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1. Data Compression in the NEXT-100 Data Acquisition System

Author: Esteve Bosch, Raúl, primary, Rodríguez Ponce, Jorge, additional, Simón Estévez, Ander, additional, Benlloch Rodríguez, José María, additional, Herrero Bosch, Vicente, additional, and Toledo Alarcón, José Francisco, additional
Published: 2022
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2. Desarrollo de un Proyecto Hardware utilizando Scrum en el Grado en Tecnologías Interactivas

Author: Toledo Alarcón, José Francisco, Marín-Roig Ramon, Jose, Azulay, Elías, Perez Pascual, Asun, Toledo Alarcón, José Francisco, Marín-Roig Ramon, Jose, Azulay, Elías, and Perez Pascual, Asun
Abstract: El aprendizaje de la electronica en la cuarta era industrial requiere un gran esfuerzo de motivacion de los estudiantes. Frecuentemente se sienten frustrados por lo queterminan dedicando menos tiempo del necesario para adquirirun conocimiento profundo. Con la finalidad de motivar a losalumnos en este proceso, se estan aplicando diferentes métodos de ensenanza-aprendizaje en varias Universidades [1]. Entre todos ellos, el aprendizaje basado en proyectos (PBL) ha demostradoser util para evitar la frustración y aumentar la implicación de los estudiantes. Esta metodología es incluso mas exitosa si se utiliza una estrategia de gestion de proyectos agil, como Scrum. Este trabajo describe una nueva manera de ensenar electrónica basada en el uso de PBL y Scrum. Se presentan resultados de suaplicacion en relación con la adquisición de algunas competencias transversales.
Published: 2022

3. Electrónica de control de un sistema de inyección para instrumentación analítica

Author: Toledo Alarcón, José Francisco, Poveda Lerma, Antonio, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Gómez Salinas, Iván, Toledo Alarcón, José Francisco, Poveda Lerma, Antonio, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, and Gómez Salinas, Iván
Abstract: [ES] El propósito de este proyecto consiste en el desarrollo y puesta en marcha de la electrónica para un sistema de inyección en equipos de instrumentación analítica. Para ello, se diseñará la parte hardware de la electrónica, tanto esquemáticos como layout. Una vez diseñada la electrónica, se verificará el correcto funcionamiento de todos los elementos mediante un sencillo firmware. Además de realizar una serie de pruebas para comprobar su viabilidad térmica y el diseño de protecciones para el cumplimiento de determinados ensayos de inmunidad (ED. ESD) asociados a los equipos de instrumentación analítica., [EN] The purpose of this project is the development and implementation of the electronics for an injection system in analytical instruments. For this, the hardware part of the electronics will be designed, schematic and layout. Once the electronics have been designed, the correct performance of all the elements will be verified by the implementation of a firmware. In addition, we are going to make a series of tests to verify its thermal viability and add protections for the compliance with the immunity requirements associated with analytical instruments.
Published: 2021

4. Grabación, edición y mezcla de la banda sonora musical del cortometraje ‘Soledad, tomemos un café’

Author: Sanchis Rico, Juan Manuel, Toledo Alarcón, José Francisco, Canós Marín, Antoni Josep, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, Álvaro Navarro, Ander, Sanchis Rico, Juan Manuel, Toledo Alarcón, José Francisco, Canós Marín, Antoni Josep, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, and Álvaro Navarro, Ander
Abstract: El objetivo final de este proyecto consiste en obtener una música original para la integración en un cortometraje realizado en la EPSG por alumnas de la Licenciatura de Comunicación Audiovisual.
Published: 2021

5. The Event Detection System in the NEXT-White Detector

Author: Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, European Commission, Generalitat Valenciana, U.S. Department of Energy, AGENCIA ESTATAL DE INVESTIGACION, MINISTERIO DE ECONOMIA Y EMPRESA, Ministerio de Economía y Competitividad, Ministerio de Ciencia, Innovación y Universidades, Fundação para a Ciência e a Tecnologia, Portugal, Esteve Bosch, Raul, Toledo Alarcón, José Francisco, Herrero Bosch, Vicente, Simón Estévez, Ander, Monrabal Capilla, Francesc, Álvarez-Puerta, Vicente, Rodriguez-Samaniego, Javier, Querol-Segura, Marc, Ballester Merelo, Francisco José, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, European Commission, Generalitat Valenciana, U.S. Department of Energy, AGENCIA ESTATAL DE INVESTIGACION, MINISTERIO DE ECONOMIA Y EMPRESA, Ministerio de Economía y Competitividad, Ministerio de Ciencia, Innovación y Universidades, Fundação para a Ciência e a Tecnologia, Portugal, Esteve Bosch, Raul, Toledo Alarcón, José Francisco, Herrero Bosch, Vicente, Simón Estévez, Ander, Monrabal Capilla, Francesc, Álvarez-Puerta, Vicente, Rodriguez-Samaniego, Javier, Querol-Segura, Marc, and Ballester Merelo, Francisco José
Abstract: [EN] This article describes the event detection system of the NEXT-White detector, a 5 kg high pressure xenon TPC with electroluminescent amplification, located in the Laboratorio Subterráneo de Canfranc (LSC), Spain. The detector is based on a plane of photomultipliers (PMTs) for energy measurements and a silicon photomultiplier (SiPM) tracking plane for offline topological event filtering. The event detection system, based on the SRS-ATCA data acquisition system developed in the framework of the CERN RD51 collaboration, has been designed to detect multiple events based on online PMT signal energy measurements and a coincidence-detection algorithm. Implemented on FPGA, the system has been successfully running and evolving during NEXT-White operation. The event detection system brings some relevant and new functionalities in the field. A distributed double event processor has been implemented to detect simultaneously two different types of events thus allowing simultaneous calibration and physics runs. This special feature provides constant monitoring of the detector conditions, being especially relevant to the lifetime and geometrical map computations which are needed to correct high-energy physics events. Other features, like primary scintillation event rejection, or a double buffer associated with the type of event being searched, help reduce the unnecessary data throughput thus minimizing dead time and improving trigger efficiency.
Published: 2021

6. Sensitivity of the NEXT experiment to 124-Xe double electron capture

Author: Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, European Commission, Generalitat Valenciana, U.S. Department of Energy, AGENCIA ESTATAL DE INVESTIGACION, MINISTERIO DE ECONOMIA Y EMPRESA, Ministerio de Economía y Competitividad, Ministerio de Ciencia, Innovación y Universidades, Fundação para a Ciência e a Tecnologia, Portugal, Martinez-Lema, G., Martinez-Vara, M., Sorel, M., Adams, C., Álvarez-Puerta, Vicente, Arazi, L., Arnquist, I.J., Azevedo, C. D. R., Bailey, K., Ballester Merelo, Francisco José, Benlloch-Rodriguez, J. M., Borges, F. I. G. M., Byrnes, N., Carcel, S., Carrión, J. V., Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Rodriguez-Samaniego, Javier, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, European Commission, Generalitat Valenciana, U.S. Department of Energy, AGENCIA ESTATAL DE INVESTIGACION, MINISTERIO DE ECONOMIA Y EMPRESA, Ministerio de Economía y Competitividad, Ministerio de Ciencia, Innovación y Universidades, Fundação para a Ciência e a Tecnologia, Portugal, Martinez-Lema, G., Martinez-Vara, M., Sorel, M., Adams, C., Álvarez-Puerta, Vicente, Arazi, L., Arnquist, I.J., Azevedo, C. D. R., Bailey, K., Ballester Merelo, Francisco José, Benlloch-Rodriguez, J. M., Borges, F. I. G. M., Byrnes, N., Carcel, S., Carrión, J. V., Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Rodriguez-Samaniego, Javier, and Toledo Alarcón, José Francisco
Abstract: [EN] Double electron capture by proton-rich nuclei is a second-order nuclear process analogous to double beta decay. Despite their similarities, the decay signature is quite di erent, potentially providing a new channel to measure the hypothesized neutrinoless mode of these decays. The Standard-Model-allowed two-neutrino double electron capture has been predicted for a number of isotopes, but only observed in 78Kr, 130Ba and, recently, 124Xe. The sensitivity to this decay establishes a benchmark for the ultimate experimental goal, namely the potential to discover also the lepton-number-violating neutrinoless version of this process. Here we report on the current sensitivity of the NEXT-White detector to 124Xe 2 ECEC and on the extrapolation to NEXT-100. Using simulated data for the 2 ECEC signal and real data from NEXT-White operated with 124Xe-depleted gas as background, we de ne an optimal event selection that maximizes the NEXT-White sensitivity. We estimate that, for NEXT-100 operated with xenon gas isotopically enriched with 1 kg of 124Xe and for a 5-year run, a sensitivity to the two-neutroni double electron capture half-life of 6x10exp22 years (at 90% con dence level) or better can be reached.
Published: 2021

7. Demonstration of background rejection using deep convolutional neural networks in the NEXT experiment

Author: Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, European Commission, Generalitat Valenciana, U.S. Department of Energy, AGENCIA ESTATAL DE INVESTIGACION, MINISTERIO DE ECONOMIA Y EMPRESA, Ministerio de Economía y Competitividad, Ministerio de Ciencia, Innovación y Universidades, Fundação para a Ciência e a Tecnologia, Portugal, Fundació Bancària Caixa d'Estalvis i Pensions de Barcelona, Kekic, M., Adams, C., Woodruff, K., Renner, J., Church, E., Del Tutto, M., Hernando Morata, J. A., Gomez-Cadenas, J. J., Álvarez-Puerta, Vicente, Arazi, L., Arnquist, I.J., Azevedo, C. D. R., Bailey, K., Ballester Merelo, Francisco José, Benlloch-Rodriguez, J. M., Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Rodriguez-Samaniego, Javier, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, European Commission, Generalitat Valenciana, U.S. Department of Energy, AGENCIA ESTATAL DE INVESTIGACION, MINISTERIO DE ECONOMIA Y EMPRESA, Ministerio de Economía y Competitividad, Ministerio de Ciencia, Innovación y Universidades, Fundação para a Ciência e a Tecnologia, Portugal, Fundació Bancària Caixa d'Estalvis i Pensions de Barcelona, Kekic, M., Adams, C., Woodruff, K., Renner, J., Church, E., Del Tutto, M., Hernando Morata, J. A., Gomez-Cadenas, J. J., Álvarez-Puerta, Vicente, Arazi, L., Arnquist, I.J., Azevedo, C. D. R., Bailey, K., Ballester Merelo, Francisco José, Benlloch-Rodriguez, J. M., Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Rodriguez-Samaniego, Javier, and Toledo Alarcón, José Francisco
Abstract: [EN] Convolutional neural networks (CNNs) are widely used state-of-the-art computer vision tools that are becoming increasingly popular in high-energy physics. In this paper, we attempt to understand the potential of CNNs for event classification in the NEXT experiment, which will search for neutrinoless double-beta decay in Xe-136. To do so, we demonstrate the usage of CNNs for the identification of electron-positron pair production events, which exhibit a topology similar to that of a neutrinoless double-beta decay event. These events were produced in the NEXT-White high-pressure xenon TPC using 2.6 MeV gamma rays from a Th-228 calibration source. We train a network on Monte Carlo-simulated events and show that, by applying on-the-fly data augmentation, the network can be made robust against differences between simulation and data. The use of CNNs offers significant improvement in signal efficiency and background rejection when compared to previous non-CNN-based analyses
Published: 2021

8. Low-diffusion Xe-He gas mixtures for rare-event detection: electroluminescence yield

Author: Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, European Commission, Generalitat Valenciana, U.S. Department of Energy, AGENCIA ESTATAL DE INVESTIGACION, MINISTERIO DE ECONOMIA Y EMPRESA, University of Texas at Arlington, Laboratorio Subterráneo de Canfranc, Ministerio de Economía y Competitividad, Ministerio de Ciencia, Innovación y Universidades, Fundação para a Ciência e a Tecnologia, Portugal, Fernandes, A.F.M., Henriques, C.A.O., Mano, R.D.P., González-Díaz, D., Azevedo, C.D.R., Silva, P.A.O.C., Gómez-Cadenas, J.J., Freitas, E.D.C., Fernandes, L.M.P., Monteiro, C.M.B., Adams, C., Álvarez-Puerta, Vicente, Arazi, L., Arnquist, I.J., Bailey, K., Ballester Merelo, Francisco José, Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Rodriguez-Samaniego, Javier, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, European Commission, Generalitat Valenciana, U.S. Department of Energy, AGENCIA ESTATAL DE INVESTIGACION, MINISTERIO DE ECONOMIA Y EMPRESA, University of Texas at Arlington, Laboratorio Subterráneo de Canfranc, Ministerio de Economía y Competitividad, Ministerio de Ciencia, Innovación y Universidades, Fundação para a Ciência e a Tecnologia, Portugal, Fernandes, A.F.M., Henriques, C.A.O., Mano, R.D.P., González-Díaz, D., Azevedo, C.D.R., Silva, P.A.O.C., Gómez-Cadenas, J.J., Freitas, E.D.C., Fernandes, L.M.P., Monteiro, C.M.B., Adams, C., Álvarez-Puerta, Vicente, Arazi, L., Arnquist, I.J., Bailey, K., Ballester Merelo, Francisco José, Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Rodriguez-Samaniego, Javier, and Toledo Alarcón, José Francisco
Abstract: [EN] High pressure xenon Time Projection Chambers (TPC) based on secondary scintillation (electroluminescence) signal amplification are being proposed for rare event detection such as directional dark matter, double electron capture and double beta decay detection. The discrimination of the rare event through the topological signature of primary ionisation trails is a major asset for this type of TPC when compared to single liquid or double-phase TPCs, limited mainly by the high electron diffusion in pure xenon. Helium admixtures with xenon can be an attractive solution to reduce the electron diffu- sion significantly, improving the discrimination efficiency of these optical TPCs. We have measured the electroluminescence (EL) yield of Xe-He mixtures, in the range of 0 to 30% He and demonstrated the small impact on the EL yield of the addition of helium to pure xenon. For a typical reduced electric field of 2.5 kV/cm/bar in the EL region, the EL yield is lowered by similar to 2%, 3%, 6% and 10% for 10%, 15%, 20% and 30% of helium concentration, respectively. This decrease is less than what has been obtained from the most recent simulation framework in the literature. The impact of the addition of helium on EL statistical fluctuations is negligible, within the experimental uncertainties. The present results are an important benchmark for the simulation tools to be applied to future optical TPCs based on Xe-He mixtures.
Published: 2020

