Persona: Sanz, Ruy
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Instituto Nacional de Técnica Aeroespacial
El Instituto Nacional de Técnica Aeroespacial es el Organismo Público de Investigación (OPI) dependiente del Ministerio de Defensa. Además de realizar actividades de investigación científica y de desarrollo de sistemas y prototipos en su ámbito de conocimiento, presta servicios tecnológicos a empresas, universidades e instituciones.
El INTA está especializado en la investigación y el desarrollo tecnológico, de carácter dual, en los ámbitos de la Aeronáutica, Espacio, Hidrodinámica, Seguridad y Defensa.
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Sanz
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Ruy
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Publicación Acceso Abierto Gamma Irradiation of Magnetoresistive Sensors for Planetary Exploration(Multidisciplinary Digital Publishing Institute (MDPI), 2012-04-02) Sanz, Ruy; Fernández, A. B.; Domínguez, J. A.; Martín Vodopivec, B.; Díaz Michelena, MarinaA limited number of Anisotropic Magnetoresistive (AMR) commercial-off-the-shelf (COTS) magnetic sensors of the HMC series by Honeywell, with and without integrated front-end electronics, were irradiated with gamma rays up to a total irradiation dose of 200 krad (Si), following the ESCC Basic Specification No. 22900. Due to the magnetic cleanliness required for these tests a special set-up was designed and successfully employed. Several parameters of the sensors were monitored during testing and the results are reported in this paper. The authors conclude that AMR sensors without front-end electronics seem to be robust against radiation doses of up to 200 krad (Si) with a dose rate of 5 krad (Si)/hour and up to a resolution of tens of nT, but sensors with an integrated front-end seem to be more vulnerable to radiation.Publicación Acceso Abierto MOURA magnetometer for Mars MetNet Precursor Mission. Its potential for an in situ magnetic environment and surface characterization(Universidad Complutense de Madrid, 2016-10-14) Díaz Michelena, Marina; Sanz, Ruy; Belén Fernández, A.; De Manuel, V.; Cerdán, M. F.; Apéstigue, Víctor; Domínguez, J. A.; González, Miguel; Guerrero, H.; Dolores Sabau, M.; Kilian, R.; Baeza, O.; Ríos, F.; Herraiz, M.; Vázquez, L.; Tordesillas, J. M.; Covisa, P.; Aguado, J.; Ministerio de Economía y Competitividad (MINECO)El magnetómetro y gradiómetro MOURA forma parte de la instrumentación científica de la misión precursora de MetNet a Marte. En este trabajo se describen los objetivos de esta investigación, se recopilan las tareas de diseño y desarrollo del mismo así como su posterior calibración y se muestran las principales acciones de demostración emprendidas con el instrumento que muestran su capacidad para medidas magnéticas a bordo de aterrizadores y rovers. MOURA magnetometer and gradiometer is part of the scientific instrumentation for Mars MetNet Precursor mission. This work describes the objective of the investigation, summarizes the work done in the design and development of the sensor as well as its calibration, and shows the demonstration campaigns to show the potential of such instrument for planetary landers and roversPublicación Restringido Temperature Dependent Magnetization and Remanent Magnetization in Pseudo-Binary x (Fe2TiO4)-(1-x)(Fe3O4) (0.30 < x < 1.00) Titanomagnetites(Institute of Electrical and Electronics Engineers, 2011-09-26) Sanz, Ruy; Cerdán, M. F.; Wise, A.; Díaz Michelena, MarinaIn this work we present preliminary results on magnetization and remanence of synthetic pseudo-binary x(Fe 2 TiO 4 )-(1-x)(Fe 3 O 4 )(0.30 <; x <; 1.00). Magnetic characterization was performed at temperature ranges from 100 K up to 400 K. The final objective is to characterize the magnetic response as a function of temperature in order to foresight the future magnetic measurements of the magnetometer included into Met-Net mission to Mars. Samples present ferromagnetic behavior with Néel temperatures above the minimum Martian temperature. An increased remanence for sample with x=0.65 