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Mr Chuanya Cao (Institute of High Energy Physics)
Acrylic is widely used in low background experiments such as underground neutrino experiments and dark matter experiments around the world for its good transmittance, low radioactive background and good chemical compatibility with water and liquid scintillator. Jiangmen underground neutrino oscillation experiment (JUNO) has a 35.4 meters diameter 566-ton acrylic sphere shell for holding liquid...
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Dr Zhi Zeng (Tsinghua University)
China JinPing underground Laboratory(CJPL) is the deepest underground lab with 2400 meters rock overburden. In the past dedade, two dark matter experiments( CDEX and PandaX) and one solar neutrino experiment had been settled in the Jinping-I, and 2 low-background gamma spectrometers(GeTHUs) are also put into routine measurement. Since available space room less in Jinping-I, the construction of...
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Anselmo Meregaglia (Centre National de la Recherche Scientifique (FR))
The search for neutrinoless double beta decay could cast light on one critical piece missing in our knowledge i.e. the nature of the neutrino mass. Its observation is indeed the most sensitive experimental way to prove that neutrino is a Majorana particle. The observation of such a potentially rare process demands a detector with an excellent energy resolution, an extremely low radioactivity...
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Gowoon Kim (IBS)
The gamma transitions with E$_{\gamma}$ > 3 MeV from decays of $^{208}$Tl have not been observed and their transition intensities were known only as upper limit values. We measured a ThO$_2$ powder using a 100$\%$ HPGe (High Purity Germanium) detector to obtain more accurate numbers of the transition intensities. This study is expected to help understanding nuclear decay properties of the...
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Susana Cebrian (Universidad de Zaragoza)
The ANAIS (Annual modulation with NaI(Tl) Scintillators) experiment aims at the confirmation or refutation of the DAMA/LIBRA positive annual modulation signal in the low energy detection rate, using the same target and technique, at the Canfranc Underground Laboratory (LSC) in Spain. ANAIS-112, consisting of nine 12.5 kg NaI(Tl) modules produced by Alpha Spectra Inc., is taking data...
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Mr Florian Jörg (Max-Planck-Institut für Kernphysik, Heidelberg)
For many current detectors aimed at rare-event searches, radon is a dominating source of background. These experiments can strongly benefit from the reduction of ${}^{222}\mathrm{Rn}$ that is released by metallic surfaces within the setup. A new radon mitigation strategy employing thin surface coatings has been studied and significant reduction factors of the ${}^{220}\mathrm{Rn}$ and...
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Giulia D'Imperio (Sapienza Universita e INFN, Roma I (IT))
SABRE (Sodium Iodide with Active Background Rejection) is a new project to search for the annually modulating signal expected from Dark Matter (DM), using an array of ultra-pure NaI(Tl) detectors surrounded by an active scintillator veto to further reduce the intrinsic and external background.
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The first phase of the experiment is the SABRE Proof of Principle (PoP), a single 5-kg crystal... -
Brian Fujikawa
The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment searching for neutrinoless double beta decay (0νββ) that has been able to reach the one-ton scale. The detector, located at the Laboratori Nazionali del Gran Sasso in Italy, consists of an array of 988 TeO$_{2}$ crystals arranged in a compact cylindrical structure of 19 towers. The construction of...
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Dr Gloria Luzón (Universidad de Zaragoza)
TREX-DM and IAXO-D0 are gaseous TPC detectors equipped with Micromegas readout planes. TREX-DM is intended to search for low mass wimps while IAXO-D0 is a prototype of one of the detectors of the future IAXO (International Axion Observatory). In both cases, background models in the lowest energy region are essential to study the discovery potential of these experiments and to understand...
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Janina Hakenmüller
Coherent elastic neutrino nucleus scattering with the CONUS experiment
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speaker: Janina Hakenmüller for the CONUS collaboration
The CONUS experiment is located at the nuclear power plant of Brokdorf, Germany, at 17m
distance from the reactor core. It aims at detecting coherent elastic neutrino nucleus scattering with
four high-purity point contact Germanium detectors with a noise threshold... -
Alexander Fuss (Vienna University of Technology)
The COSINUS (Cryogenic Observatory for SIgnatures seen in Next-generation Underground Searches) project is in the final planning phase of building up the experiment at an underground site.
Crystals made of NaI will be operated as cryogenic detectors to search for DM-nucleus scattering with the aim of probing the long-standing results of the DAMA/LIBRA collaboration. Operating the detectors at...