9. Dependence of polytetrafluoroethylene reflectance on thickness at visible and ultraviolet wavelengths in air

Author: Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, European Commission, Generalitat Valenciana, U.S. Department of Energy, AGENCIA ESTATAL DE INVESTIGACION, MINISTERIO DE ECONOMIA Y EMPRESA, University of Texas at Arlington, Ministerio de Economía y Competitividad, Ministerio de Ciencia, Innovación y Universidades, Fundação para a Ciência e a Tecnologia, Portugal, Fundació Bancària Caixa d'Estalvis i Pensions de Barcelona, Ghosh, S., Haefner, J., Martín-Albo, J., Guenette, R., Li, X., Loya Villalpando, A.A., Burch, C., Adams, C., Álvarez-Puerta, Vicente, Arazi, L., Arnquist, I.J., Azevedo, C.D.R., Bailey, K., Ballester Merelo, Francisco José, Benlloch-Rodríguez, J.M., Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Rodriguez-Samaniego, Javier, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, European Commission, Generalitat Valenciana, U.S. Department of Energy, AGENCIA ESTATAL DE INVESTIGACION, MINISTERIO DE ECONOMIA Y EMPRESA, University of Texas at Arlington, Ministerio de Economía y Competitividad, Ministerio de Ciencia, Innovación y Universidades, Fundação para a Ciência e a Tecnologia, Portugal, Fundació Bancària Caixa d'Estalvis i Pensions de Barcelona, Ghosh, S., Haefner, J., Martín-Albo, J., Guenette, R., Li, X., Loya Villalpando, A.A., Burch, C., Adams, C., Álvarez-Puerta, Vicente, Arazi, L., Arnquist, I.J., Azevedo, C.D.R., Bailey, K., Ballester Merelo, Francisco José, Benlloch-Rodríguez, J.M., Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Rodriguez-Samaniego, Javier, and Toledo Alarcón, José Francisco
Abstract: [EN] Polytetrafluoroethylene (PTFE) is an excellent diffuse reflector widely used in light collection systems for particle physics experiments. However, the reflectance of PTFE is a function of its thickness. In this work, we investigate this dependence in air for light of wavelengths 260 nm and 450 nm using two complementary methods. We find that PTFE reflectance for thicknesses from 5 mm to 10 mm ranges from 92.5% to 94.5% at 450 nm, and from 90.0% to 92.0% at 260 nm We also see that the reflectance of PIFE of a given thickness can vary by as much as 2.7% within the same piece of material. Finally, we show that placing a specular reflector behind the PTFE can recover the loss of reflectance in the visible without introducing a specular component in the reflectance.
Published: 2020

10. Mitigation of backgrounds from cosmogenic Xe-137 in xenon gas experiments using He-3 neutron capture

Author: Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, European Commission, Generalitat Valenciana, U.S. Department of Energy, Agencia Estatal de Investigación, Laboratorio Subterráneo de Canfranc, Ministerio de Economía y Competitividad, Ministerio de Ciencia, Innovación y Universidades, Fundação para a Ciência e a Tecnologia, Portugal, Rogers, L., Jones, B. J. P., Laing, A., Pingulkar, S., Smithers, B., Woodruff, K., Adams, C., Álvarez-Puerta, Vicente, Arazi, L., Arnquist, I. J., Azevedo, C. D. R., Bailey, K., Ballester Merelo, Francisco José, Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Rodriguez-Samaniego, Javier, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, European Commission, Generalitat Valenciana, U.S. Department of Energy, Agencia Estatal de Investigación, Laboratorio Subterráneo de Canfranc, Ministerio de Economía y Competitividad, Ministerio de Ciencia, Innovación y Universidades, Fundação para a Ciência e a Tecnologia, Portugal, Rogers, L., Jones, B. J. P., Laing, A., Pingulkar, S., Smithers, B., Woodruff, K., Adams, C., Álvarez-Puerta, Vicente, Arazi, L., Arnquist, I. J., Azevedo, C. D. R., Bailey, K., Ballester Merelo, Francisco José, Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Rodriguez-Samaniego, Javier, and Toledo Alarcón, José Francisco
Abstract: [EN] Xe-136 is used as the target medium for many experiments searching for 0 nu beta beta. Despite underground operation, cosmic muons that reach the laboratory can produce spallation neutrons causing activation of detector materials. A potential background that is difficult to veto using muon tagging comes in the form of Xe-137 created by the capture of neutrons on Xe-136. This isotope decays via beta decay with a half-life of 3.8 min and a Q(beta) of similar to 4.16 MeV. This work proposes and explores the concept of adding a small percentage of He-3 to xenon as a means to capture thermal neutrons and reduce the number of activations in the detector volume. When using this technique we find the contamination from Xe-137 activation can be reduced to negligible levels in tonne and multi-tonne scale high pressure gas xenon neutrinoless double beta decay experiments running at any depth in an underground laboratory.
Published: 2020

11. Radio Frequency and DC High Voltage Breakdown of High Pressure Helium, Argon, and Xenon

Author: Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Agencia Estatal de Investigación, Ministerio de Economía y Empresa, Ministerio de Economía y Competitividad, Woodruff, K., Baeza-Rubio, J., Huerta, D., Jones, B. J. P., McDonald, A. D., Norman, L., Nygren, D. R., Adams, C., Álvarez-Puerta, Vicente, Arazi, L., Arnquist, I. J., Azevedo, C. D. R., Bailey, K., Ballester Merelo, Francisco José, Benlloch-Rodriguez, J. M., Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Rodriguez-Samaniego, Javier, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Agencia Estatal de Investigación, Ministerio de Economía y Empresa, Ministerio de Economía y Competitividad, Woodruff, K., Baeza-Rubio, J., Huerta, D., Jones, B. J. P., McDonald, A. D., Norman, L., Nygren, D. R., Adams, C., Álvarez-Puerta, Vicente, Arazi, L., Arnquist, I. J., Azevedo, C. D. R., Bailey, K., Ballester Merelo, Francisco José, Benlloch-Rodriguez, J. M., Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Rodriguez-Samaniego, Javier, and Toledo Alarcón, José Francisco
Abstract: [EN] Motivated by the possibility of guiding daughter ions from double beta decay events to single-ion sensors for barium tagging, the NEXT collaboration is developing a program of R&D to test radio frequency (RF) carpets for ion transport in high pressure xenon gas. This would require carpet functionality in regimes at higher pressures than have been previously reported, implying correspondingly larger electrode voltages than in existing systems. This mode of operation appears plausible for contemporary RF-carpet geometries due to the higher predicted breakdown strength of high pressure xenon relative to low pressure helium, the working medium in most existing RF carpet devices. In this paper we present the first measurements of the high voltage dielectric strength of xenon gas at high pressure and at the relevant RF frequencies for ion transport (in the 10MHz range), as well as new DC and RF measurements of the dielectric strengths of high pressure argon and helium gases at small gap sizes. We find breakdown voltages that are compatible with stable RF carpet operation given the gas, pressure, voltage, materials and geometry of interest.
Published: 2020

12. Diseño y control de un convertidor electrónico resonante aplicado a las iluminarias tipo led mediante el procesador digital 28027

Author: Gimeno Sales, Francisco José, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Nieto Hervás, Jesús, Gimeno Sales, Francisco José, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, and Nieto Hervás, Jesús
Abstract: [ES] Transmisión de potencia, 12W aproximadamente, suficiente para una carga de iluminaria o para carga de algún dispositivo electrónico o una batería. Todo mediante la propiedad física de la inducción, que hace que se acople electromagnéticamente dos antenas (bobinas) y se hace un intercambio de energía sin necesidad de cables, aunque estaremos limitados por la distancia entre las antenas. Ademas de un control digital sobre el convertidor resonante implementado mediante el procesador digital TMS320F28027., [EN] Power transmission, approximately 12W, sufficient for a light load or for charging of an electronic device or a battery. All through the physical property of induction, which causes electromagnetically to couple two antennas (coils) and make an energy exchange without cables, although we will be limited by the distance between the antennas. In addition to a digital control on the resonant converter implemented by the digital processor TMS320F28027.
Published: 2020

13. Radiogenic backgrounds in the NEXT double beta decay experiment

Author: Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, European Commission, Generalitat Valenciana, U.S. Department of Energy, Agencia Estatal de Investigación, University of Texas at Arlington, Ministerio de Economía y Competitividad, Ministerio de Ciencia, Innovación y Universidades, Fundação para a Ciência e a Tecnologia, Portugal, Novella, P., Palmeiro, B., Sorel, M., Usón, A., Ferrario, P., Gómez-Cadenas, J. J., Adams, C., Álvarez-Puerta, Vicente, Arazi, L., Arnquist, I.J., Azevedo, C.D.R., Bailey, K., Ballester Merelo, Francisco José, Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Rodriguez-Samaniego, Javier, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, European Commission, Generalitat Valenciana, U.S. Department of Energy, Agencia Estatal de Investigación, University of Texas at Arlington, Ministerio de Economía y Competitividad, Ministerio de Ciencia, Innovación y Universidades, Fundação para a Ciência e a Tecnologia, Portugal, Novella, P., Palmeiro, B., Sorel, M., Usón, A., Ferrario, P., Gómez-Cadenas, J. J., Adams, C., Álvarez-Puerta, Vicente, Arazi, L., Arnquist, I.J., Azevedo, C.D.R., Bailey, K., Ballester Merelo, Francisco José, Benlloch-Rodríguez, J. M., Borges, F. I. G. M., Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Rodriguez-Samaniego, Javier, and Toledo Alarcón, José Francisco
Abstract: [EN] Natural radioactivity represents one of the main backgrounds in the search for neutrinoless double beta decay. Within the NEXT physics program, the radioactivity- induced backgrounds are measured with the NEXT-White detector. Data from 37.9 days of low-background operations at the Laboratorio Subterraneo de Canfranc with xenon depleted in Xe-136 are analyzed to derive a total background rate of (0.84 +/- 0.02) mHz above 1000 keV. The comparison of data samples with and without the use of the radon abatement system demonstrates that the contribution of airborne-Rn is negligible. A radiogenic background model is built upon the extensive radiopurity screening campaign conducted by the NEXT collaboration. A spectral fit to this model yields the specific contributions of Co-60, K-40, Bi-214 and Tl-208 to the total background rate, as well as their location in the detector volumes. The results are used to evaluate the impact of the radiogenic backgrounds in the double beta decay analyses, after the application of topological cuts that reduce the total rate to (0.25 +/- 0.01) mHz. Based on the best-fit background model, the NEXT-White median sensitivity to the two-neutrino double beta decay is found to be 3.5 sigma after 1 year of data taking. The background measurement in a Q(beta beta)+/- 100 keV energy window validates the best-fit background model also for the neutrinoless double beta decay search with NEXT-100. Only one event is found, while the model expectation is (0.75 +/- 0.12) events.
Published: 2019

