DSpace Collection:
https://hdl.handle.net/10316/79854
2024-03-29T02:22:45ZReflectance and fluorescence characteristics of PTFE coated with TPB at visible, UV, and VUV as a function of thickness
https://hdl.handle.net/10316/113936
Title: Reflectance and fluorescence characteristics of PTFE coated with TPB at visible, UV, and VUV as a function of thickness
Authors: Haefner, J.; Fahs, A.; Ho, J.; Stanford, C.; Guenette, R.; Adams, C.; Almazán, H.; Álvarez, V.; Aparicio, B.; Aranburu, A.I.; Arazi, L.; Arnquist, I.J.; Auria-Luna, F.; Ayet, S.; Azevedo, C.D.R.; Bailey, K.; Ballester, F.; Benlloch-Rodríguez, J.M.; Borges, F. I. G. M.; Bounasser, S.; Byrnes, N.; Cárcel, S.; Carrión, J.V.; Cebrián, S.; Church, E.; Conde, C. A. N.; Contreras, T.; Cossío, F.P.; Denisenko, A.A.; Dey, E.; Díaz, G.; Dickel, T.; Escada, J.; Esteve, R.; Felkai, R.; Fernandes, L. M. P.; Ferrario, P.; Ferreira, A. L.; Foss, F.W.; Freitas, E. D. C.; Freixa, Z.; Generowicz, J.; Goldschmidt, A.; Gomez-Cadenas, J. J.; González, R.; Grocott, J.; Hafidi, K.; Hauptman, J.; Henriques, C. A. O.; Hernando Morata, J.A.; Herrero-Gómez, P.; Herrero, V.; Ho, P.; Ifergan, Y.; Jones, B.J.P.; Kekic, M.; Labarga, L.; Larizgoitia, L.; Lebrun, P.; Lopez Gutierrez, D.; López-March, N.; Madigan, R.; Mano, R.D.P.; Martín-Albo, J.; Martínez-Lema, G.; Martínez-Vara, M.; Marques, A. P.; Meziani, Z.E.; Miller, R.; Mistry, K.; Molina-Canteras, J.; Monrabal, F.; Monteiro, C. M. B.; Mora, F. J.; Muñoz Vidal, J.; Navarro, K.; Novella, P.; Nuñez, A.; Nygren, D.R.; Oblak, E.; Odriozola-Gimeno, M.; Palmeiro, B.; Para, A.; Querol, M.; Redwine, A.B.; Renner, J.; Rivilla, I.; Rodríguez, J.; Rogero, C.; Rogers, L.; Romeo, B.; Romo-Luque, C.; Santos, F. P.; Santos, J. M. F. dos; Simón, A.; Sorel, M.; Teixeira, J. M. R.; Toledo, J. F.; Torrent, J.; Usón, A.; Veloso, J. F. C. A.; Vuong, T.T.; Waiton, J.; White, J. T.
Abstract: Polytetrafluoroethylene (PTFE) is an excellent diffuse reflector widely used in light
collection systems for particle physics experiments. In noble element systems, it is often coated with
tetraphenyl butadiene (TPB) to allow detection of vacuum ultraviolet scintillation light. In this work
this dependence is investigated for PTFE coated with TPB in air for light of wavelengths of 200 nm,
260 nm, and 450 nm. The results show that TPB-coated PTFE has a reflectance of approximately
92% for thicknesses ranging from 5 mm to 10 mm at 450 nm, with negligible variation as a function
of thickness within this range. A cross-check of these results using an argon chamber supports the
conclusion that the change in thickness from 5 mm to 10 mm does not affect significantly the light
response at 128 nm. Our results indicate that pieces of TPB-coated PTFE thinner than the typical
