Papers by Antonio D'Addabbo
SciPost Physics Proceedings
The CRESST-III experiment aims at the direct detection of dark matter particles via their elastic... more The CRESST-III experiment aims at the direct detection of dark matter particles via their elastic scattering off nuclei in a scintillating CaWO_44 target crystal. For many years CaWO_44 crystals have successfully been produced in-house at Technische Universität München with a focus on high radiopurity. To further improve the CaWO_44 crystals, an extensive chemical purification of the raw materials has been performed and the crystal TUM93 was produced from this powder. We present results from an \alphaα-decay rate analysis performed on 344 days of data collected in the ongoing CRESST-III data-taking campaign. The \alphaα-decay rate could significantly be reduced.
SciPost Physics Proceedings
The CRESST experiment observes an unexplained excess of events at low energies. In the current CR... more The CRESST experiment observes an unexplained excess of events at low energies. In the current CRESST-III data-taking campaign we are operating detector modules with different designs to narrow down the possible explanations. In this work, we show first observations of the ongoing measurement, focusing on the comparison of time, energy and temperature dependence of the excess in several detectors. These exclude dark matter, radioactive backgrounds and intrinsic sources related to the crystal bulk as a major contribution.
Journal of Physics: Conference Series
CUPID-0 is an array of 24 Zn 82 Se scintillating bolometers used to search for the 0νββ decay of ... more CUPID-0 is an array of 24 Zn 82 Se scintillating bolometers used to search for the 0νββ decay of 82 Se. It is the first large mass 0νββ experiment exploiting a double read-out technique: the phonon signal to accurately measure particle energies and the light signal to reject the α-induced background. Its success might open the road to a next generation project of ton mass scale, CUPID. The array is in operation at Laboratori Nazionali del Gran Sasso since the beginning of 2017, in this paper we present the preliminary results obtained with an exposure of 10.45 kg• y.
SciPost Physics Proceedings
Many low-threshold experiments observe sharply rising event rates of yet unknown origins below a ... more Many low-threshold experiments observe sharply rising event rates of yet unknown origins below a few hundred eV, and larger than expected from known backgrounds. Due to the significant impact of this excess on the dark matter or neutrino sensitivity of these experiments, a collective effort has been started to share the knowledge about the individual observations. For this, the EXCESS Workshop was initiated. In its first iteration in June 2021, ten rare event search collaborations contributed to this initiative via talks and discussions. The contributing collaborations were CONNIE, CRESST, DAMIC, EDELWEISS, MINER, NEWS-G, NUCLEUS, RICOCHET, SENSEI and SuperCDMS. They presented data about their observed energy spectra and known backgrounds together with details about the respective measurements. In this paper, we summarize the presented information and give a comprehensive overview of the similarities and differences between the distinct measurements. The provided data is furthermore...
arXiv (Cornell University), Apr 8, 2013
The New IRAM KIDs Array (NIKA) is a pathfinder instrument devoted to millimetric astronomy. In 20... more The New IRAM KIDs Array (NIKA) is a pathfinder instrument devoted to millimetric astronomy. In 2009 it was the first multiplexed KID camera on the sky; currently it is installed at the focal plane of the IRAM 30-meters telescope at Pico Veleta (Spain). We present preliminary data from the last observational run and the ongoing developments devoted to the next NIKA-2 kilopixels camera, to be commissioned in 2015. We also report on the latest laboratory measurements, and recent improvements in detector cosmetics and read-out electronics. Furthermore, we describe a new acquisition strategy allowing us to improve the photometric accuracy, and the related automatic tuning procedure.
Springer Proceedings in Physics, 2018
The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment ... more The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment reaching the 1-ton scale. The detector consists of an array of 988 TeO 2 crystals arranged in 19 towers. The construction of the experiment and the installation of the detector was completed in August 2016. In this paper, the technical challenges of the construction, the design choices and measured performance of the electronic instrumentation are presented.
OLIMPO: A 4-bands imaging spectro-photometer for balloon-borne observations of the Sunyaev-Zel'dovich effect
Physical Review Letters, 2021
Journal of Physics: Conference Series, 2020
CUORE is a cryogenic experiment that focuses on the search of neutrinoless double beta decay in 1... more CUORE is a cryogenic experiment that focuses on the search of neutrinoless double beta decay in 130Te and it is located at the Gran Sasso National Laboratories. Its detector consists of 988 TeO2 crystals operating at a base temperature of ∼10 mK. It is the first ton-scale bolometric experiment ever realized for this purpose. Thanks to its large target mass and ultra-low background, the CUORE detector is also suitable for the search of other rare phenomena. In particular the low energy part of the spectra is interesting for the detection of WIMP-nuclei scattering reactions. One of the most important requirements to perform these studies is represented by the achievement of a stable energy threshold lower than 10 keV. Here, the CUORE capability to accomplish this purpose using a low energy software trigger will be presented and described.