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V. Mokina for the CRESST Collaboration
The CRESST (Cryogenic Rare Event Search with Superconducting Thermometers) is a direct dark matter search experiment, located at the Laboratori Nazionali del Gran Sasso (LNGS) in Italy, where an overburden of 1400m of rock (3800m water equivalent) provides an efficient reduction of the cosmic radiation background.
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In the CRESST experiment, ~25g scintillating $\mathrm{CaWO_4}$ crystals are... -
Dr Krzysztof Pelczar (LNGS)
Basing on the successful operation of the DarkSide-50 detector, the DarkSide Collaboration is now constructing DarkSide-20k, a direct WIMP search detector utilizing a two-phase Liquid Argon Time Projection Chamber (LArTPC). With a rejection factor for discrimination between electron and nuclear recoils in LAr of >3×10^9, use of the veto system and utilizing silicon photomultipliers in the LAr...
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Mrs Emma Meehan (Boulby Underground Laboratory)
For more than three decades UK astrophysicists have been operating experiments to search for Dark Matter 1100m below ground in a purpose-built 'low-background' facilities at Boulby mine in the North East of England. This facility - the Boulby Underground Laboratory - is one of just a few places in the world suited to hosting these and other science projects requiring a 'quiet environment',...
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Laura Cardani (INFN - National Institute for Nuclear Physics)
Superconducting circuits are emerging as leading candidates in the development of Quantum Bits (qubits). Their main limit with respect to the other technologies resides in the poor coherence time, i.e. the time in which they retain a quantum behaviour. The DEMETRA project proposes environmental radioactivity as one of the sources of decoherence: interactions in the substrates on which the...
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Grzegorz Zuzel (Jagiellonian University in Krakow)
Determination of 210Po in metals and electronic components down to 0.5 mBq/kg
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T. Mróz, P. Czudak, M. Wojcik, G. Zuzel
Institute of Physics, Jagiellonian University, Krakow, Poland
The bottom part of the 238U chain, containing 210Pb, 210Bi and 210Po is difficult to detect. 210Pb emits low energy betas and a weak gamma (46.4 keV) with relatively low probability thus, gamma ray spectrometers... -
Dr Massimiliano Nastasi (INFN Milano-Bicocca)
In nuclear and particle physics experiments, reduction of radioactive intrinsic background is one of the keys for the success of the experiments. In many cases the radioactive background generated from decay products of radio nuclides such as $^{232}$Th, $^{238}$U and $^{40}$K could exactly overlap the observable energy regions of interest.
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In this context it is crucial to develop... -
Dr Guillaume Eurin (Max-Planck-Institut für Kernphysik, Heidelberg)
In the current state of rare-event searches, an increase in target mass is necessary to improve the experiments sensitivity. This will be the case of the multi-ton liquid xenon DARWIN detector aiming at the direct detection of dark matter as well as studying neutrino physics. Even if very low background levels have already been achieved in such detectors, further control and reduction are both...
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Dr Laszlo Csedreki (Gran Sasso Science Institute, Viale F. Crispi 7, L’Aquila, Italy, INFN, Laboratori Nazionali del Gran Sasso, Via G. Acitelli,22, Assergi, 76100 L’Aquila, Italy)
The 13C(a,n)16O reaction is very important in astrophysical context. This reaction is the dominant neutron source for the synthesis of the main s-process component of heavy elements in thermally pulsing, low-mass AGB stars. The stellar temperature of s process in AGB translates to a Gamow window between 140 - 230 keV, far below the Coulomb barrier.
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Various measurements of the low energy cross... -
Cabot-Ann Christofferson (South Dakota School of Mines & Technology)
The next generation low-background detectors operating deep underground aim for unprecedented low levels of radioactive backgrounds. The deposition and presence of radon progeny on detector surfaces and surrounding materials is an added source of energetic background events.
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In addition to limiting the detector material's radon exposure to reduce potential surface backgrounds, it is just as... -
CUPID-0 Collaboration
A convincing observation of neutrino-less double beta decay (0$\nu$DBD) relies on the possibility of operating high-energy resolution detectors in background-free conditions.
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Scintillating cryogenic calorimeters are one of the most promising tools to fulfill the requirements for a next-generation experiment. Several steps have been taken to demonstrate the maturity of this technique, starting... -
Dr Emilio Mendoza Cembranos (CIEMAT)
Geant4 is a software toolkit for the simulation of the passage of particles through matter. It is used very frequently in a large variety of application domains, including high energy, nuclear and accelerator physics, space science, medical physics and radiation protection. It allows to create almost arbitrary complex volumes, and to transport any particle through virtually any medium. In...
