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10/07/2019, 09:00
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Dir Sezione INFN, Dir dip Fisica10/07/2019, 10:00
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Cirelli Marco10/07/2019, 10:15
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Sven Vahsen (University of Hawaii)10/07/2019, 11:30
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Giovanni De Lellis (NA)10/07/2019, 12:15
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Kentaro Miuchi (Kobe University)10/07/2019, 14:30
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Elisabetta Baracchini (GSGC)10/07/2019, 15:00
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Charling Tao10/07/2019, 15:30
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Hiroyuki Sekiya (Kamioka Obs., ICRR, The Univ. of Tokyo)10/07/2019, 16:20
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Alessandro Di Marco (Università di Roma Tor Vergata)10/07/2019, 16:50
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Luciano Pandola (LNS)10/07/2019, 17:20
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Kiseki Nakamura (Kobe University)10/07/2019, 17:50
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C. O'Hare11/07/2019, 09:00
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Elliott Reid (IPPP, Durham University)11/07/2019, 09:30
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María Benito11/07/2019, 10:00
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William DeRocco11/07/2019, 10:30
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Angelo Esposito (EPFL)11/07/2019, 11:30
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Francesco Pandolfi (ROMA1)11/07/2019, 12:00
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F. Ripanti11/07/2019, 12:30
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Mason Marshall (Harvard-Smithsonian Center for Astrophysics)11/07/2019, 14:30
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Ryuta Kobayashi (Nagoya University)11/07/2019, 15:00
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Igor Abritta Costa (Istituto Nazionale di Fisica Nucleare)11/07/2019, 15:30
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Kentaro Miuchi (Kobe University)11/07/2019, 16:00
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Francesco Renga (ROMA1)11/07/2019, 16:30
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Giovanni Mazzitelli (LNF)11/07/2019, 17:30
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R. Gregorio11/07/2019, 18:00
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Davide Piccolo (LNF), Luigi Benussi (LNF)11/07/2019, 18:30
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Neil Spooner (University of Sheffield)12/07/2019, 09:30
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Callum Eldridge (University of Sheffield)12/07/2019, 10:00
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Thomas Thorpe (GSSI)12/07/2019, 10:30
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Takashi Asada (LNGS)12/07/2019, 11:30
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Giuliana Fiorillo (NA)12/07/2019, 12:00
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We present progress on development of a new low background charge readout plane for use in directional dark matter detectors based on low pressure SF-6 negative ion gas. This form of readout aims to provide the advantages of thick Gas Electron Multipliers as a means to producing high avalanche gain, with a simple wire readout that can provide low noise operation. Results are presented for...
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We employ the recently developed effective theories for superfluids to describe the interaction between the helium-4 phonon and a dark matter particle. In this language we compute the rate and differential distributions for the process of emission of one or two phonons by the passing dark matter. Such information are key to the possible design of new detectors to search for sub-GeV dark matter...
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NEWSdm experiment is a directional dark matter search experiment with super fine grained emulsion called NIT. The experiment aim to detect the direction of dark matter signal by recording sub-$\mu$m scale tracks of recoiled nucleus by dark matter with NIT.However, to get track information, we need not only to record tracks but also to readout them.Therefore, tracks in NIT is need to readout...
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ZnWO4 crystal was reported that the scintillation light output has the direction dependence on the crystal orientation. Thus we are developing a direction sensitive dark matter detector utilizing the anisotropic response of ZnWO4 crystal.
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In this talk, we will present results of the measurement of the quenching factor and anisotropic response of the ZnWO4 crystal for mono-energetic neutron... -
Directional detection of Dark Matter particles (DM) could be accomplished by studying either ion or electron recoils in large arrays of parallel carbon nanotubes. For instance, a MeV mass DM particle could scatter off a lattice electron, resulting in the transfer of sufficient energy to eject the electron from the nanotube surface. The electron can eventually be detected whenever an external...
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Callum Eldridge (University of Sheffield)
The MM-THGem is an amplification device analogous to a ThGem which uses meshes to shape the electric field within the holes. It is hoped this device can reduce the instability and tendency to spark seen in conventional thick gems. Results from runs with $^{55}$Fe and $\alpha$ sources in low pressure SF$_6$ are presented.
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Kiseki Nakamura (Kobe University)
Columnar recombination is a phenomenon that recombination is promoted when a direction of electric field and that of an ionizing particle track are aligned.
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If this phenomenon occurs for low energy nuclear track, direction-sensitive dark matter search with large target mass and spin-independent sensitivity can be realized.
We report on the measurement of columnar recombination in a high... -
Gas study on SF6 will be reviewed.
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An update is presented of recent CYGNUS TPC collaboration activities. The CYGNUS concept here is to establish a world-wide array of gas TPCs ultimately capable of searching for WIMP dark matter with nuclear recoil directionality and hence reach below the so-called neutrinos floor. Such technology also has the potential to perform recoil discrimination in the low energy regime below ~10 keV...