14. Electroluminescence TPCs at the thermal diffusion limit

Author: Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Generalitat Valenciana, U.S. Department of Energy, Ministerio de Economía y Competitividad, Ministerio de Ciencia, Innovación y Universidades, Fundação para a Ciência e a Tecnologia, Portugal, Henriques, C. A. O., Monteiro, C. M. B., Gonzalez-Diaz, D., Azevedo, C. D. R., Freitas, E. D. C., Mano, R. D. P., Jorge, M. R., Fernandes, A. F. M., Gomez-Cadenas, J. J., Fernandes, L. M. P., Álvarez-Puerta, Vicente, Ballester Merelo, Francisco José, Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Rodriguez-Samaniego, Javier, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Generalitat Valenciana, U.S. Department of Energy, Ministerio de Economía y Competitividad, Ministerio de Ciencia, Innovación y Universidades, Fundação para a Ciência e a Tecnologia, Portugal, Henriques, C. A. O., Monteiro, C. M. B., Gonzalez-Diaz, D., Azevedo, C. D. R., Freitas, E. D. C., Mano, R. D. P., Jorge, M. R., Fernandes, A. F. M., Gomez-Cadenas, J. J., Fernandes, L. M. P., Álvarez-Puerta, Vicente, Ballester Merelo, Francisco José, Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Rodriguez-Samaniego, Javier, and Toledo Alarcón, José Francisco
Abstract: [EN] The NEXT experiment aims at searching for the hypothetical neutrinoless double-beta decay from the 136Xe isotope using a high-purity xenon TPC. Efficient discrimination of the events through pattern recognition of the topology of primary ionisation tracks is a major requirement for the experiment. However, it is limited by the diffusion of electrons. It is known that the addition of a small fraction of a molecular gas to xenon reduces electron diffusion. On the other hand, the electroluminescence (EL) yield drops and the achievable energy resolution may be compromised. We have studied the effect of adding several molecular gases to xenon (CO2, CH4 and CF4) on the EL yield and energy resolution obtained in a small prototype of driftless gas proportional scintillation counter. We have compared our results on the scintillation characteristics (EL yield and energy resolution) with a microscopic simulation, obtaining the diffusion coefficients in those conditions as well. Accordingly, electron diffusion may be reduced from about 10 mm/ sqrt(¿) for pure xenon down to 2.5 mm/sqrt(m) using additive concentrations of about 0.05%, 0.2% and 0.02% for CO2, CH4 and CF4, respectively. Our results show that CF4 admixtures present the highest EL yield in those conditions, but very poor energy resolution as a result of huge fluctuations observed in the EL formation. CH4 presents the best energy resolution despite the EL yield being the lowest. The results obtained with xenon admixtures are extrapolated to the operational conditions of the NEXT-100 TPC. CO2 and CH4 show potential as molecular additives in a large xenon TPC. While CO2 has some operational constraints, making it difficult to be used in a large TPC, CH4 shows the best performance and stability as molecular additive to be used in the NEXT-100 TPC, with an extrapolated energy resolution of 0.4% at 2.45 MeV for concentrations below 0.4%, which is only slightly worse than the one obtained for pure xenon. We demonstrate
Published: 2019

15. Demonstration of the event identification capabilities of the NEXT-White detector

Author: Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, European Commission, Generalitat Valenciana, U.S. Department of Energy, European Research Council, Agencia Estatal de Investigación, Ministerio de Economía y Empresa, Ministerio de Economía y Competitividad, Ministerio de Ciencia, Innovación y Universidades, Fundação para a Ciência e a Tecnologia, Portugal, Ferrario, Paola, Benlloch-Rodríguez, J.M., Díaz López, G., Hernando Morata, J.A., Kekic, M., Renner, J., Usón, A., Gómez-Cadenas, J.J., Adams, C., Álvarez-Puerta, Vicente, Arazi, L., Arnquist, I.J., Azevedo, C.D.R., Bailey, K., Ballester Merelo, Francisco José, Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Rodriguez-Samaniego, Javier, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, European Commission, Generalitat Valenciana, U.S. Department of Energy, European Research Council, Agencia Estatal de Investigación, Ministerio de Economía y Empresa, Ministerio de Economía y Competitividad, Ministerio de Ciencia, Innovación y Universidades, Fundação para a Ciência e a Tecnologia, Portugal, Ferrario, Paola, Benlloch-Rodríguez, J.M., Díaz López, G., Hernando Morata, J.A., Kekic, M., Renner, J., Usón, A., Gómez-Cadenas, J.J., Adams, C., Álvarez-Puerta, Vicente, Arazi, L., Arnquist, I.J., Azevedo, C.D.R., Bailey, K., Ballester Merelo, Francisco José, Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Rodriguez-Samaniego, Javier, and Toledo Alarcón, José Francisco
Abstract: [EN] In experiments searching for neutrinoless double-beta decay, the possibility of identifying the two emitted electrons is a powerful tool in rejecting background events and therefore improving the overall sensitivity of the experiment. In this paper we present the first measurement of the efficiency of a cut based on the different event signatures of double and single electron tracks, using the data of the NEXT-White detector, the first detector of the NEXT experiment operating underground. Using a 228Th calibration source to produce signal-like and background-like events with energies near 1.6 MeV, a signal efficiency of 71.6 ± 1.5 stat ± 0.3 sys% for a background acceptance of 20.6 ± 0.4 stat ± 0.3 sys% is found, in good agreement with Monte Carlo simulations. An extrapolation to the energy region of the neutrinoless double beta decay by means of Monte Carlo simulations is also carried out, and the results obtained show an improvement in background rejection over those obtained at lower energies.
Published: 2019

16. Integración de memorias DDR3L y LPDDR4 en circuitos impresos

Author: Toledo Alarcón, José Francisco, García Guardiola, David, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Guerrero López, José Carlos, Toledo Alarcón, José Francisco, García Guardiola, David, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, and Guerrero López, José Carlos
Abstract: [ES] En este trabajo final de Master se analizará la integración física de memorias tipo SDRAM DDR en tarjetas de circuito impreso. El análisis se basará en dos versiones de un diseño realizadas en Celestica Valencia S.A.U., en las cuales he participado activamente durante el desarrollo de esquemas eléctricos y circuitos impresos, selección de componentes y especificaciones funcionales. Primeramente se presentarán las versiones del diseño, ‘PID DDR3L’ y ‘PID LPDDR4’, un circuito impreso de 10 capas cuya arquitectura hardware está basada en microprocesadores de la familia iMX de NXP. Cámara, conectividad Wi-Fi y BLE, carga inalámbrica o RFID, son algunas de las características presentes en este diseño, que empeñará funciones de conectividad y procesamiento de datos en un dispositivo portátil de diagnóstico médico para recintos hospitalarios. Se describirán las características eléctricas y funcionales de las dos generaciones de memorias empleadas, DDR3L y LPDDR4, así como las diferencias más notables entre ellas. Además, se justificará la estructura de capas del circuito y la aplicación de normas de diseño para el control de la impedancia de las líneas y la integridad de señal. Finalmente se analizará la integración física en el circuito impreso de ambas versiones, teniendo en cuenta las restricciones marcadas por las guías de diseño empleadas. Más allá de la parte técnica de diseño, se pretende mostrar también detalles relacionados con los fabricantes de componentes electrónicos y circuitos impresos que han participado durante el desarrollo del proyecto. Además de estudiar la integración de las memorias, el objetivo de este trabajo es dar una visión global del diseño de circuitos impresos de alta velocidad en un entorno profesional., [EN] The physical integration on printed circuit boards of SDRAM DDR memories will be analyzed In during this final Master's project. The entire analysis will be based on two different versions of a design made in Celestica Valencia S.A.U. in which I have actively participated during the design of printed circuits and schematics, selection of components and functional specifications. Firstly, both versions of the design will be presented, ‘PID DDR3L’ & ‘PID LPDDR4’, a 10-layer printed circuit which hardware architecture is based on multi-core microprocessors from i.MX family of NXP. Camera interface, Wi-Fi and BLE connectivity, wireless charging and RFID are some of the main features of this design, which will involve connectivity functionality and data processing in a medical portable diagnostic device for hospital premises. The electrical and functional characteristics of the memories used will be described, DDR3L and LPDDR4, besides their most noticeable differences. Moreover, the stack up structure and the proper design rules appliance for impedance control of single-ended traces and signal integrity will be justified. Finally, the physical integration of both versions will be analyzed, taking care of the design constraints stablished on the followed guidelines. Beyond the technical part of design, it is also intended to show some details related to manufacturers of electronic components and printed circuits that have participated during the development of the project. Besides the integration of these memories, the main goal of this project is to provide a global view of the high-speed printed circuit design in a professional environment., [CA] En aquest treball final de Màster s’analitzarà la integració física de memòries tipus SDRAM DDR en targetes de circuit imprès. L'anàlisi es basarà en dues versions d’un disseny realitzades a Celestica València S.A.U. en les quals he participat activament al llarg del disseny d'esquemes i circuits impresos, selecció de components i especificacions funcionals. Primerament es presentaran les versions del disseny, ‘PID DDR3L’ y ‘PID LPDDR4’, un circuit imprès de 10 capes amb una estructura hardware de microprocessadors de la família i.MX de NXP. Càmera, connectivitat Wi-Fi i BLE, càrrega sense fils o RFID, són algunes de les característiques principals d'aquest disseny, que obstinarà funcions de connectivitat i processament de dades en un dispositiu portàtil de diagnòstic mèdic per a recintes hospitalaris. Es descriuran les característiques elèctriques i funcionals de les dues generacions de memòries emprades, DDR3L y LPDDR4, així com les diferències més notables entre elles. A més, es justificarà l’estructura de capes del circuit i l’aplicació de normes de disseny per al control de la impedància de les línies i la integritat de senyal. Finalment s’analitzarà la integració física en el circuit imprès d’ambdues versions, tenint en compte les restriccions marcades per les guies de disseny empleades. Més enllà de la part tècnica del disseny, es pretén mostrar també alguns detalls relacionats amb fabricants de components electrònics i circuits impresos que han participat al llarg del desenvolupament del projecte. A més d’estudiar la integració de les memòries, l’objectiu d’aquest treball és donar una visió global del disseny de circuits impresos d’alta velocitat en un entorn professional.
Published: 2019

17. The electronics of the energy plane of the NEXT-White detector

Author: Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, European Commission, Generalitat Valenciana, U.S. Department of Energy, European Research Council, Fundação para a Ciência e a Tecnologia, Portugal, Ministerio de Economía y Competitividad, Álvarez-Puerta, Vicente, Herrero Bosch, Vicente, Esteve Bosch, Raul, Laing, A., Rodriguez-Samaniego, Javier, Querol-Segura, Marc, Monrabal, Francesc, Toledo Alarcón, José Francisco, Gómez-Cadenas, J.J., Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, European Commission, Generalitat Valenciana, U.S. Department of Energy, European Research Council, Fundação para a Ciência e a Tecnologia, Portugal, Ministerio de Economía y Competitividad, Álvarez-Puerta, Vicente, Herrero Bosch, Vicente, Esteve Bosch, Raul, Laing, A., Rodriguez-Samaniego, Javier, Querol-Segura, Marc, Monrabal, Francesc, Toledo Alarcón, José Francisco, and Gómez-Cadenas, J.J.
Abstract: [EN] This paper describes the electronics of NEXT-White (NEW) detector PMT plane, a high pressure xenon TPC with electroluminescent amplification (HPXe-EL) currently operating at the Laboratorio Subterraneo de Canfranc (LSC) in Huesca, Spain. In NEXT-White the energy of the event is measured by a plane of photomultipliers (PMTs) located behind a transparent cathode. The PMTs are Hamamatsu R11410-10 chosen due to their low radioactivity. The electronics have been designed and implemented to fulfill strict requirements: an overall energy resolution below 1% and a radiopurity budget of 20 mBq unit(-1) in the chain of Bi-214. All the components and materials have been carefully screened to assure a low radioactivity level and at the same time meet the required front-end electronics specifications. In order to reduce low frequency noise effects and enhance detector safety a grounded cathode connection has been used for the PMTs. This implies an AC-coupled readout and baseline variations in the PMT signals. A detailed description of the electronics and a novel approach based on a digital baseline restoration to obtain a linear response and handle AC coupling effects is presented. The final PMT channel design has been characterized with linearity better than 0.4% and noise below 0.4mV.
Published: 2019

18. Design and implementation of an electrode and body impedance emulation system

Author: Toledo Alarcón, José Francisco, Conchell Año, Jose Carlos, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Almagro Rodríguez, Antonio, Toledo Alarcón, José Francisco, Conchell Año, Jose Carlos, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, and Almagro Rodríguez, Antonio
Abstract: Dentro de su periodo de prácticas en empresa en Analog Devices (Valencia), el alumno desarrollará un sistema de test para un nuevo producto de la empresa orientado a medida de impedancia con aplicaciones biométricas. Tras documentarse sobre los modelos más adecuados para los electrodos de medida y del cuerpo humano, el alumno diseñará un módulo electrónico basado en microproesador con interfaz USB y un software de control en PC (Labview y Python) que permita elegir diferentes valores R, C para el modelo. Su trabajo incluirá también la programación en C del microcontrolador, la verificación del funcionamiento del módulo y la validación del mismo como plataforma de test del nuevo producto de Analog Devices.
Published: 2019