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Dr Ander Simón Estévez (Ben-Gurion University of the Negev)
The Neutrino Experiment with a Xenon TPC (NEXT) searches for the neutrinoless double beta decay of $^{136}$Xe using a high pressure xenon gas time projection chamber. This detector technology has several key advantages, including excellent energy resolution, powerful event classification based on track topology, and favorable mass scalability. The rareness of the decay demands low-background...
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Isaac Arnquist
Since its first development in the mid-1980s, inductively coupled plasma mass spectrometry (ICP-MS) quickly became the ‘gold standard’ for quantitative elemental analysis. Through iterative optimization in design, hardware, and software, ICP-MS continues to provide ever-impressive analytical figures of merit (e.g., sensitivity, resolution, etc.) and, thus, grow in new application arenas. ...
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Matthew Green (NC State University)
The LEGEND Collaboration was recently formed with the aim of combining of the successes of the GERDA Experiment and the Majorana Demonstrator with newly-developed technologies in a ton-scale, germanium-based experiment. The LEGEND Collaboration has established a phased deployment scheme: an initial 200-kg array (LEGEND-200), deployed in the repurposed GERDA cryostat and shielding...
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Prof. Mark Chen (Queen's University)
LiquidO is a new detector concept in which a diffuse scattering "liquid" scintillating medium is readout by wavelength shifting fibres. This novel technique enables powerful particle identification and strong background rejection. LiquidO has very promising sensitivity for many neutrino physics measurements that benefit from scintillator with very high loading. This is because the transparency...
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Tao Zhang (Shanghai Jiao Tong University)
The PandaX-4T dark matter experiment includes a cryostat which contains 6T xenon at -100℃. The cryostat is the major component of the detector, which is made of low background stainless steel (SS). The SS contributes about 1/3 intrinsic background of the detector. In this talk, low background SS production process, cryostat fabrication process and possibility of suppressing SS radioactivity...
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Dr Luciano Romero (Ciemat)
The DarkSide-20k (DS-20k) experiment is a 20-ton active argon detector which plans to operate radio-pure underground argon (UAr) for dark matter direct searches. A major worldwide effort is on-going in order to procure the radio-pure argon required for this experiment. The Urania project will extract and purify the UAr from the CO2 wells at the Kinder Morgan Doe Canyon Facility located in...
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Vincente Guiseppe (University of South Carolina)
The MAJORANA Collaboration is searching for neutrinoless double-beta decay in Ge-76 with an array of p-type, point-contact Ge detectors. The MAJORANA DEMONSTRATOR is comprised of 44 kg (30 kg enriched in Ge-76) of Ge detectors split between two modules contained in a low background passive and active shield at the Sanford Underground Research Facility in Lead, South Dakota. Our latest results...
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Dr Henning Back (Pacific Northwest National Laboratory)
The DarkSide-50 dark matter search experiment demonstrated that argon derived from underground can be highly reduced in $^{39}$Ar, and since then the demand for this commodity has risen. Several fundamental physics experiments need argon that is reduced in $^{39}$Ar as well as $^{42}$Ar, and there are needs in other scientific fields as well (e.g., age-dating). With the increased needs for...
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Mr Ariel Matalon (Kavli Institute for Cosmological Physics at the University of Chicago; Laboratoire de Physique Nucléaire et de Hautes Energies, Paris)
The DAMIC (Dark Matter in CCDs) experiment employs the bulk silicon of scientific-grade charge coupled devices (CCDs) to detect Dark Matter particles. DAMIC-100, a 41 g detector, is operating in the SNOLAB laboratory, located 2 km below the surface within the Vale Creighton Mine near Sudbury, Ontario, Canada. We present a powerful technique to distinguish and reject background events....
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Richard Saldanha
Long-lived radioactive isotopes produced by cosmogenic activation are a major source of background for rare event searches such as dark matter and neutrinoless double beta decay. Understanding the production rates of these cosmogenic isotopes is extremely important for determining the total allowable surface residence time of detector materials during fabrication, storage, and transportation....
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Mr Felix Ludwig (Helmholtz-Zentrum Dresden-Rossendorf)
The new shallow-underground laboratory Felsenkeller (140\,m.w.e.) in Dresden, Germany hosts a new 5\,MV underground ion accelerator in tunnels VIII and IX, as well as a low-radioactivity counting facility. For the laboratory commissioning both the muon and neutron background were measured and matched by Monte Carlo simulations.