Physical Review Letters, 2020
We report new results from the search for neutrinoless double-beta decay in 130 Te with the CUORE... more We report new results from the search for neutrinoless double-beta decay in 130 Te with the CUORE detector. This search benefits from a four-fold increase in exposure, lower trigger thresholds and analysis improvements relative to our previous results. We observe a background of (1.38 ± 0.07) • 10 −2 counts/(keV•kg•yr) in the 0νββ decay region of interest and, with a total exposure of 372.5 kg•yr, we attain a median exclusion sensitivity of 1.7 • 10 25 yr. We find no evidence for 0νββ
Journal of Physics: Conference Series, 2020
CUORE (Cryogenic Underground Observatory for Rare Events) is a ton-scale experiment aiming to the... more CUORE (Cryogenic Underground Observatory for Rare Events) is a ton-scale experiment aiming to the search of neutrino-less double beta decay in 130Te with a projected sensitivity on the Majorana effective mass close to the inverted hierarchy region. The CUORE detector consists of a segmented array of 988 TeO2 bolometers, organized in 19 towers and operated at a temperature of about 10 mK thanks to a custom cryogenic system which, besides the uncommon scale, observes several constraints from the radio-purity of the materials to the mechanical decoupling of the cooling systems. The successful commissioning of the CUORE cryogenic system has been completed early in 2016 and represents an outstanding achievement by itself. The installation of the detector proceeded along 2016 followed by the cooldown to base temperature at the beginning of 2017. The CUORE detector is now operational and has been taking science data since Spring 2017. With the first ~3 weeks of collected data, we present h...
Journal of Physics: Conference Series, 2020
CUORE, the Cryogenic Underground Observatory for Rare Events, is an experiment searching for the ... more CUORE, the Cryogenic Underground Observatory for Rare Events, is an experiment searching for the neutrinoless double-beta decay of 130 Te. The first CUORE dataset was acquired in May and June 2017 and consisted of 10.6 kg•yr of TeO2 exposure, with several days of calibration data before and after the physics dataset. We discuss here the initial performance of the CUORE detector and cryostat in this first dataset.
Proceedings of XVII International Workshop on Neutrino Telescopes — PoS(NEUTEL2017), 2018
Physical review letters, Jan 30, 2018
The CUORE experiment, a ton-scale cryogenic bolometer array, recently began operation at the Labo... more The CUORE experiment, a ton-scale cryogenic bolometer array, recently began operation at the Laboratori Nazionali del Gran Sasso in Italy. The array represents a significant advancement in this technology, and in this work we apply it for the first time to a high-sensitivity search for a lepton-number-violating process: ^{130}Te neutrinoless double-beta decay. Examining a total TeO_{2} exposure of 86.3 kg yr, characterized by an effective energy resolution of (7.7±0.5) keV FWHM and a background in the region of interest of (0.014±0.002) counts/(keV kg yr), we find no evidence for neutrinoless double-beta decay. Including systematic uncertainties, we place a lower limit on the decay half-life of T_{1/2}^{0ν}(^{130}Te)>1.3×10^{25} yr (90% C.L.); the median statistical sensitivity of this search is 7.0×10^{24} yr. Combining this result with those of two earlier experiments, Cuoricino and CUORE-0, we find T_{1/2}^{0ν}(^{130}Te)>1.5×10^{25} yr (90% C.L.), which is the most str...