19. Microscopic simulation of xenon-based optical TPCs in the presence of molecular additives

Author: Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Generalitat Valenciana, U.S. Department of Energy, European Regional Development Fund, Ministerio de Economía y Competitividad, Ministerio de Ciencia, Innovación y Universidades, Fundação para a Ciência e a Tecnologia, Portugal, Azevedo, C.D.R., Gonzalez-Diaz, D., Biagi, S. F., Oliveira, C. A. B., Henriques, C. A. O., Escada, J., Monrabal, F., Gomez-Cadenas, J. J., Álvarez-Puerta, Vicente, Alvarez, V., Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Querol-Segura, Marc, Rodriguez-Samaniego, Javier, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Generalitat Valenciana, U.S. Department of Energy, European Regional Development Fund, Ministerio de Economía y Competitividad, Ministerio de Ciencia, Innovación y Universidades, Fundação para a Ciência e a Tecnologia, Portugal, Azevedo, C.D.R., Gonzalez-Diaz, D., Biagi, S. F., Oliveira, C. A. B., Henriques, C. A. O., Escada, J., Monrabal, F., Gomez-Cadenas, J. J., Álvarez-Puerta, Vicente, Alvarez, V., Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Querol-Segura, Marc, Rodriguez-Samaniego, Javier, and Toledo Alarcón, José Francisco
Abstract: [EN] We introduce a simulation framework for the transport of high and low energy electrons in xenon-based optical time projection chambers (OTPCs). The simulation relies on elementary cross sections (electron-atom and electron-molecule) and incorporates, in order to compute the gas scintillation, the reaction/quenching rates (atom-atom and atom-molecule) of the first 41 excited states of xenon and the relevant associated excimers, together with their radiative cascade. The results compare positively with observations made in pure xenon and its mixtures with CO2 and CF4 in a range of pressures from 0.1 to 10 bar. This work sheds some light on the elementary processes responsible for the primary and secondary xenon-scintillation mechanisms in the presence of additives, that are of interest to the OTPC technology.
Published: 2018

20. The Next White (NEW) detector

Author: Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Generalitat Valenciana, U.S. Department of Energy, European Regional Development Fund, Ministerio de Ciencia, Innovación y Universidades, Fundação para a Ciência e a Tecnologia, Portugal, Monrabal, F., Gomez-Cadenas, J. J., Toledo Alarcón, José Francisco, Laing, A., Álvarez-Puerta, Vicente, Benlloch-Rodriguez, J. M., Carcel, S., Carrion, J, Esteve Bosch, Raul, Felkai, R., Herrero Bosch, Vicente, Martinez, A., Musti, M., Ouero, M., Mora Mas, Francisco José, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Generalitat Valenciana, U.S. Department of Energy, European Regional Development Fund, Ministerio de Ciencia, Innovación y Universidades, Fundação para a Ciência e a Tecnologia, Portugal, Monrabal, F., Gomez-Cadenas, J. J., Toledo Alarcón, José Francisco, Laing, A., Álvarez-Puerta, Vicente, Benlloch-Rodriguez, J. M., Carcel, S., Carrion, J, Esteve Bosch, Raul, Felkai, R., Herrero Bosch, Vicente, Martinez, A., Musti, M., Ouero, M., and Mora Mas, Francisco José
Abstract: [EN] Conceived to host 5 kg of xenón at a pressure of 15 bar in the ¿ducial volume,the NEXTWhite (NEW)apparatus is currently the largest high pressure xenon gas TPC using electroluminescent ampli¿cation in the world. It is also a 1:2 scale model of the NEXT-100 detector scheduled to start searching for ßß0¿ decays in 136Xe in 2019. Both detectors measure the energy of the event using a plane of photomultipliers located behind a transparent cathode. They can also reconstruct the trajectories of charged tracks in the dense gas of the TPC with the help of a plane of silicon photomultipliers located behind the anode. A sophisticated gas system, common to both detectors, allows the high gas purity needed to guarantee a long electron lifetime. NEXT-White has been operating since October 2017 at the Canfranc Underground Laboratory (LSC), in Spain. This paper describes the detector and associated infrastructures.
Published: 2018

21. Electron drift properties in high pressure gaseous xenon

Author: Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Generalitat Valenciana, U.S. Department of Energy, European Regional Development Fund, Ministerio de Ciencia, Innovación y Universidades, Fundação para a Ciência e a Tecnologia, Portugal, Simon, A., Felkai, R., Martinez-Lema, G., Monrabal, F., Gonzalez-Diaz, D., Sorel, M., Hernando Morata, J. A., Gomez-Cadenas, J. J., Adams, C., Álvarez-Puerta, Vicente, Ballester Merelo, Francisco José, Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Generalitat Valenciana, U.S. Department of Energy, European Regional Development Fund, Ministerio de Ciencia, Innovación y Universidades, Fundação para a Ciência e a Tecnologia, Portugal, Simon, A., Felkai, R., Martinez-Lema, G., Monrabal, F., Gonzalez-Diaz, D., Sorel, M., Hernando Morata, J. A., Gomez-Cadenas, J. J., Adams, C., Álvarez-Puerta, Vicente, Ballester Merelo, Francisco José, Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, and Toledo Alarcón, José Francisco
Abstract: [EN] Gaseous time projection chambers (TPC) are a very attractive detector technology for particle tracking. Characterization of both drift velocity and di¿usion is of great importance to correctly assess their tracking capabilities. NEXT-White is a High Pressure Xenon gas TPC with electroluminescent ampli¿cation, a 1:2 scale model of the future NEXT-100detector, which will be dedicated to neutrinoless double beta decay searches. NEXT-White has been operating at Canfranc Underground Laboratory (LSC) since December2016. The drift parameters have been measured using 83mKr for a range of reduced drift ¿elds at two di¿erent pressure regimes, namely 7.2 bar and 9.1 bar. Theresults have been compared with Magboltz simulations. Agreement at the 5% level or better has been found for drift velocity, longitudinal di¿usion and transverse di¿usion.
Published: 2018

22. Demonstration of Single-Barium-Ion Sensitivity for Neutrinoless Double-Beta Decay Using Single-Molecule Fluorescence Imaging

Author: Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Generalitat Valenciana, U.S. Department of Energy, Ministerio de Economía y Empresa, University of Texas at Arlington, European Regional Development Fund, Ministerio de Ciencia, Innovación y Universidades, McDonald, A.D., Jones, B.J.P., Nygren, D.R., Adams, C., Álvarez-Puerta, Vicente, Azevedo, C.D.R., Benlloch-Rodríguez, J.M., Borges, F.I.G.M., Botas, A., Cárcel García, Sara, Carrión Burguete, José Vicente, Cebrian, S., Conde, C.A.N., Diaz, J., Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Generalitat Valenciana, U.S. Department of Energy, Ministerio de Economía y Empresa, University of Texas at Arlington, European Regional Development Fund, Ministerio de Ciencia, Innovación y Universidades, McDonald, A.D., Jones, B.J.P., Nygren, D.R., Adams, C., Álvarez-Puerta, Vicente, Azevedo, C.D.R., Benlloch-Rodríguez, J.M., Borges, F.I.G.M., Botas, A., Cárcel García, Sara, Carrión Burguete, José Vicente, Cebrian, S., Conde, C.A.N., Diaz, J., Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, and Toledo Alarcón, José Francisco
Abstract: [EN] A new method to tag the barium daughter in the double-beta decay of Xe-136 is reported. Using the technique of single molecule fluorescent imaging (SMFI), individual barium dication (Ba++) resolution at a transparent scanning surface is demonstrated. A single-step photobleach confirms the single ion interpretation. Individual ions are localized with superresolution (similar to 2 nm), and detected with a statistical significance of 12.9 sigma over backgrounds. This lays the foundation for a new and potentially background-free neutrinoless double-beta decay technology, based on SMFI coupled to high pressure xenon gas time projection chambers.
Published: 2018

23. Investigation of the CRT performance of a PET scanner based in liquid xenon: a Monte Carlo study

Author: Gómez-Cadenas, J. J., Benlloch-Rodriguez, J. M., Ferrario, Paola, Monrabal, F., Rodriguez-Samaniego, Javier, and Toledo Alarcón, José Francisco
Subjects: High sensitivity, TECNOLOGIA ELECTRONICA, PET, TOF, SiPMs, LYSO, Liquid xenon, Energy resolution, Coincidence resolving time (CRT)
Abstract: The measurement of the time of flight of the two 511 keV gammas recorded in coincidence in a PET scanner provides an effective way of reducing the random background and therefore increases the scanner sensitivity, provided that the coincidence resolving time (CRT) of the gammas is sufficiently good. Existing commercial systems based in LYSO crystals, such as the GEMINIS of Philips, reach CRT values of 600 ps (FWHM). In this paper we present a Monte Carlo investigation of the CRT performance of a PET scanner exploiting the scintillating properties of liquid xenon. We find that an excellent CRT of 60 70 ps (depending on the PDE of the sensor) can be obtained if the scanner is instrumented with silicon photomultipliers (SiPMs) sensitive to the ultraviolet light emitted by xenon. Alternatively, a CRT of 120 ps can be obtained instrumenting the scanner with (much cheaper) blue-sensitive SiPMs coated with a suitable wavelength shifter. These results show the excellent time of flight capabilities of a PET device based in liquid xenon., The authors acknowledge support from the following agencies and institutions: the European Research Council (ERC) under the Advanced Grant 339787-NEXT, the Ministerio de Economia y Competitividad and FEDER of Spain, the Severo Ochoa Program SEV-2014-0398 and GVA under grant PROMETEO/2016/120; we acknowledge enlightening discussions with J. Varela and C. Lerche.
Published: 2016
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24. Radiopurity assessment of the energy readout for the NEXT double beta decay experiment

Author: Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Generalitat Valenciana, U.S. Department of Energy, European Research Council, University of Texas at Arlington, European Regional Development Fund, Ministerio de Economía, Industria y Competitividad, Ministerio de Ciencia, Innovación y Universidades, Cebrian, S., Perez, J., Bandac, I., Labarga, L., Álvarez-Puerta, Vicente, Azevedo, C. D. R., Benlloch-Rodriguez, J. M., Borges, F. I. G. M., Botas, A., Carcel, S., Carrión, J.V., Conde, C. A. N., Diaz, J., Diesburg, M., Escada, J., Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Querol-Segura, Marc, Rodriguez-Samaniego, Javier, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Generalitat Valenciana, U.S. Department of Energy, European Research Council, University of Texas at Arlington, European Regional Development Fund, Ministerio de Economía, Industria y Competitividad, Ministerio de Ciencia, Innovación y Universidades, Cebrian, S., Perez, J., Bandac, I., Labarga, L., Álvarez-Puerta, Vicente, Azevedo, C. D. R., Benlloch-Rodriguez, J. M., Borges, F. I. G. M., Botas, A., Carcel, S., Carrión, J.V., Conde, C. A. N., Diaz, J., Diesburg, M., Escada, J., Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Querol-Segura, Marc, Rodriguez-Samaniego, Javier, and Toledo Alarcón, José Francisco
Abstract: [EN] The "Neutrino Experiment with a Xenon Time-Projection Chamber" (NEXT) experiment intends to investigate the neutrinoless double beta decay of 136Xe, and therefore requires a severe suppression of potential backgrounds. An extensive material screening and selection process was undertaken to quantify the radioactivity of the materials used in the experiment. Separate energy and tracking readout planes using different sensors allow us to combine the measurement of the topological signature of the event for background discrimination with the energy resolution optimization. The design of radiopure readout planes, in direct contact with the gas detector medium, was especially challenging since the required components typically have activities too large for experiments demanding ultra-low background conditions. After studying the tracking plane, here the radiopurity control of the energy plane is presented, mainly based on gamma-ray spectroscopy using ultra-low background germanium detectors at the Laboratorio Subterráneo de Canfranc (Spain). All the available units of the selected model of photomultiplier have been screened together with most of the components for the bases, enclosures and windows. According to these results for the activity of the relevant radioisotopes, the selected components of the energy plane would give a contribution to the overall background level in the region of interest of at most 2.4 × 10¿4 counts per keV, kg and year, satisfying the sensitivity requirements of the NEXT experiment.
Published: 2017