A portable muon detector based on the close cathode chamber...
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Dr Monica Sisti (INFN Milano-Bicocca)
Neutron Activation Analysis (NAA) is a powerful technique to determine trace elements in a sample, with sensitivities which can reach parts per trillion levels and below.
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Nowadays, astroparticle physics experiments require extremely low backgrounds and their need to certify detector materials to sub-ppt concentrations of natural contaminants (40K, 238U, 232Th) is becoming a key issue. NAA... -
Prof. Vitaly Kudryavtsev (University of Sheffield)
Neutron-induced background may cause problems for many underground experiments looking for rare events. A number of computer codes are available to calculate cross-sections of (alpha,n) reactions, excitation functions and neutron yields. We have used EMPIRE2.19/3.3 and TALYS1.9 to calculate neutron production cross-sections and excitation functions, and modified SOURCES4 to evaluate neutron...
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Richard Ford (SNOLAB)
Organic Liquid Scintillator Purification
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Richard Ford (SNOLAB)
We review the methods for purification of organic liquid scintillators for large low background scintillator detectors, based mainly on the experience with the Borexino and SNO+ detectors with Pseudocumine (PC) and Linear Alkylbenzene (LAB) based scintillators. We review the purity requirements and the design basis and... -
Mr Guillaume Warot (CNRS)
The gamma spectrometry installation from Laboratoire Souterrain de Modane welcomes the largest number of low background germanium. The installation is going through a big refurbishment allowing us to welcome much more detector in a reduced space. The new organization features a common shield and an improvement of the radon protection. The design is also ready for automatization and will...
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Dr Patrick Stengel (Stockholm University)
Recently, we proposed paleo-detectors as a method for the direct detection of Weakly Interacting Massive Particle (WIMP) dark matter. In paleo-detectors, one would search for the persistent traces left by dark matter--nucleon interactions in ancient minerals. Thanks to the large integration time of paleo-detectors, relatively small target masses suffice to obtain exposures much larger than...
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Dr Moo Hyun Lee (Institute for Basic Science (IBS))
There are two major underground experiments in Korea, AMoRE and COSINE, searching for neutrinoless double beta decay and WIMP (Weakly Interacting Massive Particle) type dark matter respectively. The Advanced Molybdenum based Rare process Experiment (AMoRE) is searching for the neutrinoless double beta decay of 100Mo isotopes in molybdate crystals using high-resolution cryogenic detectors in...
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Bjoern Lehnert (Carleton University)
Radiopurity of Atmospheric Argon
Argon is commonly used in particle physics experiments due to its convenient ionization and scintillation properties. The high abundance of 1% in the earth atmosphere also makes it easy and cheap to procure in large quantities. Recently, atmospheric liquid argon (LAr) is successfully used in low background experiments as a target to detect dark matter (e.g....
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Dr Frank T. Avignone III
The elimination of radio isotopes generated by high-energy cosmic-ray neutrons from
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detector materials is critically important to achieve the maximum sensitivity in, for
example, dark matter, double-beta decay, and axion searches. A clear demonstration of
such a reduction was observed in the low-energy spectrum from the MAJORANA
DEMONSTRATOR (MJD). In particular, the beta spectrum from... -
Grzegorz Zuzel (Jagiellonian University in Krakow)
Removal of long-lived Rn-222 daughters from metal surfaces
Surface contamination with long-lived daughters of Rn-222 is of great interest for experiments looking for rare events. These include the detection of low energy solar neutrinos, searches for neutrino-less double beta decay or searches or dark matter. Decays of Pb-210, Bi-210 and
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finally Po-210 may contribute significantly to the... -
Dr Chris Jillings (SNOLAB and Laurentian University)
The DEAP-3600 Collaboration recently released results describing an ultra-low background search
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for non-baryonic dark matter at SNOLAB, reaching a sensitivity of $3.9\times 10^{-45}\;\mbox{cm}^2$
for a 100 GeV/c$^2$ WIMP mass. A background model was constructed, tuned on the sidebands,
used to inform data-selection cuts, and used to predict rates in the region of interest for
WIMP... -
Mr Mario Schwarz (Physics Department, TU Munich)
GERDA (GErmanium Detector Array) situated in the Laboratori Nazionali del Gran Sasso (LNGS) of INFN searches for the lepton-number violating neutrinoless double beta ($0\nu\beta\beta$) decay of $^{76}$Ge. Bare high-purity germanium (HPGe) detectors enriched in the double beta decay isotope $^{76}$Ge are deployed in liquid argon (LAr). Background discrimination is achieved both by analyzing the...