Astronomy & Astrophysics, 2017
The determination of the thermodynamic properties of clusters of galaxies at intermediate and hig... more The determination of the thermodynamic properties of clusters of galaxies at intermediate and high redshift can bring new insights into the formation of large-scale structures. It is essential for a robust calibration of the mass-observable scaling relations and their scatter, which are key ingredients for precise cosmology using cluster statistics. Here we illustrate an application of high resolution (<20 arcsec) thermal Sunyaev-Zel'dovich (tSZ) observations by probing the intracluster medium (ICM) of the Planck-discovered galaxy cluster PSZ1 G045.85+57.71 at redshift z = 0.61, using tSZ data obtained with the NIKA camera, which is a dual-band (150 and 260 GHz) instrument operated at the IRAM 30-m telescope. We deproject jointly NIKA and Planck data to extract the electronic pressure distribution from the cluster core (R ∼ 0.02 R 500) to its outskirts (R ∼ 3 R 500) non-parametrically for the first time at intermediate redshift. The constraints on the resulting pressure profile allow us to reduce the relative uncertainty on the integrated Compton parameter by a factor of two compared to the Planck value. Combining the tSZ data and the deprojected electronic density profile from XMM-Newton allows us to undertake a hydrostatic mass analysis, for which we study the impact of a spherical model assumption on the total mass estimate. We also investigate the radial temperature and entropy distributions. These data indicate that PSZ1 G045.85+57.71 is a massive (M 500 ∼ 5.5 × 10 14 M) cool-core cluster. This work is part of a pilot study aiming at optimizing the treatment of the NIKA2 tSZ large program dedicated to the follow-up of SZ-discovered clusters at intermediate and high redshifts. This study illustrates the potential of NIKA2 to put constraints on the thermodynamic properties and tSZ-scaling relations of these clusters, and demonstrates the excellent synergy between tSZ and X-ray observations of similar angular resolution.
Journal of Low Temperature Physics, 2015
The Cryogenic Underground Observatory for Rare Events (CUORE) is a 1-ton scale bolometric experim... more The Cryogenic Underground Observatory for Rare Events (CUORE) is a 1-ton scale bolometric experiment whose detector consists of an array of 988 TeO 2 crystals arranged in a cylindrical compact structure of 19 towers. This will be the largest bolometric mass ever operated. The experiment will work at a temperature around or below 10 mK. CUORE cryostat consists of a cryogen-free system based on Pulse Tubes and a custom high power Dilution Refrigerator, designed to match these specifications. The cryostat has been commissioned in 2014 at the Gran Sasso National Laboratories (LNGS) and reached a record temperature of 6 mK on a cubic meter scale. In this paper we present results of CUORE commissioning runs. Details on the thermal characteristics and cryogenic performances of the system will be also given.
Lumped element kinetic inductance detectors for far-infrared astronomy
SPIE Proceedings, 2008
We describe a new type of FIR detector based on lumped element superconducting resonators (LEKIDs... more We describe a new type of FIR detector based on lumped element superconducting resonators (LEKIDs). These devices can act as distributed FIR radiation absorbers without the need for an additional coupling structure. In addition, these devices can be integrated into a compact ...
Nuclear Physics A, 2010
Using 9.4 g of 96 Zr isotope and 1221 days of data from the NEMO-3 detector corresponding to 0.03... more Using 9.4 g of 96 Zr isotope and 1221 days of data from the NEMO-3 detector corresponding to 0.031 kg•y, the obtained 2νββ decay half-life measurement is T 2ν 1/2 = [2.35 ± 0.14(stat) ± 0.16(syst)] × 10 19 yr. Different characteristics of the final state electrons have been studied, such as the energy sum, individual electron energy, and angular distribution. The 2ν nuclear matrix element is extracted using the measured 2νββ half-life and is M 2ν = 0.049 ± 0.002. Constraints on 0νββ decay have also been set.
Journal of Low Temperature Physics, 2014
We are studying the properties of Niobium Silicon amorphous alloys as a candidate material for th... more We are studying the properties of Niobium Silicon amorphous alloys as a candidate material for the fabrication of highly sensitive Kinetic Inductance Detectors (KID), optimized for very low optical loads. As in the case of other composite materials, the NbSi properties can be changed by varying the relative amounts of its components. Using a NbSi film with T c ≈ 1 K we have been able to obtain the first NbSi resonators, observe an optical response and acquire a spectrum in the band 50 to 300 GHz. The data taken show that this material has very high kinetic inductance L k and normal state surface resistivity ρ n. These properties are ideal for the development of KID. More measurements are planned to further characterize the NbSi alloy and fully investigate its potential.
Development of Kinetic Inductance Detectors for Cosmic Microwave Background experiments
Experimental Astronomy, 2010
... Development of Kinetic Inductance Detectors for Cosmic Microwave Background experiments Marti... more ... Development of Kinetic Inductance Detectors for Cosmic Microwave Background experiments Martino Calvo · Claudia Giordano · Roberto Battiston · Paolo de Bernardis · Benno Margesin · Silvia Masi · Alessandro Monfardini ...
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Papers by Antonio D'Addabbo