10 mm can be used in particle physics detectors without compromising the light signal.2023-01-01T00:00:00ZLow-energy calibration of XENON1T with an internal 37 Ar source
https://hdl.handle.net/10316/113195
Title: Low-energy calibration of XENON1T with an internal 37 Ar source
Authors: Aprile, E.; Abe, K.; Agostini, F.; Ahmed Maouloud, S.; Alfonsi, M.; Althueser, L.; Andrieu, B.; Angelino, E.; Angevaare, J. R.; Antochi, V. C.; Antón Martin, D.; Arneodo, F.; Baudis, L.; Baxter, A. L.; Bellagamba, L.; Biondi, R.; Bismark, A.; Brown, A.; Bruenner, S.; Bruno, G.; Budnik, R.; Bui, T. K.; Cai, C.; Capelli, C.; Cardoso, J. M. R.; Cichon, D.; Colijn, A. P.; Conrad, J.; Cuenca-García, J. J.; Cussonneau, J. P.; D’Andrea, V.; Decowski, M. P.; DiGangi, P.; Di Pede, S.; Diglio, S.; Eitel, K.; Elykov, A.; Farrell, S.; Ferella, A. D.; Ferrari, C.; Fischer, H.; Fulgione, W.; Gaemers, P.; Gaior, R.; Gallo Rosso, A.; Galloway, M.; Gao, F.; Glade-Beucke, R.; Grandi, L.; Grigat, J.; Guida, M.; Hammann, R.; Higuera, A.; Hils, C.; Hoetzsch, L.; Howlett, J.; Iacovacci, M.; Itow, Y.; Jakob, J.; Joerg, F.; Joy, A.; Kato, N.; Kara, M.; Kavrigin, P.; Kazama, S.; Kobayashi, M.; Koltman, G.; Kopec, A.; Kuger, F.; Landsman, H.; Lang, R. F.; Levinson, L..; Li, I.; Li, S.; Liang, S.; Lindemann, S.; Lindner, M.; Liu, K.; Loizeau, J.; Lombardi, F.; Long, J.; Lopes, J. A. M.; Ma, Y.; Macolino, C.; Mahlstedt, J.; Mancuso, A.; Manenti, L.; Marignetti, F.; Marrodán Undagoitia, T.; Martens, K.; Masbou, J.; Masson, D.; Masson, E.; Mastroianni, S.; Messina, M.; Miuchi, K.; Mizukoshi, K.; Molinario, A.; Moriyama, S.; Morå, K .D.; Mosbacher, Y.; Murra, M.; Müller, J.; Ni, K.; Oberlack, U.; Paetsch, B.; Palacio, J.; Peres, R.; Peters, C.; Pienaar, J.; Pierre, M.; Pizzella, V.; Plante, G.; Qi, J.; Qin, J.; Ramírez García, D.; Reichard, S.; Rocchetti, A.; Rupp, N.; Sanchez, L.; Sanchez-Lucas, P.; Santos, Joaquim Marques Ferreira dos; Sarnoff, I.; Sartorelli, G.; Schreiner, J.; Schulte, D.; Schulte, P.; Schulze Eißing, H.; Schumann, M.; Lavina, L. Scotto; Selvi, M.; Semeria, F.; Shagin, P.; Shi, S.; Shockley, E.; Silva, M.; Simgen, H.; Takeda, A.; Tan, P.-L.; Terliuk, A.; Thers, D.; Toschi, F.; Trinchero, G.; Tunnell, C.; Tönnies, F.; Valerius, K.; Volta, G.; Weinheimer, C.; Weiss, M.; Wenz, D.; Wittweg, C.; Wolf, T.; Xu, D.; Xu, Z. R.; Yamashita, M.; Yang, L.; Ye, J.; Yuan, L.; Zavattini, G.; Zerbo, S.; Zhong, M.; Zhu, T.; Geppert, C.; Riemer, J.
Abstract: A low-energy electronic recoil calibration of
XENON1T, a dual-phase xenon time projection chamber,
with an internal 37Ar source was performed. This calibration
source features a 35-day half-life and provides two monoenergetic
lines at 2.82 keV and 0.27 keV. The photon yield
and electron yield at 2.82 keVare measured to be (32.3±0.3)
photons/keV and (40.6 ± 0.5) electrons/keV, respectively, in
agreement with other measurements and with NEST predictions.