has been measured possibly originated by pinning mechanism which might offer a partial explanation as to the crustal magnetism of Mars.Publicación Acceso Abierto Calibration of QM-MOURA three-axis magnetometer and gradiometer(European Geoscience Union (EGU), 2015-01-30) Díaz Michelena, Marina; Sanz, Ruy; Cerdán, M. F.; Fernández, A. B.; Ministerio de Economía y Competitividad (MINECO)MOURA instrument is a three-axis magnetometer and gradiometer designed and developed for Mars MetNet Precursor mission. The initial scientific goal of the instrument is to measure the local magnetic field in the surroundings of the lander i.e. to characterize the magnetic environment generated by the remanent magnetization of the crust and the superimposed daily variations of the field produced either by the solar wind incidence or by the thermomagnetic variations. Therefore, the qualification model (QM) will be tested in representative scenarios like magnetic surveys on terrestrial analogues of Mars and monitoring solar events, with the aim to achieve some experience prior to the arrival to Mars. In this work, we present a practical first approach for calibration of the instrument in the laboratory; a finer correction after the comparison of MOURA data with those of a reference magnetometer located in San Pablo de los Montes (SPT) INTERMAGNET Observatory; and a comparative recording of a geomagnetic storm as a demonstration of the compliance of the instrument capabilities with the scientific objectives.Publicación Acceso Abierto Mars MOURA magnetometer demonstration for high-resolution mapping on terrestrial analogues(European Geoscience Union (EGU), 2016-05-19) Díaz Michelena, Marina; Kilian, R.; Sanz, Ruy; Ríos, F.; Baeza, O.; Ministerio de Economía y Competitividad (MINECO)Satellite-based magnetic measurements of Mars indicate complex and very strong magnetic anomalies, which led to an intensive and long-lasting discussion about their possible origin. To make some progress in the investigation of the origin of these anomalies the MOURA vector magnetometer was developed for in situ measurements on Mars. In this work we propose the utilisation of such an instrument for future planetary on-ground surveys. The proof of its suitability is seen through testing it on various terrestrial analogues characterised by the distinct magnetic anomalies of their basement rocks: (1) a magnetite body of EL Laco (up to +110 000 nT) and its transition to surrounding andesites ( < +2000 nT) in the northern Andes of Chile showing the highest local magnetic anomalies. The magnetite-bearing ore body has highly variable local anomalies due to its complex formation history where a significant dispersion in palaeo-orientations has been previously reported, while our vector data show relatively uniform and probably induced declinations. (2) A basaltic spatter cone of the Pali Aike volcanic field, in southern Chile, was characterised by very strong magnetic anomalies along the crater rim (up to +12 000 nT), controlled by the amount of single domain magnetites in the ground mass of the basalts. Due to their strong remanent signature, palaeo-declinations of the lavas and reorientations of collapsed blocks could be constrained by the vector data. (3) The Monturaqui meteorite crater (350 m diameter), in northern Chile, shows significant variations of its anomalies (from −2000 to > +6000 nT) in restricted areas of several square metres along its crater rim related to unexposed iron-bearing fragments of the impactor while its granitic and ignimbritic target rocks exhibit only very weak anomalies. (4) An area with several amphibolitic dykes, which cross-cut a Cretaceous granitoid in the southernmost Andes, where a decimetre-scale mapping was performed. In this case, pyrrhotite is the only magnetic carrier. It was formed during hydrothermal processes within the dykes. Very low (+40 to +120 nT) positive magnetic anomalies clearly depict the amount of 1–4 vol % pyrrhotite in these dykes, which is important as a mineralogical indicator as well as to detect associated gold and copper enrichment.Publicación