25. Secondary scintillation yield of xenon with sub-percent levels of CO2 additive for rare-event detection

Author: Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Generalitat Valenciana, U.S. Department of Energy, Ministerio de Economía y Competitividad, HENRIQUES, C.A., Freitas, E.D.C., Azevedo, C.D.R., González-Díaz, D., Mano, R.D.P., Jorge, M.R., Fernandes, L.M.P., Monteiro, C.M.B., Gómez-Cadenas, J.J., Álvarez-Puerta, Vicente, Benlloch-Rodríguez, J.M., Borges, F.I.G.M., Botas, A., Cárcel García, Sara, Carrión Burguete, José Vicente, Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Querol-Segura, Marc, Rodriguez-Samaniego, Javier, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Generalitat Valenciana, U.S. Department of Energy, Ministerio de Economía y Competitividad, HENRIQUES, C.A., Freitas, E.D.C., Azevedo, C.D.R., González-Díaz, D., Mano, R.D.P., Jorge, M.R., Fernandes, L.M.P., Monteiro, C.M.B., Gómez-Cadenas, J.J., Álvarez-Puerta, Vicente, Benlloch-Rodríguez, J.M., Borges, F.I.G.M., Botas, A., Cárcel García, Sara, Carrión Burguete, José Vicente, Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Querol-Segura, Marc, Rodriguez-Samaniego, Javier, and Toledo Alarcón, José Francisco
Abstract: [EN] Xe-CO2 mixtures are important alternatives to pure xenon in Time Projection Chambers (TPC) based on secondary scintillation (electroluminescence) signal amplification with applications in the important field of rare event detection such as directional dark matter, double electron capture and double beta decay detection. The addition of CO2 to pure xenon at the level of 0.05-0.1% can reduce significantly the scale of electron diffusion from 10 mm/root m to 2.5 mm/root m, with high impact on the discrimination of the events through pattern recognition of the topology of primary ionization trails. We have measured the electroluminescence (EL) yield of Xe-CO2 mixtures, with sub-percent CO2 concentrations. We demonstrate that the EL production is still high in these mixtures, 70% and 35% relative to that produced in pure xenon, for CO2 concentrations around 0.05% and 0.1%, respectively. The contribution of the statistical fluctuations in EL production to the energy resolution increases with increasing CO2 concentration, being smaller than the contribution of the Fano factor for concentrations below 0.1% CO2. (C) 2017 The Author. Published by Elsevier B.V.
Published: 2017

26. Study and design of the front-end and readout electronics for the tracking plane in the NEXT experiment

Author: Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Rodríguez Samaniego, Javier, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, and Rodríguez Samaniego, Javier
Abstract: The NEXT experiment is one of the most innovative ones looking for the neutrinoless double beta decay, which finding will answer one of the most important questions in the last years physics: is the neutrino its own antiparticle? Or in other words, is it a Majorana particle? With that purpose NEXT uses a TPC (Time Projection Chamber) filled with enriched xenon gas at high pressure, and two photosensors planes, one on each end. The first plane contains PMTs (PhotoMultiplier Tube), that collect the light emitted by the xenon when an event happens and precisely measures its energy. The second plane is a SiPM (Silicon PhotoMultiplier) matrix that allows to 3D-reconstruct the event track. Both planes together allows NEXT to have a great background rejection, which makes a difference with the other experiments aiming for the neutrinoless double beta decay. In addition, SiPMs are a new technology which nowadays is evolving to, in the future, displace the classical PMTs. For that reason the study of these sensors starts from zero, as there were not previous uses as pixel-tracking, and lead a new path in the physics detectors, for both high and low energy. This thesis is focused on the study and design of the electronics involving the tracking plane, which includes some technical solutions related also with mechanical issues. From the sensors placed inside the detector, the SiPMs, to the front-end electronic boards, there are few elements on the chain; as the support boards for the SiPMs which must satisfy severe outgassing and radiopurity levels. Also the inner and outer cabling has been designed, focusing on obtaining the best signal-noise ratio; and also the feedthrough for the tracking plane, which solved at low cost the huge problem of taking out about 4000 lines from the pressurized xenon to the outside. Finally, one of the most important elements on this chain and the one that this thesis is focused on, is the front-end board. Starting with the experience acquired wit, El experimento NEXT es uno de los más innovadores en la búsqueda de la desintegración doble beta sin neutrinos, cuyo hallazgo daría con la respuesta a una de las cuestiones más importantes de la física en los últimos años: ¿es el neutrino su propia antipartícula? O dicho de otro modo, ¿es una partícula de Majorana? Para ello NEXT hace uso de una TPC (Time Projection Chamber) llena de gas xenón enriquecido a alta presión, y con dos planos de fotosensores, uno en cada extremo. El primero de ellos está formado por PMTs (Photo Multiplier Tube), que recogen la luz generada por el xenón cuando ocurre un evento, y miden la energía de éste. El segundo consiste en una matriz de SiPMs (Silicon PhotoMultipliers) que permiten reconstruir tridimensionalmente la traza de dicho evento. El conjunto de ambos planos de fotosensores otorga al experimento NEXT un gran rechazo a eventos de fondo, lo que marca la diferencia con otros experimentos en busca de la desintegración doble beta sin neutrinos. Además, los SiPMs son una tecnoloía de reciente aparición que en la actualidad está evolucionando a grandes pasos para, en un futuro, desplazar a los fotomultiplicadores clásicos. Por ello el estudio de estos fotosensores parte prácticamente desde cero, ya que no existen aplicaciones previas de su uso como pixel-tracking, y ha permitido abrir un nuevo camino en los detectores de física, tanto de alta como baja energía. Esta tesis doctoral tiene como objetivo el estudio y diseño de la electrónica involucrada en el plano de reconstrucción de trazas, y que involucran en menor medida dar solución a problemas técnicos de aspecto mecánico. Partiendo de los sensores ubicados dentro del detector, los SiPMs, hasta las tarjetas de front-end, se incluyen varios elementos de la cadena; como son las tarjetas empleadas como soporte para los SiPM en el interior de la cámara, las cuáles deben cumplir rigurosas medidas de radiopureza y degasificación. También se ha diseñado el cableado tanto interno como ex, L'experiment NEXT és un dels més innovadors en la recerca de la desintegració doble beta sense neutrins, i aquesta troballa donaria amb la resposta a una de les quèstions més importants de la física en els últims anys: és el neutrí la seua pròpia antipartícula? O dit d'una altra manera, és una partícula de Majorana? Per açò NEXT fa ús d'una TPC (Time Projection Chamber) plena de gas xenó enriquit a alta presió, i amb dos plànols de fotosensors, un a cada extrem. El primer d'ells està format per PMTs (Photo Multiplier Tube), que arrepleguen la llum generada pel xenó quan ocorre un esdeveniment, i mesuren l'energía d'aquest. El segon consisteix en una matriu de SiPMs (Silicon PhotoMultipliers) que permeten reconstruir tridimensionalment la traça d'aquest esdeveniment. El conjunt de tots dos plànols de fotosensors atorga a l'experiment NEXT un gran rebuig a esdeveniments de fons, la qual cosa marca la diferència amb altres experiments a la recerca de la desintegració doble beta sense neutrins. A més, els SiPMs so'n una tecnología de recent aparició que en l'actualitat està evolucionant a grans passos per a, en un futur, desplaçar als fotomultiplicadors clàssics. Per això l'estudi d'aquests fotosensors part pràcticament des de zero, ja que no hi ha aplicacions prèvies del seu ús com a pixel-tracking, i ha permés obrir un nou camí en els detectors de física, tant d'alta com de baixa energia. Aquesta tesi doctoral té com a objectiu l'estudi i diseny de l'electrònica involucrada en el plànol de reconstrucció de traces, i que involucra en menor mesura donar solució a problemes tècnics d'aspecte mecànic. Partint dels sensors situats dins del detector, els SiPMs, fins a les targetes de front-end, s'inclouen diversos elements de la cadena; com són les targetes emprades com a suport per als SiPMs a l'interior de la càmera, les quals han de complir rigoroses mesures de radioactivitat i degasificació. També s'ha disenyat el cablejat tant intern com extern, fent èmfasi en aconsegu
Published: 2017

27. Supporting Musical Midi Software Through Gesture Interaction for a Natural and Immersive to Use Interface

Author: Toledo Alarcón, José Francisco, Albayrak, Sahin, Wilhelm, Mathias, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Balfagón Ortiga, Bryan, Toledo Alarcón, José Francisco, Albayrak, Sahin, Wilhelm, Mathias, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, and Balfagón Ortiga, Bryan
Abstract: The goal of this bachelor thesis in Telecommunications Systems, Sound and Image engineering at ‘Universidad Politécnica de Valencia’ and supervised in ‘Technische Universität Berlin’ is to develop a gestural interaction prototype to control and support the midi musical software in order to give a more natural and immersive expression to create music. This will take the music to another level allowing an incredible synchronization between human movement and sound, resulting in a higher artistic potential. I will evaluate and study the advantages and limitations of gesture devices to choose the best solution to improve and extend the boundaries in the traditional music expression and creation, En este TFG quiero explorar el desarrollo de un prototipo de interacción gestual para controlar y dar soporte al software midi musical con el fin de encontrar una expresión más natural e inmersiva para crear música. Esto llevará a la música a otro nivel permitiendo una increible sincronización entre hombre y máquina, dando como resultado un potencial artístico más alto. Evaluaré y estudiare los punto fuertes y las limitaciones de los diferentes dispositivos inmersivos para elegir el que mejor de soluciones y mejoras para extender los limites de las tradicionales expresiones musicales. Gestos y movimientos controlarán parámetros y funciones de software como controladores midi.
Published: 2017

28. Uso de reguladores conmutados en PCBs: estudio y validación de buenas prácticas en EMC e Integridad de Señal

Author: Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Jiménez Mirón, José Luis, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, and Jiménez Mirón, José Luis
Abstract: Los requisitos de eficiencia y el aumento del consumo hacen que empleo de reguladores conmutados en los actuales sistemas electrónicos basados en microprocesador sea casi inevitable. Su principal desventaja es ruido (conducido y radiado) que introducen en el propio PCB y en circuitos cercanos, afectando seriamente a las prestaciones del sistema. Esto es especialmente cierto en diseños mixtos digital-analógico. Las recomendaciones (por medio de hojas de datos y notas de apilcación) de integración de estos dispositivos en un PCB no siempre son realizables en la práctica o tienen un coste asociado, creando una incertidumbre al diseñador. El objetivo del presente trabajo es recopilar y discutir estas buenas prácticas y recomendaciones, ponerlas a prueba en PCBs de test y extraer conclusiones que ayuden de guía al diseñador.
Published: 2017

29. Proyecto de ejecución de una instalación de aprovechamiento de energía solar térmica para generación de ACS y de una instalación fotovoltaica para conexión a red

Author: Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Vázquez García, Joan Carles, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, and Vázquez García, Joan Carles
Abstract: El proyecto plantea la aplicación de conocimientos obtenidos por el alumno a: 1. El diseño de una instalación de energía solar térmica para generación de agua caliente sanitaria (A.C.S.) en un edificio de viviendas en Bonrepós y Mirambell (Valencia). 2. El diseño de una instalación solar fotovoltaica de 80kW en Xàtiva (Valencia).  El trabajo a desarrollar por el alumno incluirá los cálculos, estudios, planos, pliegos de condiciones y presupuesto necesarios para el visado del proyecto.
Published: 2017

30. Background rejection in NEXT using deep neural networks

Author: Universitat Politècnica de València. Escuela Técnica Superior de Ingenieros Industriales - Escola Tècnica Superior d'Enginyers Industrials, Universitat Politècnica de València. Escuela Técnica Superior de Ingenieros de Telecomunicación - Escola Tècnica Superior d'Enginyers de Telecomunicació, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, European Commission, Ministerio de Economía y Competitividad, Generalitat Valenciana, U.S. Department of Energy, Ministerio de Ciencia e Innovación, Renner, J., Farbin, A., Muñoz Vidal, J., Benlloch-Rodríguez, J.M., Botas, A., Ferrario, P., Gómez-Cadenas, J.J., Álvarez, V., Azevedo, C.D.R., Borges, F.I.G., Cárcel, S., Carrión, J.V., Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Escuela Técnica Superior de Ingenieros Industriales - Escola Tècnica Superior d'Enginyers Industrials, Universitat Politècnica de València. Escuela Técnica Superior de Ingenieros de Telecomunicación - Escola Tècnica Superior d'Enginyers de Telecomunicació, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, European Commission, Ministerio de Economía y Competitividad, Generalitat Valenciana, U.S. Department of Energy, Ministerio de Ciencia e Innovación, Renner, J., Farbin, A., Muñoz Vidal, J., Benlloch-Rodríguez, J.M., Botas, A., Ferrario, P., Gómez-Cadenas, J.J., Álvarez, V., Azevedo, C.D.R., Borges, F.I.G., Cárcel, S., Carrión, J.V., Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, and Toledo Alarcón, José Francisco
Abstract: [EN] We investigate the potential of using deep learning techniques to reject background events in searches for neutrinoless double beta decay with high pressure xenon time projection chambers capable of detailed track reconstruction. The differences in the topological signatures of background and signal events can be learned by deep neural networks via training over many thousands of events. These networks can then be used to classify further events as signal or background, providing an additional background rejection factor at an acceptable loss of efficiency. The networks trained in this study performed better than previous methods developed based on the use of the same topological signatures by a factor of 1.2 to 1.6, and there is potential for further improvement.
Published: 2017