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Paul Scovell (STFC)
Gamma-ray spectrometry has helped form the backbone of material radio-assay for rare event searches for many years. There are a number of facilities worldwide that are leading the charge for the current generation of low-background experiments using both custom built and off the shelf high-purity germanium detectors.
R&D must begin in earnest now for the next generation of dark matter and...
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Frederic Perrot (Université de Bordeaux)
Sensitivity and advantages of laser Ablation ICPMS and comparison with other technics on several materials
Authors: F.Perrot (1), C.Cerna (1), C.Pecheyran (2)
Affiliation (1): CENBG (Centre d'Etudes Nucléaires de Bordeaux Gradignan), Université de Bordeaux, CNRS/IN2P3
Affiliation (2): Univ. Pau et des Pays de l’Adour, CNRS, LCABIE-IPREMLaser Ablation Inductive Coupled Plasma Mass...
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Dr Nasim Fatemighomi (Royal Holloway University of London)
SNO+ water purification and radium and radon assay techniques
Autor: Nasim Fatemighomi, SNOLABThe SNO+ cavity is currently filled with 7400 tonnes of ultra pure water. The water purification system was developed for the SNO experiment prior to SNO+ and is now fully recommissioned and used to refill the SNO+ cavity and acrylic vessel. The water from Creighton mine is purified by going...
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Dr Alexandre Kozlov (The University of Tokyo)
Recently, the DAMA/LIBRA collaboration confirmed observation of a modulated signal consistent with the DM hypothesis at a 13σ level. However, independent observation of the signal at another location and verification of its connection to the DM scattering off atoms are required. For that purpose, we created underground laboratory at the Kamioka mine and specialized laboratory for crystal...
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Burkhant Suerfu (Princeton University)
Status of the SABRE NaI (Tl) dark matter experiment
Burkhant Suerfu
March 2019Abstract
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SABRE is a dark matter experiment that utilizes an array of NaI (Tl) scintillating crystals. A primary goal
of the experiment is to test the DAMA/LIBRA annual modulation signal claimed to be evidence for dark matter.
The experiment features ultra-low background NaI (Tl) crystals with liquid... -
Connor Hayward (Max Planck Institute for Physics)
Studies of poly(ethylene naphthalate) for use as a structural scintillator in low background experiments
Poly(ethylene naphthalate), PEN, has been observed to scintillate in the blue wavelength region, without the need for additional materials.
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Combined with measurements of a high intrinsic radiopurity, this has sparked interest in the material for use in low-background experiments.
This... -
Maria Laura di Vacri (Pacific Northwest National Laboratory)
The intrinsic radioactive contamination of detector components and surrounding materials is typically the most relevant and limiting source of background for experiments studying rare events, such as those searching for direct evidence of dark matter or neutrinoless double beta decay. Primordial radionuclides Th-232 and U-238 and their daughters, as well as K-40 are of primary concern. Based...
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Motoyasu Ikeda (Kyoto University)
The SuperK-Gd project is a new phase of the Super-Kamiokande experiment with Gadolinium sulfate dissolved in the ultra pure water in order to enhance very significantly the ability of the detector to tag neutrons. One of main physics motivations of SK-Gd is to discover supernova relic neutrinos by using neutron tagging to minimize the otherwise overwhelming background. However an even small...
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Dr Xinran Liu (Xinran)
Next generation rare event search experiments focusing on neutrinoless double beta decay or direct dark matter detection will require ever-more stringent control of radioactive backgrounds to achieve improvements in sensitivity. A critical background arises from radon daughters plated out onto, or implanted within, detector components. The radon daughters give rise to neutron and gamma-ray...
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Dr Kazuyoshi Kobayashi (ICRR, University of Tokyo)
We have studied on surface and bulk Pb210/Po210 contamination
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on copper and PTFE using low background alpha counter. Copper and PTFE
are the material used in various low background underground experiments
such as dark matter search and neutrino double beta decay search.
It is important to know the Pb210/Po210 contamination in copper and PTFE.
At the last LRT workshop, we reported that we had... -
Olga Gileva (IBS, CUP)
The Advanced Mo based Rare process Experiment (AMoRE) searches for neutrinoless double beta decay of 100Mo in molybdate crystals, such as 40Ca100MoO4, Li2100MoO4 or Na2100Mo2O7. For such a rare event search experiment, the techniques which allow investigation and reduction of radioactive background are extremally crucial. The first step in developing highly radiopure scintillating crystals is...