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I will summarize the work that has been done at the University of Hawaii over the past few years with small gas TPCs exploiting high definition HD pixel charge readout. Our first WIMP-nucleon scattering limit, obtained during a surface run of eight small TPCs optimized for directional neutron detection, will be presented and the implications discussed. Future plans will also be discussed as...
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Elliott Reid (IPPP, Durham University)
As the sensitivities of dark matter direct detection experiments improve, they will soon encounter a new source of background, due to coherent elastic neutrino-nucleus scattering (CEvNS). In this talk, I will discuss how the CEvNS rate could vary in certain simplified models of new physics, raising the level of the so-called neutrino floor. I will discuss current constraints on these models,...
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Latest results on NEWAGE and status of the CYGNUS-KM will be presented.
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María Benito
The interpretation of results from in/direct dark matter (DM) searches depend on the adopted DM distribution within the target. In particular, the reconstruction of the DM profile in the Milky Way proceeds from astrophysical observations, all affected by quantifiable uncertainties. I will show how with a full data-driven analysis, actual uncertainties on the relevant astrophysical observations...
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We report on the polarization analysis of the Raman spectrum of highly aligned multi-wall carbon nanotubes (MWCNTs). A simple model considering the average angle distribution across the MWCNT axes accounts for the observed angular dependent Raman mode intensity. The model results fully fit the experimental data, allowing to derive an average waving angle of about 37° around the MWCNT axes, and...
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The Recoil Directionality project (ReD) aims to characterize the light and charge response of a liquid argon (LAr) dual-phase Time Projection Chamber (TPC) to neutron-induced nuclear recoils. The main goal of the project is to probe for the possible directional dependence suggested by the SCENE experiment. Furthermore, ReD will have the possibility to study the response of a LAr TPC to very...
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I’ll give a review of the CYGNUS proto-collaboration gas TPC effort. The CYGNUS concept here is to establish a world-wide array of gas TPCs ultimately capable of searching for WIMP dark matter with nuclear recoil directionality and hence reach below the so-called neutrino floor. Such technology also has the potential to distinguish nuclear recoils from electron recoils even in the low energy...
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CYGNO experiment is working at the construction of 1 cubic meter TPC, based on Optical Readout of Gas Electron Multipliers (GEMs) for Directional Dark Matter search. This kind of research demands for very long data-acquisition runs and thus for a high operation stability and reliability. A 7 litre sensitive volume prototype was kept for 10 days in the working conditions, while its response to...
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Authors:
Davide Pinci, Igor Abritta Costa, Alice Apponi, Elisabetta Baracchini, Fabio Bellini, Stefano Bianco, Luigi Benussi, Gianluca Cavoto, Emanuele Di Marco, Giulia D'Imperio, Giovanni Maccarrone, Michela Marafini, Giovanni Mazzitelli, Andrea Messina, Luciano Passamonti, Davide Piccolo, Francesca Pucci, Francesco Renga, Filippo Rosatelli, Giuseppe Rossi, Sandro TomassiniAbstract
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Modern... -
The CYGNO experiment is a 1~m$^3$ gas TPC for directional dark matter searches, as a prototype toward the 100-1000~m$^3$ CYGNUS network of underground experiments. In such a TPC, electrons produced by dark-matter-induced nuclear recoils will drift toward and will be multiplied by a three-layer GEM structure, and the light produced in the avalanche processes will be readout by
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sCMOS cameras,... -
G. Mazzitelli on behalf of CYGNO/INITIUM collaboration
The design of the CYGNO/INITIUM project, aimed to prove the capability of a high resolution gaseous TPC with sCMOS (scientific CMOS) optical readout for near future directional Dark Matter searches, is under development and a Technical Design Report is foreseen by the end of the year. The status of the design, progress and open issues are...
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Takashi Asada (LNGS)
The NEWSdm experiment uses fine-grained nuclear emulsion as a tracking detector with superior spatial resolution.
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Background rejection is a common problem for dark matter search experiment towards their scale-up. Serious backgrounds in the nuclear emulsion are fake physical signals, represented by contaminated dust.
We constructed a new facility at the LNGS. It is world-first underground... -
Dr Mason Marshall (Harvard-Smithsonian Center for Astrophysics)
We propose a method to identify weakly interacting massive particle (WIMP) dark matter via induced nuclear recoil in diamond. This 100 nm damage cluster induces stress in the crystal, shifting the energy levels of nearby quantum defects. Crucially, the direction of the track left by the recoil allows us to determine the incoming direction of the particle enabling the possibility of...
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The gas SF$_6$ has become of interest as a negative ion drift gas for use in directional dark matter searches. However, as for other targets in such searches, it is important that contamination can be removed, because problems with signal detection can arise from contaminants such as radon and impurities. Radon contamination can produce unwanted background events, and impurities such as water...
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Dr Alessandro Di Marco (INFN Roma Tor Vergata)
Low-background anisotropic scintillators can be reliable detectors to investigate - through the directionality technique - those Dark Matter (DM) candidates inducing just nuclear recoils.
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The directionality technique for such a kind of candidates is based on the study of the correlation between the nuclear recoils direction and the Earth motion in the galactic rest frame. In an anisotropic...
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