31. Sensitivity of NEXT-100 to neutrinoless double beta decay

Author: Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, U.S. Department of Energy, European Research Council, European Regional Development Fund, Ministerio de Ciencia e Innovación, Ministerio de Economía y Competitividad, Fundação para a Ciência e a Tecnologia, Portugal, Martín-Albo, J., Muñoz Vidal, J., Ferrario, P., Nebot-Guinot, M., Gomez-Cadenas, J. J., Álvarez-Puerta, Vicente, Azevedo, C.D.R., Borges, F.I.G., Carcel, S., Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Querol, M., Rodriguez-Samaniego, Javier, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, U.S. Department of Energy, European Research Council, European Regional Development Fund, Ministerio de Ciencia e Innovación, Ministerio de Economía y Competitividad, Fundação para a Ciência e a Tecnologia, Portugal, Martín-Albo, J., Muñoz Vidal, J., Ferrario, P., Nebot-Guinot, M., Gomez-Cadenas, J. J., Álvarez-Puerta, Vicente, Azevedo, C.D.R., Borges, F.I.G., Carcel, S., Esteve Bosch, Raul, Herrero Bosch, Vicente, Mora Mas, Francisco José, Querol, M., Rodriguez-Samaniego, Javier, and Toledo Alarcón, José Francisco
Abstract: [EN] NEXT-100 is an electroluminescent high-pressure xenon gas time projection chamber that will search for the neutrinoless double beta (0¿ßß) decay of 136Xe. The detector possesses two features of great value for 0¿ßß searches: energy resolution better than 1% FWHM at the Q value of 136Xe and track reconstruction for the discrimination of signal and background events. This combination results in excellent sensitivity, as discussed in this paper. Material-screening measurements and a detailed Monte Carlo detector simulation predict a background rate for NEXT-100 of at most 4 × 10¿4 counts keV¿1 kg¿1 yr¿1. Accordingly, the detector will reach a sensitivity to the 0¿ßß-decay half-life of 2.8 × 1025 years (90% CL) for an exposure of 100 kg·year, or 6.0 × 1025 years after a run of 3 effective years.
Published: 2016

32. A programmable, multichannel power supply for SiPMs with temperature compensation loop and Ethernet interface

Author: Universitat Politècnica de València. Escuela Técnica Superior de Ingenieros Industriales - Escola Tècnica Superior d'Enginyers Industrials, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Universitat Politècnica de València. Escuela Técnica Superior de Ingenieros de Telecomunicación - Escola Tècnica Superior d'Enginyers de Telecomunicació, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, Ministerio de Economía y Competitividad, University of Texas at Arlington, U.S. Department of Energy, Fundação para a Ciência e a Tecnologia, Portugal, European Commission, Querol-Segura, Marc, Rodriguez-Samaniego, Javier, Toledo Alarcón, José Francisco, Esteve Bosch, Raul, Álvarez-Puerta, Vicente, Herrero Bosch, Vicente, Universitat Politècnica de València. Escuela Técnica Superior de Ingenieros Industriales - Escola Tècnica Superior d'Enginyers Industrials, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Universitat Politècnica de València. Escuela Técnica Superior de Ingenieros de Telecomunicación - Escola Tècnica Superior d'Enginyers de Telecomunicació, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, Ministerio de Economía y Competitividad, University of Texas at Arlington, U.S. Department of Energy, Fundação para a Ciência e a Tecnologia, Portugal, European Commission, Querol-Segura, Marc, Rodriguez-Samaniego, Javier, Toledo Alarcón, José Francisco, Esteve Bosch, Raul, Álvarez-Puerta, Vicente, and Herrero Bosch, Vicente
Abstract: Among the different techniques available, the SiPM power supply described in this paper uses output voltage and sensor temperature feedback. A high-resolution ADC digitizes both the output voltage and an analog signal proportional to the SiPM temperature for each of its 16 independent outputs. The appropriate change in the bias voltage is computed in a micro-controller and this correction is applied via a high resolution DAC to the control input of a DC/DC module that produces the output voltage. This method allows a reduction in gain variations from typically 30% to only 0.5% in a 10ºC range. The power supply is housed in a 3U-height aluminum box. A 2.8 touch screen on the front panel provides local access to the configuration and monitoring functions using a graphical interface. The unit has an Ethernet interface on its rear side to provide remote operation and integration in slow control systems using the encrypted and secure SSH protocol. A LabVIEW application with SSH interface has been designed to operate the power supply from a remote computer. The power supply has good characteristics, such as 85 V output range with 1 mV resolution and stability better than 2 mVP, excellent output load regulation and programmable rise and fall voltage ramps. Commercial power supplies from well-known manufacturers can show far better specifications though can also result in an over featured and over costly solution for typical applications.
Published: 2016

33. Desarrollo de una aplicación web de ayuda a la enseñanza basada en HTML5, CSS3, PHP5 y JavaScript con diseño adaptativo

Author: Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Llopis Balbastre, Lucia, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, and Llopis Balbastre, Lucia
Abstract: El proyecto tiene como objetivo desarrollar una herramienta que permita a un estudiante, desde cualquier dispositivo conectado a internet, acceder a módulos de aprendizaje con contenidos (texto, vídeos, animaciones) y a cuestiones de autoevaluación. Esta herramienta podrá servir de apoyo a docencia presencial o bien permitir el aprendizaje autónomo online. La herramienta tendrá un comportamiento Responsive que consiste en la adaptación a diferentes tamaños y resoluciones de pantalla. Estará programada en PHP, JavaScript, CSS3 y HTML5. El diseño y desarrollo de dicha herramienta se realizará utilizando exclusivamente tecnologías y arquitectura de programación con licencia Open Source para evitar el pago de licencias de software. Este tipo de herramientas se denominan aplicaciones web y solo necesitan un navegador web como Safari, Chrome, Firefox, Explorer, Opera o similar, para funcionar. Las aplicaciones web cada vez son más populares debido al poco consumo de recursos del navegador web como cliente, a la independencia del sistema operativo y a la facilidad para actualizar y mantener la herramienta sin distribuir e instalar software a miles de usuarios. Y por esto mismo, porque solo necesita de un navegador web y una conexión a internet para funcionar, es por lo que se están extendiendo cada vez más en todos los ámbitos, ya que podemos acceder a la aplicación desde cualquier lugar y desde cualquier dispositivo.
Published: 2016

34. Investigation of the CRT performance of a PET scanner based in liquid xenon: a Monte Carlo study

Author: Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, Ministerio de Economía y Competitividad, Generalitat Valenciana, European Regional Development Fund, European Commission, Gómez-Cadenas, J. J., Benlloch-Rodriguez, J. M., Ferrario, Paola, Monrabal, F., Rodriguez-Samaniego, Javier, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, Ministerio de Economía y Competitividad, Generalitat Valenciana, European Regional Development Fund, European Commission, Gómez-Cadenas, J. J., Benlloch-Rodriguez, J. M., Ferrario, Paola, Monrabal, F., Rodriguez-Samaniego, Javier, and Toledo Alarcón, José Francisco
Abstract: The measurement of the time of flight of the two 511 keV gammas recorded in coincidence in a PET scanner provides an effective way of reducing the random background and therefore increases the scanner sensitivity, provided that the coincidence resolving time (CRT) of the gammas is sufficiently good. Existing commercial systems based in LYSO crystals, such as the GEMINIS of Philips, reach CRT values of 600 ps (FWHM). In this paper we present a Monte Carlo investigation of the CRT performance of a PET scanner exploiting the scintillating properties of liquid xenon. We find that an excellent CRT of 60 70 ps (depending on the PDE of the sensor) can be obtained if the scanner is instrumented with silicon photomultipliers (SiPMs) sensitive to the ultraviolet light emitted by xenon. Alternatively, a CRT of 120 ps can be obtained instrumenting the scanner with (much cheaper) blue-sensitive SiPMs coated with a suitable wavelength shifter. These results show the excellent time of flight capabilities of a PET device based in liquid xenon.
Published: 2016

35. Readout and Data Acquisition in the NEXT-NEW Detector based on SRS-ATCA

Author: Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Esteve Bosch, Raul, Toledo Alarcón, José Francisco, Rodriguez, Javier, Querol, Marc, Alvarez, Vicente, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Esteve Bosch, Raul, Toledo Alarcón, José Francisco, Rodriguez, Javier, Querol, Marc, and Alvarez, Vicente
Abstract: The Scalable Readout System (SRS) was defined by the CERN RD51 Collaboration as a multi-channel, scalable readout platform for a wide range of front ends. In 2014, SRS was ported to the ATCA (Advanced Telecommunications Computing Architecture) standard. NEXT is an underground experiment aimed at searching for neutrinoless double-beta decay. NEXT-DEMO, a small-scale demonstrator, was read-out using SRS. NEXT has adopted SRS-ATCA for its first stage, called NEXT-NEW. Our presentation will describe the readout, DAQ and trigger for NEXT-NEW based on SRS-ATCA. This is, to our knowledge, the first experiment operating entirely on SRS-ATCA.
Published: 2016

36. Power saving and energy optimization techniques for Wireless Sensor Networks

Author: Sendra Compte, Sandra, Lloret, Jaime, García Pineda, Miguel, and Toledo Alarcón, José Francisco
Subjects: Energy consumption, TECNOLOGIA ELECTRONICA, Network communication protocols, TEORIA DE LA SEÑAL Y COMUNICACIONES, Energy management, INGENIERIA TELEMATICA, Power-saving strategies, Wireless sensor networks
Abstract: Wireless sensor networks have become increasingly popular due to their wide range of applications. Energy consumption is one of the biggest constraints of the wireless sensor node and this limitation combined with a typical deployment of large number of nodes have added many challenges to the design and management of wireless sensor networks. They are typically used for remote environment monitoring in areas where providing electrical power is difficult. Therefore, the devices need to be powered by batteries and alternative energy sources. Because battery energy is limited, the use of different techniques for energy saving is one of the hottest topics in WSNs. In this work, we present a survey of power saving and energy optimization techniques for wireless sensor networks, which enhances the ones in existence and introduces the reader to the most well known available methods that can be used to save energy. They are analyzed from several points of view: Device hardware, transmission, MAC and routing protocols.
Published: 2011
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37. Diseño, validación y producción de amplificadores previos de audio con DSP y conectividad USB y Ethernet en la empresa Equipson S.A

Author: Toledo Alarcón, José Francisco, Pérez Fenollosa, Olegario, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Canet Carbonell, Xesc, Toledo Alarcón, José Francisco, Pérez Fenollosa, Olegario, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, and Canet Carbonell, Xesc
Abstract: El presente proyecto se realiza en el marco de prácticas extracurriculares en empresa, por tanto se trata de un proyecto encargado por la empresa al alumno. Este proyecto consiste en la realización de una serie de 3 placas de circuito impreso encargadas por una tercera empresa extranjera también del ámbito de la electrónica de audio a Equipson S.A. Dicha empresa diseña y comercializa amplificadores de potencia de gama profesional. Estas placas serán el paso intermedio entre el conector de señal de audio de entrada y la salida de señal hacia el módulo de potencia. Las placas incorporan un DSP para poder realizar procesado de la señal, y toda la electrónica necesaria para las etapas correspondientes de acondicionamiento de señal a los niveles requeridos por las etapas de potencia. Se realizará también una tercera placa (MCU Master Control Unit) para poder dotar de conectividad a las etapas de previo y poder controlar el DSP. Esta placa contendrá un microcontrolador y será capaz de manejar el DSP a través de Ethernet y USB mediante el software WorkCAD, desarrollado por EQUIPSON S.A., This project is carried out in the framework of extracurricular work experience, therefore it is a project commissioned by the company to the student. This project involves conducting a series of 3 PCB commissioned by third foreign company also in the field of audio electronics Equipson SA This company designs and markets professional power amplifiers range. These plates will be the intermediate step between the signal connector audio input and output signal to the power module. The plates feature a DSP to perform signal processing, and all the necessary electronics for the corresponding signal conditioning stage at the levels required by the power stages. Third plate (MCU Master Control Unit) will also be made to provide connectivity to the stages of pre and to control the DSP. This board contains a microcontroller and be able to handle the DSP via Ethernet and USB by WorkCAD software, developed by Equipson SA
Published: 2015