Restringido Machine Learning Methods Applied to Broadband Electromagnetic Characterization(2025-11) Cublier Martínez, Aymar; Frövel de la Torre, Jorge; Sanz, Ruy; Plaza Gallardo, Borja; Poyatos Martinez, DavidThe introduction of composite materials in the aerospace industry has yielded improved performance and better strength-to-weight ratio in space platforms' design. The ubiquity of these materials in today's space missions involves, among other things, a deep understanding of their electromagnetic (EM) properties. To study the EM properties of dielectric materials, several machine learning algorithms such as Deep Neural Networks (DNN) and ensemble learning methods (Random Forest, Gradient Boosting) are implemented as extraction methods for EM characterization in free space. First, the training and testing datasets for the supervised learning algorithms are generated using EM simulations with given permittivity and loss tangent. Second, an existing high precision test bench is used at INTA's Computational and Applied Electromagnetics Laboratory (CAEM-Lab) for gathering data to feed the prediction models at the validation stage over a broad frequency range of 2.6−40GHz. Finally, results are contrasted with conventional methods for complex permittivity extraction, such as analytical based solutions and optimization related methods. Other features like temperature can be added to the models to study the EM properties of materials at cryogenic temperatures for space applications.Publicación Restringido Caracterización electromagnética de materiales aeroespaciales a temperaturas extremas(RIA-MAD4SPACE 2025, 2025-04) Cublier Martínez, Aymar; Auñón Marugán, Alicia; Ramos Somolinos, David; Sanz, Ruy; Plaza Gallardo, Borja; Poyatos Martinez, DavidEl uso de materiales compuestos y de impresión 3D ha generado avances significativos en la industria aeroespacial. Su óptima relación resistencia-peso ha supuesto un gran avance. Sin embargo, los gradientes extremos de temperatura presentes en el espacio plantean nuevos retos y requieren estudios detallados de su rendimiento. Este trabajo propone un sistema de caracterización electromagnética no resonante basado en doble línea microstrip para la caracterización electromagnética a temperatura (de -55ºC a 80ºC) en un amplio rango de frecuencia (40 MHz – 8 GHz). Mediante simulaciones y medidas a temperatura ambiente se validan los métodos de extracción de la permitividad y la tangente de pérdidas de los materiales estudiados (FR-4, ROGERS 4350B, y CuClad-250). Posteriormente, las medidas a temperatura se realizan en el interior de la cámara térmica “Osa Menor” del INTA. Los resultados muestran la robustez y fiabilidad del sistema de medidas, así como de los métodos de extracción. Una vez validado el modelo y analizado sus limitaciones se está trabajando en el diseño de un sistema más complejo que mejore la precisión y estabilidad de los resultados.Publicación Restringido Metamateriales nanoestructurados para criostatos de uso espacial(RIA-MAD4SPACE 2025, 2025-04) Madueño, L.; Velázquez, E.; Ramos Somolinos, David; Díaz, A.; Scheneider, M.; Plaza Gallardo, Borja; Poyatos Martinez, David; del Hoyo Gordillo, Juan Carlos; Urqui, R.; Worgull, M.; Martín, B.; Arribas, P. J.; Sanz, RuyEl aislamiento térmico y electromagnético (desde DC hasta GHz) en criostatos terrestres y espaciales es fundamental para garantizar un entorno de trabajo adecuado para la instrumentación de próxima generación. En el caso de los detectores de rayos X, el aislamientosimultáneosevuelvecrucialparalossensoresdebordedetransición,comolosdelinstrumentoX-IFU (misión ATHENA)[1]. Los materiales estructurales y de revestimiento interno de los criostatos son clave para alcanzar los niveles de aislamiento más exigentes. De hecho, la elección de los materiales requiere un equilibrio delicado, por ejemplo, en cuanto a peso, compatibilidad con el vacío, propiedades electromagnéticas y conductividad térmica. Sin embargo, algunos metamateriales nanoestructurados[2] pueden ser diseñados de forma apropiada y ofrecer respuestas personalizadas y mejores rendimientos que los materiales monofásicos/componentes. No obstante, estos metamateriales deben ser compatibles con las temperaturas espaciales y criogénicas. Además, deben sintetizarse mediante métodos económicos y asequibles para que sean escalables y compatibles con las técnicas de fabricación. Para afrontarestereto,hemoselegidodostiposprincipalesdematerialesbase con baja conductividad térmica.