18 research outputs found
Tuberculosis Hospital in Aguas de Busot : a personal experience
El artículo trata tanto de un análisis sobre un
lugar concreto, con gran bagaje histórico,
como una reflexión sobre la evolución de la
profesión enfermera. Un ánimo al estudio y cuidado
de nuestro pasado, para mejorar el presente y
crear un futuro mejor.A special site with an important historical
background is analised, considered here as
a reflection of the evolution of the nursing
profession with the aim of studying and caring for
our past, to improve our present and to create a better
future
A CUPID Li2100MoO4scintillating bolometer tested in the CROSS underground facility
A scintillating bolometer based on a large cubic Li2100MoO4 crystal (45 mm side) and a Ge wafer (scintillation detector) has been operated in the CROSS cryogenic facility at the Canfranc underground laboratory in Spain. The dual-readout detector is a prototype of the technology that will be used in the next-generation 0¿2ß experiment CUPID . The measurements were performed at 18 and 12 mK temperature in a pulse tube dilution refrigerator. This setup utilizes the same technology as the CUORE cryostat that will host CUPID and so represents an accurate estimation of the expected performance. The Li2100MoO4 bolometer shows a high energy resolution of 6 keV FWHM at the 2615 keV ¿ line. The detection of scintillation light for each event triggered by the Li2100MoO4 bolometer allowed for a full separation (~8s) between ¿(ß) and a events above 2 MeV . The Li2100MoO4 crystal also shows a high internal radiopurity with 228Th and 226Ra activities of less than 3 and 8 µBq/kg, respectively. Taking also into account the advantage of a more compact and massive detector array, which can be made of cubic-shaped crystals (compared to the cylindrical ones), this test demonstrates the great potential of cubic Li2100MoO4 scintillating bolometers for high-sensitivity searches for the 100Mo 0¿2ß decay in CROSS and CUPID projects
Design and construction of a new detector to measure ultra-low radioactive-isotope contamination of argon
Large liquid argon detectors offer one of the best avenues for the detection of galactic weakly interacting massive particles (WIMPs) via their scattering on atomic nuclei. The liquid argon target allows exquisite discrimination between nuclear and electron recoil signals via pulse-shape discrimination of the scintillation signals. Atmospheric argon (AAr), however, has a naturally occurring radioactive isotope, 39Ar, a β emitter of cosmogenic origin. For large detectors, the atmospheric 39Ar activity poses pile-up concerns. The use of argon extracted from underground wells, deprived of 39Ar, is key to the physics potential of these experiments. The DarkSide-20k dark matter search experiment will operate a dual-phase time projection chamber with 50 tonnes of radio-pure underground argon (UAr), that was shown to be depleted of 39Ar with respect to AAr by a factor larger than 1400. Assessing the 39Ar content of the UAr during extraction is crucial for the success of DarkSide-20k, as well as for future experiments of the Global Argon Dark Matter Collaboration (GADMC). This will be carried out by the DArT in ArDM experiment, a small chamber made with extremely radio-pure materials that will be placed at the centre of the ArDM detector, in the Canfranc Underground Laboratory (LSC) in Spain. The ArDM LAr volume acts as an active veto for background radioactivity, mostly γ-rays from the ArDM detector materials and the surrounding rock. This article describes the DArT in ArDM project, including the chamber design and construction, and reviews the background required to achieve the expected performance of the detector
Recommended from our members
Cryogenic Characterization of FBK RGB-HD SiPMs
We report on the cryogenic characterization of Red Green Blue - High Density
(RGB-HD) SiPMs developed at Fondazione Bruno Kessler (FBK) as part of the
DarkSide program of dark matter searches with liquid argon time projection
chambers. A dedicated setup was used to measure the primary dark noise, the
correlated noise, and the gain of the SiPMs at varying temperatures. A
custom-made data acquisition system and analysis software were used to
precisely characterize these parameters. We demonstrate that FBK RGB-HD SiPMs
with low quenching resistance (RGB-HD-LR) can be operated from 40 K to 300
K with gains in the range to and noise rates on the order of a
few Hz/mm
Recommended from our members
A CUPID (Li2MoO4)-Mo-100 scintillating bolometer tested in the CROSS underground facility
A scintillating bolometer based on a large cubic LiMoO
crystal (45 mm side) and a Ge wafer (scintillation detector) has been operated
in the CROSS cryogenic facility at the Canfranc underground laboratory in
Spain. The dual-readout detector is a prototype of the technology that will be
used in the next-generation experiment CUPID. The measurements