38. PMT calibration of a scintillation detector using primary scintillation

Author: Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Universitat Politècnica de València. Departamento de Mecánica de los Medios Continuos y Teoría de Estructuras - Departament de Mecànica dels Medis Continus i Teoria d'Estructures, Ministerio de Ciencia e Innovación, Fundação para a Ciência e a Tecnologia, Portugal, European Research Council, Freitas, E. D. C., Fernandes, L. M. P., Yahlali, N., Perez, J., Alvarez, V., Borges, F. I. G., Camargo, M., Carcel, S., Cebrian, S., Esteve Bosch, Raul, Marí Romero, Antonio Francisco, Mora Mas, Francisco José, Pérez Aparicio, José Luis, Rodríguez Samaniego, Javier, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Universitat Politècnica de València. Departamento de Mecánica de los Medios Continuos y Teoría de Estructuras - Departament de Mecànica dels Medis Continus i Teoria d'Estructures, Ministerio de Ciencia e Innovación, Fundação para a Ciência e a Tecnologia, Portugal, European Research Council, Freitas, E. D. C., Fernandes, L. M. P., Yahlali, N., Perez, J., Alvarez, V., Borges, F. I. G., Camargo, M., Carcel, S., Cebrian, S., Esteve Bosch, Raul, Marí Romero, Antonio Francisco, Mora Mas, Francisco José, Pérez Aparicio, José Luis, Rodríguez Samaniego, Javier, and Toledo Alarcón, José Francisco
Abstract: We have studied the calibration of PMTs in scintillation detectors, inducing single electron response on the PMT from primary scintillation produced by x-ray interaction. The results agree with those obtained by the commonly used single electron response (SER) method, which uses LED light pulses to induce the PMT SER. The use of the primary scintillation for PMT calibration will be convenient in situations where the PMT is already in situ, when it becomes difficult or even impossible to apply the SER method, e.g. in commercial sealed scintillator/PMT devices. Furthermore, we have experimentally investigated the possibility of fitting the high-charge tail of the PMT SER pulse-height distribution to an exponential function, inferring the PMT gain from the inverse of the exponent. The results of the exponential fit method agree with those obtained by the SER method for pulse-height distributions resulting from an average number of around 1.0 photoelectrons reaching the first dynode per light/scintillation pulse. The SER method has higher precision and, therefore, is used in a larger number of applications. Nevertheless, the exponential fit method will be useful in situations where the single photoelectron peak is under the background or noise peak and it may present an alternative, simple way, for relative gain calibration of PMT arrays as well as for monitoring the PMT gain variations.
Published: 2015

39. Diseño e implementación de un theremin digital

Author: Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, Dávila Briones, Víctor Enrique, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, and Dávila Briones, Víctor Enrique
Abstract: Este trabajo presenta el diseño e implementación de un theremin digital, controlado mediante sensores de ultrasonidos y con toda la electrónica integrada en un procesador digital de señales DSP de Analog Devices; alejándonos de este modo de los clásicos diseños analógicos basados en tubos de vacío y posteriormente en transistores. Tomando como punto de partida un diseño previo del autor que combinaba sensores de ultrasonidos con microcontroladores de 8 bits, se pretende conseguir un instrumento musical tanto más liviano como potente., This work presents the design and implementation of a digital theremin, controlled by ultrasonic sensors and implemented on an Analog Devices Digital Signal Processor. In this way we supersede the classic analog designs. This work continues an earlier design by the student which combined ultrasonic sensors and 8-bit microcontrollers, and so we intend to get a more compact and powerful musical instrument.
Published: 2015

40. Comunicación Bluetooth entre Arduino UNO y Android aplicado a un detector de mentiras

Author: Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Biendicho Lletí, Fidel, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, and Biendicho Lletí, Fidel
Abstract: Vamos a realizar un proyecto en el que utilizaremos una placa Arduino UNO, un sensor de ritmo cardiaco llamado Pulse Sensor, un módulo Bluetooth para la placa Arduino llamado HC-05 y además desarrollaremos una aplicación para el sistema operativo Android. Con todo esto lo que pretendemos es realizar un detector de mentiras. Calcularemos con Arduino las pulsaciones que tiene la persona y las enviaremos vía Bluetooth a un teléfono móvil que tenga la aplicación, y esta será la encargada de verificar si la persona está diciendo una verdad o una mentira., We will develop a project that uses an Arduino UNO, a heart rate sensor called Pulse Sensor and a Bluetooth module for Arduino called HC-05. We will develop an application for the Android operating system. The goal is to build a simple lie detector. Arduino calculates the heart beat rate and sends it via Bluetooth to a mobile phone that has the application, which will verify whether the person is telling the truth or a lie.
Published: 2015

41. The front-end electronics for the 1.8-kchannel SiPM tracking plane in the NEW detector

Author: Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, European Commission, U.S. Department of Energy, Fundação para a Ciência e a Tecnologia, Portugal, Ministerio de Ciencia e Innovación, Rodríguez, Javier, Toledo Alarcón, José Francisco, Esteve Bosch, Raul, Lorca, D., Monrabal, F., Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, European Commission, U.S. Department of Energy, Fundação para a Ciência e a Tecnologia, Portugal, Ministerio de Ciencia e Innovación, Rodríguez, Javier, Toledo Alarcón, José Francisco, Esteve Bosch, Raul, Lorca, D., and Monrabal, F.
Abstract: [EN] NEW is the first phase of NEXT-100 experiment, an experiment aimed at searching for neutrinoless double-beta decay. NEXT technology combines an excellent energy resolution with tracking capabilities thanks to a combination of optical sensors, PMTs for the energy measurement and SiPMs for topology reconstruction. Those two tools result in one of the highest background rejection potentials in the field. This work describes the tracking plane that will be constructed for the NEW detector which consists of close to 1800 sensors with a 1-cm pitch arranged in twenty- eight 64-SiPM boards. Then it focuses in the development of the electronics needed to read the 1800 channels with a front-end board that includes per-channel differential transimpedance input amplifier, gated integrator, automatic offset voltage compensation and 12-bit ADC. Finally, a de- scription of how the FPGA buffers data, carries out zero suppression and sends data to the DAQ interface using CERN RD-51 SRS s DTCC link specification complements the description of the electronics of the NEW detector tracking plane.
Published: 2015

42. Radiopurity assessment of the tracking readout for the NEXT double beta decay experiment

Author: Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Departamento de Mecánica de los Medios Continuos y Teoría de Estructuras - Departament de Mecànica dels Medis Continus i Teoria d'Estructures, U.S. Department of Energy, Fundação para a Ciência e a Tecnologia, Portugal, European Commission, Cebrian, S., Perez, J., Bandac, I., Labarga, L., Alvarez, V., Barrado, A. I., Bettini, A., Borges, F. I. G. M., Camargo, M., Carcel, S., Cervera, A., Conde, C. A. N., Conde, E., Dafni, T Diaz, J., Esteve Bosch, Raul, Fernandes, L. M. P., Fernandez, M., Ferrario, P., Ferreira, A. L., Freitas, E. D. C., Gehman, V. M., Goldschmidt, A., Gomez-Cadenas, J. J., Gonzalez-Diaz, D., Gutierrez, R. M., Hauptman, J., Hernando Morata, J. A., Herrera, D. C., Irastorza, I. G., Laing, A., Liubarsky, I., Lopez-March, N., Lorca, D., Losada, M., Luzon, G., Marí Peláez, Antonio, Martin-Albo, J., Martinez, A., Martinez-Lema, G., Miller, T., Monrabal, F., Monserrate, M., Monteiro, C. M. B., Mora Mas, Francisco José, Moutinho, L. M., Munoz Vidal, J., Nebot-Guinot, M., Nygren, D., Oliveira, C. A. B., Ortiz de Solorzano, A., Pérez Aparicio, José Luis, Querol, M., Renner, J., Ripoll, L., Rodriguez, J., Santos, F. P., dos Santos, J. M. F., Serra, L., Shuman, D., Simon, A., Sofka, C., Sorel, M., Toledo Alarcón, José Francisco, Torrent, J., Tsamalaidze, Z., Veloso, J. F. C. A., Villar, J. A., Webb, R. C., White, J. T., Yahlali, N., Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Departamento de Mecánica de los Medios Continuos y Teoría de Estructuras - Departament de Mecànica dels Medis Continus i Teoria d'Estructures, U.S. Department of Energy, Fundação para a Ciência e a Tecnologia, Portugal, European Commission, Cebrian, S., Perez, J., Bandac, I., Labarga, L., Alvarez, V., Barrado, A. I., Bettini, A., Borges, F. I. G. M., Camargo, M., Carcel, S., Cervera, A., Conde, C. A. N., Conde, E., Dafni, T Diaz, J., Esteve Bosch, Raul, Fernandes, L. M. P., Fernandez, M., Ferrario, P., Ferreira, A. L., Freitas, E. D. C., Gehman, V. M., Goldschmidt, A., Gomez-Cadenas, J. J., Gonzalez-Diaz, D., Gutierrez, R. M., Hauptman, J., Hernando Morata, J. A., Herrera, D. C., Irastorza, I. G., Laing, A., Liubarsky, I., Lopez-March, N., Lorca, D., Losada, M., Luzon, G., Marí Peláez, Antonio, Martin-Albo, J., Martinez, A., Martinez-Lema, G., Miller, T., Monrabal, F., Monserrate, M., Monteiro, C. M. B., Mora Mas, Francisco José, Moutinho, L. M., Munoz Vidal, J., Nebot-Guinot, M., Nygren, D., Oliveira, C. A. B., Ortiz de Solorzano, A., Pérez Aparicio, José Luis, Querol, M., Renner, J., Ripoll, L., Rodriguez, J., Santos, F. P., dos Santos, J. M. F., Serra, L., Shuman, D., Simon, A., Sofka, C., Sorel, M., Toledo Alarcón, José Francisco, Torrent, J., Tsamalaidze, Z., Veloso, J. F. C. A., Villar, J. A., Webb, R. C., White, J. T., and Yahlali, N.
Abstract: The Neutrino Experiment with a Xenon Time-Projection Chamber (NEXT) is intended to investigate the neutrinoless double beta decay of 136Xe, which requires a severe suppression of potential backgrounds; therefore, an extensive screening and selection process is underway to control the radio-purity levels of the materials to be used in the experimental set-up of NEXT. The detector design combines the measurement of the topological signature of the event for background discrimination with the energy resolution optimization. Separate energy and tracking readout planes are based on different sensors: photomultiplier tubes for calorimetry and silicon multi-pixel photon counters for tracking. The design of a radio pure tracking plane, in direct contact with the gas detector medium, was a challenge since the needed components have typically activities too large for experiments requiring ultra-low background conditions. Here, the radiopurity assessment of tracking readout components based on gamma-ray spectroscopy using ultra-low background germanium detectors at the Laboratorio Subterráneo de Canfranc (Spain) is described. According to the obtained results, radiopure enough printed circuit boards made of kapton and copper and silicon photomultipliers.
Published: 2015

43. Desarrollo de una aplicación de control en Windows XP para un dispositivo USB externo con aplicación al test de receptores de Televisión Digital en la empresa Tecatel

Author: Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Foz Aguilar, Daniel, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, and Foz Aguilar, Daniel
Abstract: Este proyecto nace del interésa de la empresa Tecatel de monitorizar un receptor de televisiñón digital terrestre (set-top box, STB). Está incluido en un proyecto dividido en tres partes. La primera consistente en el diseño de un módulo electrónico de interfaz basado en microcontrolador, la segunda realizar el Firmware del módulo electrónico, y la tercera, que es la que trata esta memoria, consistente en el desarrollo de una aplicación Software, y un controlador para Windows XP.
Published: 2015

44. Accurate gamma and MeV-electron track reconstruction with an ultra-low diffusion Xenon/TMA TPC at 10 atm

Author: Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Departamento de Mecánica de los Medios Continuos y Teoría de Estructuras - Departament de Mecànica dels Medis Continus i Teoria d'Estructures, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, U.S. Department of Energy, Fundação para a Ciência e a Tecnologia, Portugal, European Commission, Gonzalez Diaz, Diego, Álvarez Puerta, Vicente, Borges, F. I. G., Camargo, M., Carcel, S., Cebrian, S., Cervera, A., Conde, C. A. N., Dafni, T., Esteve Bosch, Raul, Fernandes, L. M. P., Mora Mas, Francisco José, Pérez Aparicio, José Luis, Rodríguez Samaniego, Javier, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Departamento de Mecánica de los Medios Continuos y Teoría de Estructuras - Departament de Mecànica dels Medis Continus i Teoria d'Estructures, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, U.S. Department of Energy, Fundação para a Ciência e a Tecnologia, Portugal, European Commission, Gonzalez Diaz, Diego, Álvarez Puerta, Vicente, Borges, F. I. G., Camargo, M., Carcel, S., Cebrian, S., Cervera, A., Conde, C. A. N., Dafni, T., Esteve Bosch, Raul, Fernandes, L. M. P., Mora Mas, Francisco José, Pérez Aparicio, José Luis, Rodríguez Samaniego, Javier, and Toledo Alarcón, José Francisco
Abstract: We report the performance of a 10 atm Xenon/trimethylamine time projection chamber (TPC) for the detection of X-rays (30 keV) and gamma-rays (0.511-1.275 MeV) in conjunction with the accurate tracking of the associated electrons. When operated at such a high pressure and in similar to 1%-admixtures, trimethylamine (TMA) endows Xenon with an extremely low electron diffusion (1.3 +/- 0.13 mm-sigma (longitudinal), 0.95 +/- 0.20 mm-sigma (transverse) along 1 m drift) besides forming a convenient Penning-Fluorescent' mixture. The TPC, that houses 1.1 kg of gas in its fiducial volume, operated continuously for 100 live-days in charge amplification mode. The readout was performed through the recently introduced microbulk Micromegas technology and the AFTER chip, providing a 3D voxelization of 8 mm x 8 mm x 1.2 mm for approximately 10 cm/MeV-long electron tracks. Resolution in energy (epsilon) at full width half maximum (R) inside the fiducial volume ranged from R = 14.6% (30 keV) to R = 4.6% (1.275 MeV). This work was developed as part of the R&D program of the NEXT collaboration for future detector upgrades in the search of the neutrino-less double beta decay (beta beta 0 nu) in Xe-136, specifically those based on novel gas mixtures. Therefore we ultimately focus on the calorimetric and topological properties of the reconstructed MeV-electron tracks. In particular, the obtained energy resolution has been decomposed in its various contributions and improvements towards achieving the R =1.4%root MeV/epsilon levels obtained in small sensors are discussed
Published: 2015