(k): Poly-ether-ether-cetona (PEEK,k≈0.17W·m-1·K-1) siendo un polímero termoplástico técnico calificado para condiciones espaciales, de ultra alto vacío y criogénicas; y crecimiento de óxido sanódicos en titanio (k≤1.5W·m-1·K-1[4]),que es un material común en aplicaciones aeroespaciales.Publicación Acceso Abierto Asymmetrical magnetization processes induced by compositional gradients in ferromagnetic nanowires(Elsevier, 2024-01-16) Fernández González, Claudia; Berja, Alba; Álvaro Gómez, Laura; Martín-Rubio, Carolina; Mascaraque, Arantzazu; Aballe, Lucía; Sanz, Ruy; Pérez, L.; Ruiz Gómez, Sandra; Centros de Excelencia Severo Ochoa, INSTITUTO MADRILEÑO DE ESTUDIOS AVANZADOS EN NANOCIENCIA, SEV-2016-0686Electrodeposited nanowires are an excellent scenario to study and control magnetic domain wall motion in nanostructures. In particular, the introduction of local changes in composition during the growth procedure has been proven to be very efficient for controlling the magnetization dynamics. In this work, we show the possibility of introducing compositional gradients in FeNi electrodeposited nanowires by gradually changing the Fe/Ni ratio along their axis. These compositional gradients produce an asymmetrical landscape for domain wall motion which is reflected in asymmetrical magnetization processes under an applied magnetic field. By studying nanowires with different compositional gradients we were able to correlate composition and magnetic asymmetry. Our results pave the way towards full control of the movement of domain walls along the nanowires.Publicación Restringido Asymmetric magnetic response induced by compositional gradients in Ni-Fe nanowires(IEEE Nanotechnology Council (NTC), 2024-07-09) Fernández González, Claudia; Gómez Cruz, Lucía; Álvaro Gómez, Laura; Berja, Alba; Martín-Rubio, Carolina; Waqas Khaliq, M.; Foerster, Michael; Niño, M. Ángel; Mascaraque, Arantzazu; Sanz, Ruy; Aballe, Lucía; Pérez, Lucas; Ruiz Gómez, Sandra"The control over the domain wall motion in cylindrical nanostructures is a key factor for developing the next generation of spintronic and logic devices [1,2]. Among several strategies, introducing changes in the chemical structure of the wire (chemical barriers) has been proved to be an effective way to pin the domain walls [3], but determining the direction of the domain wall movement still remains as an open challenge. Following the same approach, in this work we introduced gradients of composition in Ni-Fe nanowires to pattern a ratchet profile of the domain wall energy along the nanowire axis, in order to create an asymmetry for the domain wall movement. Nanowires were synthesized using template assisted electrodeposition. Composition was gradually changed between Ni90Fe10 to Ni35Fe65 along the nanowire longitudinal axis in periods of a few micrometres (fig.1.a). Combining laterally resolved X-ray Absorption Spectro-microscopy (XAS) and X-ray Magnetic Circular Dichroism (XMCD) we correlate the chemical structure of single nanowires with their 3D spin texture. By applying external magnetic fields along the nanowire axis, we studied the evolution of the magnetic state depending on the field direction. In addition, First Order Reversal Curves (FORC) were also measured in arrays of nanowires. The FORC diagrams of nanowires with homogeneous composition and nanowires with axial gradients of composition are shown in fig.1.b-c. While the diagram of homogeneous nanowires is highly symmetric with respect to the interaction field axis (HU)(b), an asymmetry arises in the diagram of nanowires with axial gradients (red square) (c), evidencing the emerging of asymmetrical magnetization processes in the nanowires [4]."