were performed at 18 and 12 mK temperature in a pulse tube dilution
refrigerator. This setup utilizes the same technology as the CUORE cryostat
that will host CUPID and so represents an accurate estimation of the expected
performance. The LiMoO bolometer shows a high energy
resolution of 6 keV FWHM at the 2615 keV line. The detection of
scintillation light for each event triggered by the LiMoO
bolometer allowed for a full separation (8) between
() and events above 2 MeV. The LiMoO
crystal also shows a high internal radiopurity with Th and Ra
activities of less than 3 and 8 Bq/kg, respectively. Taking also into
account the advantage of a more compact and massive detector array, which can
be made of cubic-shaped crystals (compared to the cylindrical ones), this test
demonstrates the great potential of cubic LiMoO scintillating
bolometers for high-sensitivity searches for the Mo decay
in CROSS and CUPID projects
Recommended from our members
A CUPID Li2100MoO4scintillating bolometer tested in the CROSS underground facility
A scintillating bolometer based on a large cubic Li2100MoO4 crystal (45 mm side) and a Ge wafer (scintillation detector) has been operated in the CROSS cryogenic facility at the Canfranc underground laboratory in Spain. The dual-readout detector is a prototype of the technology that will be used in the next-generation 0ν2β experiment CUPID . The measurements were performed at 18 and 12 mK temperature in a pulse tube dilution refrigerator. This setup utilizes the same technology as the CUORE cryostat that will host CUPID and so represents an accurate estimation of the expected performance. The Li2100MoO4 bolometer shows a high energy resolution of 6 keV FWHM at the 2615 keV γ line. The detection of scintillation light for each event triggered by the Li2100MoO4 bolometer allowed for a full separation (∼8σ) between γ(β) and α events above 2 MeV . The Li2100MoO4 crystal also shows a high internal radiopurity with 228Th and 226Ra activities of less than 3 and 8 μBq/kg, respectively. Taking also into account the advantage of a more compact and massive detector array, which can be made of cubic-shaped crystals (compared to the cylindrical ones), this test demonstrates the great potential of cubic Li2100MoO4 scintillating bolometers for high-sensitivity searches for the 100Mo 0ν2β decay in CROSS and CUPID projects
Recommended from our members
A CUPID Li2100MoO4scintillating bolometer tested in the CROSS underground facility
A scintillating bolometer based on a large cubic Li2100MoO4 crystal (45 mm side) and a Ge wafer (scintillation detector) has been operated in the CROSS cryogenic facility at the Canfranc underground laboratory in Spain. The dual-readout detector is a prototype of the technology that will be used in the next-generation 0ν2β experiment CUPID . The measurements were performed at 18 and 12 mK temperature in a pulse tube dilution refrigerator. This setup utilizes the same technology as the CUORE cryostat that will host CUPID and so represents an accurate estimation of the expected performance. The Li2100MoO4 bolometer shows a high energy resolution of 6 keV FWHM at the 2615 keV γ line. The detection of scintillation light for each event triggered by the Li2100MoO4 bolometer allowed for a full separation (∼8σ) between γ(β) and α events above 2 MeV . The Li2100MoO4 crystal also shows a high internal radiopurity with 228Th and 226Ra activities of less than 3 and 8 μBq/kg, respectively. Taking also into account the advantage of a more compact and massive detector array, which can be made of cubic-shaped crystals (compared to the cylindrical ones), this test demonstrates the great potential of cubic Li2100MoO4 scintillating bolometers for high-sensitivity searches for the 100Mo 0ν2β decay in CROSS and CUPID projects
The DarkSide physics program and its recent results
DarkSide (DS) at Gran Sasso underground laboratory is a direct Dark Matter search program based on Time Projection Chambers (TPC) with liquid Argon from underground sources. The DarkSide-50 (DS-50) TPC, with 150 kg of Argon is installed inside active neutron and muon detectors. DS-50 has been taking data since November 2013 with Atmospheric Argon (AAr) and since April 2015 with Underground Argon (UAr), depleted in radioactive 39 Ar by a factor similar to 1400. The exposure of 1422 kg d of AAr has demonstrated that the operation of DS-50 for three years in a background free condition is a solid reality, thanks to the superb performance of the Pulse Shape Analysis. The first release of results from an exposure of 2616 kg d of UAr has shown no candidate Dark Matter events. We have set the best limit for Spin-Independent elastic nuclear scattering of WIMPs obtained by Argon-based detectors, corresponding to a cross-section of 2 10(-44) cm(2) at a WIMP mass of 100 GeV. We present the detector design and performance, the results from the AAr run and the first results from the UAr run and we briefly introduce the future of the DarkSide program