45. An improved measurement of electron-ion recombination in high-pressure xenon gas

Author: Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Universitat Politècnica de València. Departamento de Mecánica de los Medios Continuos y Teoría de Estructuras - Departament de Mecànica dels Medis Continus i Teoria d'Estructures, Ministerio de Ciencia e Innovación, Ministerio de Economía y Competitividad, U.S. Department of Energy, Fundação para a Ciência e a Tecnologia, Portugal, European Commission, Serra, L., Sorel, M., Alvarez, V., Borges, F. I. G., Camargo, M., Carcel, S., Cebrian, S., Cervera, A., Conde, C. A. N., Dafni, T., Diaz, J., Esteve Bosch, Raul, Marí Romero, Antonio Francisco, Mora Mas, Francisco José, Pérez Aparicio, José Luis, Querol Galve, Marcos, Toledo Alarcón, José Francisco, Webb, Rachel, Yahlali Haddou, Nadia, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Universitat Politècnica de València. Departamento de Mecánica de los Medios Continuos y Teoría de Estructuras - Departament de Mecànica dels Medis Continus i Teoria d'Estructures, Ministerio de Ciencia e Innovación, Ministerio de Economía y Competitividad, U.S. Department of Energy, Fundação para a Ciência e a Tecnologia, Portugal, European Commission, Serra, L., Sorel, M., Alvarez, V., Borges, F. I. G., Camargo, M., Carcel, S., Cebrian, S., Cervera, A., Conde, C. A. N., Dafni, T., Diaz, J., Esteve Bosch, Raul, Marí Romero, Antonio Francisco, Mora Mas, Francisco José, Pérez Aparicio, José Luis, Querol Galve, Marcos, Toledo Alarcón, José Francisco, Webb, Rachel, and Yahlali Haddou, Nadia
Abstract: We report on results obtained with the NEXT-DEMO prototype of the NEXT-100 high-pressure xenon gas time projection chamber (TPC), exposed to an alpha decay calibration source. Compared to our previous measurements with alpha particles, an upgraded detector and improved analysis techniques have been used. We measure event-by-event correlated fluctuations between ionization and scintillation due to electron-ion recombination in the gas, with correlation coeffcients between -0.80 and -0.56 depending on the drift field conditions. By combining the two signals, we obtain a 2.8% FWHM energy resolution for 5.49 MeV alpha particles and a measurement of the optical gain of the electroluminescent TPC. The improved energy resolution also allows us to measure the specific activity of the radon in the gas due to natural impurities. Finally, we measure the average ratio of excited to ionized atoms produced in the xenon gas by alpha particles to be 0:561 0:045, translating into an average energy to produce a primary scintillation photon ofWex = (39:2 3:2) eV.
Published: 2015

46. Desarrollo de una interfaz entre el módulo FEC del experimento NEXT y el módulo FEC del experimento T2K

Author: Toledo Alarcón, José Francisco, Esteve Bosch, Raul, Universitat Politècnica de València. Servicio de Alumnado - Servei d'Alumnat, Tarazona Tárrega, Rafael, Toledo Alarcón, José Francisco, Esteve Bosch, Raul, Universitat Politècnica de València. Servicio de Alumnado - Servei d'Alumnat, and Tarazona Tárrega, Rafael
Abstract: [EN] Development of an interface between the NEXT experiment's FEC module and T2K experiment's FEC module., [ES] Desarrollo de una interfaz entre el módulo FEC del experimento NEXT y el módulo FEC del experimento T2K.
Published: 2014

47. A point-to-point link for data, trigger, clock and control over copper or fibre

Author: Universitat Politècnica de València. Instituto Universitario de Aplicaciones de las Tecnologías de la Información - Institut Universitari d'Aplicacions de les Tecnologies de la Informació, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Tarazona Martínez, Alfonso, Gnanvo, K., Martoiu, S., Muller, H., Toledo Alarcón, José Francisco, Universitat Politècnica de València. Instituto Universitario de Aplicaciones de las Tecnologías de la Información - Institut Universitari d'Aplicacions de les Tecnologies de la Informació, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Tarazona Martínez, Alfonso, Gnanvo, K., Martoiu, S., Muller, H., and Toledo Alarcón, José Francisco
Abstract: Upgrades of the LHC detectors target significantly higher event rates and higher bandwidth over point-to-point links. The Data, Trigger, Clock and Control (DTCC) is a new custom link protocol for data and control streams over different physical media, as copper or optical fibre. The DTCC link is implemented over 8b10b encoding. A version of the DTCC link over standard Category 6 cables is planned to be used with ALICE EMCal Calorimeters after its LS1 upgrade with a significant increase of the readout rate.
Published: 2014

48. Present status and future perspectives of the NEXT experiment

Author: Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Universitat Politècnica de València. Departamento de Mecánica de los Medios Continuos y Teoría de Estructuras - Departament de Mecànica dels Medis Continus i Teoria d'Estructures, Ministerio de Economía y Competitividad, U.S. Department of Energy, Fundação para a Ciência e a Tecnologia, Portugal, Ministerio de Ciencia e Innovación, Gómez Cadenas. J.J., Álvarez, V., Borges, F.I.G., Cárcel, S., Castel, J., Cebrián, S., Cerverá, A., Conde, C.A.N., Dafni, T., Dias, T.H.V.T., Díaz, J., Egorov, M., Esteve Bosch, Raul, Evtoukhovitch, P., Fernandes, L.M.P., Ferrario, P., Ferreira, A.L., Freitas, E.D.C., Gehman, V.M., Gil, A., Goldschmidt, A., Gómez, H., González Díaz, D., Gutiérrez, R.M., Hauptman, J., Hernando Morata, J.A., Herrera, D.C., Iguaz, F.J., Irastorza, J.G., Jinete, M.A., Labarga, L., Laig, A., Liubarsky, I., Lopez, J.A.M., Lorca, D., Losada, M., Luzón, M., Marí Romero, Antonio Francisco, Martín Albo, J., Martínez, A., Miller, T., Moissenko, A., Monrabal, F., Monserrate, M., Monteiro, C.M.B, Mora Mas, Francisco José, Moutinho, L.M., Muñoz Vidal, J., Natal da Luz, H., Navarro, G., Nebot Guínot, M., Nygren, D., Oliviera, C.A.B., Palma, R., Pérez, Javier, Pérez Aparicio, José Luis, Renner, J., Ripoll, L., Rodríguez, A., Rodríguez, J., Santos, F.P., Dos Santos, J.M.F., Seguí, L., Serra, L., Shuman, D., Simón, A., Sofka, C., Sorel, M., Toledo Alarcón, José Francisco, Tomás, A., Torrent, J., Tsamalaidze, Z., Veloso, J.F.C.A., Villar, J.A., Webb, R., White, J., Yahlali Haddou, Nadia, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, Universitat Politècnica de València. Departamento de Mecánica de los Medios Continuos y Teoría de Estructuras - Departament de Mecànica dels Medis Continus i Teoria d'Estructures, Ministerio de Economía y Competitividad, U.S. Department of Energy, Fundação para a Ciência e a Tecnologia, Portugal, Ministerio de Ciencia e Innovación, Gómez Cadenas. J.J., Álvarez, V., Borges, F.I.G., Cárcel, S., Castel, J., Cebrián, S., Cerverá, A., Conde, C.A.N., Dafni, T., Dias, T.H.V.T., Díaz, J., Egorov, M., Esteve Bosch, Raul, Evtoukhovitch, P., Fernandes, L.M.P., Ferrario, P., Ferreira, A.L., Freitas, E.D.C., Gehman, V.M., Gil, A., Goldschmidt, A., Gómez, H., González Díaz, D., Gutiérrez, R.M., Hauptman, J., Hernando Morata, J.A., Herrera, D.C., Iguaz, F.J., Irastorza, J.G., Jinete, M.A., Labarga, L., Laig, A., Liubarsky, I., Lopez, J.A.M., Lorca, D., Losada, M., Luzón, M., Marí Romero, Antonio Francisco, Martín Albo, J., Martínez, A., Miller, T., Moissenko, A., Monrabal, F., Monserrate, M., Monteiro, C.M.B, Mora Mas, Francisco José, Moutinho, L.M., Muñoz Vidal, J., Natal da Luz, H., Navarro, G., Nebot Guínot, M., Nygren, D., Oliviera, C.A.B., Palma, R., Pérez, Javier, Pérez Aparicio, José Luis, Renner, J., Ripoll, L., Rodríguez, A., Rodríguez, J., Santos, F.P., Dos Santos, J.M.F., Seguí, L., Serra, L., Shuman, D., Simón, A., Sofka, C., Sorel, M., Toledo Alarcón, José Francisco, Tomás, A., Torrent, J., Tsamalaidze, Z., Veloso, J.F.C.A., Villar, J.A., Webb, R., White, J., and Yahlali Haddou, Nadia
Abstract: [EN] NEXT is an experiment dedicated to neutrinoless double beta decay searches in xenon. The detector is a TPC, holding 100 kg of high-pressure xenon enriched in the 136Xe isotope. It is under construction in the Laboratorio Subterráneo de Canfranc in Spain, and it will begin operations in 2015. The NEXT detector concept provides an energy resolutionbetter than 1% FWHM and a topological signal that can be used to reduce the background. Furthermore, the NEXT technology can be extrapolated to a 1 ton-scale experiment.
Published: 2014

49. Diseño y producción de un cambio de marchas automático para automoción con detección de posición por campo magnético

Author: Toledo Alarcón, José Francisco, Márquez de la Torre, Manuel, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, García Safont, Rubén, Toledo Alarcón, José Francisco, Márquez de la Torre, Manuel, Universitat Politècnica de València. Departamento de Ingeniería Electrónica - Departament d'Enginyeria Electrònica, Universitat Politècnica de València. Escuela Politécnica Superior de Gandia - Escola Politècnica Superior de Gandia, Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular, and García Safont, Rubén
Abstract: En los últimos años se está asistiendo a un desarrollo espectacular del conjunto de tecnologías que incorporan los automóviles, todas ellas dominadas por la presencia de múltiples sistemas electrónicos y automáticos cada vez más sofisticados que han ido dejando obsoletos los sistemas más tradicionales utilizados en los inicios de la automoción. Coincidiendo con el desarrollo tecnológico de la electrónica y los nuevos materiales, ha tenido lugar una verdadera revolución en el sector de la fabricación de automóviles. Las nuevas tecnologías permiten incorporar de serie y a coste relativamente bajo prestaciones que o bien antes no eran posibles por falta de desarrollo tecnológico o bien eran prohibitivas por su elevado coste. Hoy por hoy, cualquier usuario de un vehículo está familiarizado con términos como sistema antibloqueo de frenos, elevalunas eléctricos, dirección asistida, control electrónico de tracción, sistema de climatización, entre otros muchos. Pues bien, en este nuevo concepto de automóvil, en el que destaca por encima de todo, la seguridad y el confort, cobra especial interés el cambio de marchas automático y su interfaz con el usuario, el cual es el motivo para la realización de este proyecto. Todos los vehículos del mercado constan con dos tipos de cambios de marchas posibles, manuales y automáticos y dentro de estas dos tipos existen los cambios accionados mecánicamente o electrónicamente. Los cambios mecánicos penalizan en tamaño, ya que son más voluminosos y requieren más espacio para su instalación además de un túnel desde el cambio hasta el motor. Los cambios mecánicos son económicos en la fabricación pero caros en el proceso ya que se penaliza mucho el tiempo de montaje, con lo que el cambio electrónico es la opción perfecta. El proyecto “Diseño y producción de un cambio de Marchas automático para automoción con detección de posición por campo magnético” consiste en un proyecto de los diferentes departamentos de la empresa FICOSA INTERNACIONAL
Published: 2014

50. Desarrollo de una interfaz entre el módulo FEC del experimento NEXT y el módulo FEC del experimento T2K

Author: Esteve Bosch, Raul, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Servicio de Alumnado - Servei d'Alumnat, Tarazona Tárrega, Rafael, Esteve Bosch, Raul, Toledo Alarcón, José Francisco, Universitat Politècnica de València. Servicio de Alumnado - Servei d'Alumnat, and Tarazona Tárrega, Rafael
Abstract: [EN] Development of an interface to the NEXT experiment's FEC module and T2K experiment's FEC module., [ES] Desarrollo de una interfaz entre el módulo FEC del experimento NEXT y el módulo FEC del experimento T2K.
Published: 2014

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