The electron yield at 0.27 keVis alsomeasured and it is
(68.0+6.3
−3.7) electrons/keV. The 37Ar calibration confirms that
the detector is well-understood in the energy region close to
the detection threshold, with the 2.82 keV line reconstructed
at (2.83 ± 0.02) keV, which further validates the model used
to interpret the low-energy electronic recoil excess previously
reported by XENON1T. The ability to efficiently remove
argon with cryogenic distillation after the calibration proves
that 37Ar can be considered as a regular calibration source
for multi-tonne xenon detectors.2023-01-01T00:00:00ZDataset for identifying maintenance needs of home appliances using artificial intelligence
https://hdl.handle.net/10316/113010
Title: Dataset for identifying maintenance needs of home appliances using artificial intelligence
Authors: Fonseca, Tiago; Chaves, Pedro; Ferreira, Luis Lino; Gouveia, Nuno; Costa, David; Oliveira, André; Landeck, Jorge
Abstract: The ability to predict the maintenance needs of machines is generating increasing interest in a wide range of industries as it contributes to diminishing machine downtime and costs while increasing efficiency when compared to traditional maintenance approaches. Predictive maintenance (PdM) methods, based on state-of-the-art Internet of Things (IoT) systems and Artificial Intelligence (AI) techniques, are heavily dependent on data to create analytical models capable of identifying certain patterns which can represent a malfunction or deterioration in the monitored machines. Therefore, a realistic and representative dataset is paramount for creating, training, and validating PdM techniques. This paper introduces a new dataset, which integrates real-world data from home appliances, such as refrigerators and washing machines, suitable for the development and testing of PdM algorithms. The data was collected on various home appliances at a repair center and included readings of electrical current and vibration at low (1 Hz) and high (2048 Hz) sampling frequencies. The dataset samples are filtered and tagged with both normal and malfunction types. An extracted features dataset, corresponding to the collected working cycles is also made available. This dataset could benefit research and development of AI systems for home appliances' predictive maintenance tasks and outlier detection analysis. The dataset can also be repurposed for smart-grid or smart-home applications, predicting the consumption patterns of such home appliances.2023-06-01T00:00:00ZLIME -- a gas TPC prototype for directional Dark Matter search for the CYGNO experiment
https://hdl.handle.net/10316/113001
Title: LIME -- a gas TPC prototype for directional Dark Matter search for the CYGNO experiment
Authors: Amaro, Fernando Domingues; Baracchini, Elisabetta; Benussi, Luigi; Bianco, Stefano; Capoccia, Cesidio; Caponero, Michele; Cardoso, Danilo Santos; Cavoto, Gianluca; Cortez, André; Costa, Igor Abritta; Dané, Emiliano; Dho, Giorgio; Di Giambattista, Flaminia; Di Marco, Emanuele; D'Imperio, Giulia; Iacoangeli, Francesco; Lima Junior, Herman Pessoa; Lopes, Guilherme Sebastiao Pinheiro; Maccarrone, Giovanni; Mano, Rui Daniel Passos; Gregorio, Robert Renz Marcelo; Marques, David José Gaspar; Mazzitelli, Giovanni; McLean, Alasdair Gregor; Messina, Andrea; Monteiro, Cristina Maria Bernardes; Nobrega, Rafael Antunes; Pains, Igor Fonseca; Paoletti, Emiliano; Passamonti, Luciano; Pelosi, Sandro; Petrucci, Fabrizio; Piacentini, Stefano; Piccolo, Davide; Pierluigi, Daniele; Pinci, Davide; Prajapati, Atul; Renga, Francesco; Roque, Rita Joana da Cruz; Rosatelli, Filippo; Russo, Alessandro; Santos, Joaquim Marques Ferreira dos; Saviano, Giovanna; Spooner, Neil John Curwen; Tesauro, Roberto; Tommasini, Sandro; Torelli, Samuele
Abstract: The CYGNO experiment aims at the development of a large gaseous TPC with
GEM-based amplification and an optical readout by means of PMTs and scientific
CMOS cameras for 3D tracking down to O(keV) energies, for the directional
detection of rare events such as low mass Dark Matter and solar neutrino
interactions. The largest prototype built so far towards the realisation of the
CYGNO experiment demonstrator is the 50 L active volume LIME, with 4 PMTs and a
single sCMOS imaging a 33$\times$33 cm\textsuperscript{2} area for 50 cm drift,
that has been installed in underground Laboratori Nazionali del Gran Sasso in
February 2022. We will illustrate LIME performances as evaluated overground in
Laboratori Nazionali di Frascati by means of radioactive X-ray sources, and in
particular the detector stability, energy response and energy resolution. We
will discuss the MC simulation developed to reproduce the detector response and
show the comparison with actual data. We will furthermore examine the
background simulation worked out for LIME underground data taking and
illustrate the foreseen expected measurement and results in terms of natural
and materials intrinsic radioactivity characterisation and measurement of the
LNGS underground natural neutron flux. The results that will be obtained by
underground LIME installation will be paramount in the optimisation of the
CYGNO demonstrator, since this is foreseen to be composed by multiple modules
with the same LIME dimensions and characteristics.2023-06-29T00:00:00Z