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Szymon Manecki
Tellurium Purification and Deployment in SNO+
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SNO+ will be an organic liquid scintillator-based experiment located 2km underground at
SNOLAB, CANADA. The primary goal of the experiment is to search for neutrinoless double beta
decay by dissolving an isotope of tellurium-130 in the scintillator.
Natural tellurium will be purified underground in a form of telluric acid, and then... -
Pia Loaiza (Laboratoire del'Accélerateur Linéaire CNRS/IN2P3 Université Paris-Saclay)
The ANDES (Agua Negra Deep Experiment Site) project aims at the construction of an underground laboratory between Argentina and Chili, taking advantage of the construction of the Agua Negra Tunnel between the two countries. After a pre-feasibility study in 2005, the final project for the construction of the road tunnel was approved and the international tender started in 2013.
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The ANDES... -
Prof. Yue Meng (Shanghai Jiao Tong University)
The PandaX-4T dark matter experiment will utilize a two-phase liquid/gas xenon time projection chamber containing 4 tonnes of liquid xenon. The PandaX-4T detector will be located at the Jinping Underground laboratory with 2400m overburden in Sichuan, China. Multiple low background techniques are used to assay and screen materials and parts to control the intrinsic/surface backgrounds. Also...
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Mr Diego Ramírez García (Albert-Ludwigs-Universität Freiburg)
GeMSE (Germanium Material and Meteorite Screening Experiment) is a large-volume gamma-ray spectrometer devoted to the screening of meteorite samples and the selection of materials for rare-event search experiments. Located underground at 620 m.w.e. and featuring a multi-layer shielding, its current background level is below 240 counts/day in the 100 - 2700 keV range.
GeMSE is an ideal...
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Stefano Nisi (INFN - National Institute for Nuclear Physics)
The most modern mechanical technologies and cutting edge radio-analytical techniques merged for extremely low background achievement
S.Nisi1, D. Orlandi1
1National Institute of Nuclear Physics, Gran Sasso National Laboratory, 67100 Assergi (AQ), ItalyThe sensitivity of the experiments, searching for rare and low energy processes which could explain the most fascinating open questions...
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Andreas Piepke (University of Alabama)
The nEXO Background Control Program
A. Piepke (for the nEXO Collaboration)
University of AlabamanEXO is a planned next generation double beta decay search, envisaged to utilize 5 tonnes of isotopically enriched xenon. Low energy rare event searches like this require ultra-low background rates to be scientifically successful. The nEXO collaboration has set up a vigorous background...
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Jaret Heise (SURF)
THE SANFORD UNDERGROUND RESEARCH FACILITY
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J. Heise
Sanford Underground Research Facility
Lead, SD 57754
Corresponding author email: jaret@sanfordlab.org
ABSTRACT
Building on rich legacies in both mining and transformational physics
research, the Sanford Underground Research Facility (SURF) has been operating
for over a decade as a facility dedicated to supporting underground research... -
Eric Miller (South Dakota School of Mines)
LZ will use a 10 ton dual-phase xenon Time Projection Chamber (TPC) to search for WIMP dark matter via direct detection. In order to achieve its radiopurity goals LZ, like other low-background detectors with noble element targets, faces the challenge of removing radioactive noble gases including Rn-222, Kr-85, and Ar-39. This talk will survey strategies used by various experiments to purify...
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Mr Patrick Knights (University of Birmingham)
Rare event detection experiments, such as direct dark matter and neutrino-less double beta decay searches, pose stringent limits on the experimental backgrounds in order to achieve the required sensitivities to discover new physics. The backgrounds introduced by radioisotopes in the detector construction materials must be carefully considered. Thanks to having no long-lived radioisotopes and...
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Dr Hardy Simgen (Max-Planck-Institut für Kernphysik)
In the last years, liquid xenon detectors became very popular in the field of low energy rare-event search. With the increasing size of the detectors, external radiation is no longer the dominant background source in the latest generation of experiments. Instead, the achievable radio-purity is limited by internal contamination due to radioactive noble gas impurities, in particular 85Kr and...
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Alessandro Manfredini (University of Zurich)
The XENON1T detector is a dual-phase time projection chamber devoted to dark matter searches through their scattering off xenon atoms in a 2 tonne liquid xenon target. The background rate in the central volume of the XENON1T detector is the lowest achieved so far with a liquid xenon-based direct detection experiment. In this talk I describe the response model of the detector, the challenges of...
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