I. Dafinei +23
We present new results on the radiopurity of a 3.4-kg NaI(Tl) crystal scintillator operated in the SABRE proof-of-principle detector setup. The amount of potassium contamination, d…
Zone refining of ultra-high purity sodium iodide for low-background detectors
Burkhant Suerfu, Frank Calaprice, Michael Souza
There has been a growing interest in ultra-high purity, low-background NaI(Tl) crystals for dark matter direct searches. Past research indicates that zone refining is an efficient…
Projected sensitivity of the LUX-ZEPLIN (LZ) experiment to the two-neutrino and neutrinoless double beta decays of Xe
The LUX-ZEPLIN, Collaboration, : +194
The projected sensitivity of the LUX-ZEPLIN (LZ) experiment to two-neutrino and neutrinoless double beta decay of Xe is presented. LZ is a 10-tonne xenon time projection ch…
Characterization of SABRE crystal NaI-33 with direct underground counting
M. Antonello, I. J. Arnquist, E. Barberio +43
Ultra-pure NaI(Tl) crystals are the key element for a model-independent verification of the long standing DAMA result and a powerful means to search for the annual modulation signa…
Growth of Ultra-high Purity NaI(Tl) Crystal for Dark Matter Searches
Burkhant Suerfu, Masayuki Wada, Winston Peloso +4
The annual modulation of scintillation event rate observed by the DAMA/LIBRA experiment has been a long-standing controversy in the quest of the direct detection of dark matter. Th…
Monte Carlo simulation of the SABRE PoP background
M. Antonello, E. Barberio, T. Baroncelli +45
SABRE (Sodium-iodide with Active Background REjection) is a direct dark matter search experiment based on an array of radio-pure NaI(Tl) crystals surrounded by a liquid scintillato…
The SABRE project and the SABRE PoP
M. Antonello, E. Barberio, T. Baroncelli +46
SABRE aims to directly measure the annual modulation of the dark matter interaction rate with NaI(Tl) crystals. A modulation compatible with the standard hypothesis in which our Ga…
Response of a proportional counter to Ar and Ge: measured spectra versus Geant4 simulation
D. N Abdurashitov, Yu. M Malyshkin, V. L. Matushko +1
The energy deposition spectra of Ar and Ge in a miniature proportional counter are measured and compared in detail to the model response simulated with Geant4. A cert…
Scintillation efficiency measurement of Na recoils in NaI(Tl) below the DAMA/LIBRA energy threshold
Jingke Xu, Emily Shields, Frank Calaprice +18
The dark matter interpretation of the DAMA modulation signal depends on the NaI(Tl) scintillation efficiency of nuclear recoils. Previous measurements for Na recoils have large dis…
High Resolution Muon Computed Tomography at Neutrino Beam Facilities
Burkhant Suerfu, Christopher G. Tully
X-ray computed tomography (CT) has an indispensable role in constructing 3D images of objects made from light materials. However, limited by absorption coefficients, X-rays cannot…