Persona: Díaz Michelena, Marina
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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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Díaz Michelena
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Marina
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30 resultados
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Publicación Restringido NANOSAT-01: Three Years of Mission. Magnetic Scientific Results(Igneta Connect, 2009-06-13) Díaz Michelena, Marina; Cerdán, M. F.; Arruego, IgnacioThree years after the launch of NANOSAT-01, the first Spanish test-bed platform for microtechnology and nanoscience, we report on the analysis of the magnetic data received from the magnetic sensor of the ACS—Attitude Control Subsystem. This magnetometer is based on an AMR—Anisotropic MagnetoResistance COTS Commercial Off-The-Shelf transducer by Honeywell. The in-flight experience of this first analysis of a COTS magnetic sensor mapping and the comparison of the in-orbit data with the models of the Earth magnetic field in LEO—Low Earth Orbit let us affirm that the AMR technology is not only adequate for measuring the magnetic field in-orbit but also is a technology valid for a highly aggressive environment as is the case of a LEO.Publicación Restringido Synthesis and magnetic properties of single phase titanomagnetites(AIP Publishing, 2014-03-11) Schoenthal, W.; Liu, X.; Cox, T.; Mesa, José Luis; Maícas, N.; Díaz Michelena, Marina; Laughlin, David E.; McHenry, M. E.The focus of this paper is the study of cation distributions and resulting magnetizations in titanomagnetites (TMs), (1−x)Fe3O4−xFe2TiO4 solid solutions. TM remnant states are hypothesized to contribute to planetary magnetic field anomalies. This work correlates experimental data with proposed models for the TM pseudobinary. Improved synthesis procedures are reported for single phase Ulvöspinel (Fe2TiO4), and TM solid solutions were made using solid state synthesis techniques. X-ray diffraction and scanning electron microscopy show samples to be single phase solid solutions. M-H curves of TM75, 80, 85, 90, and 95 (TMX where X = at. % of ulvöspinel) were measured using a Physical Property Measurement System at 10 K, in fields of 0 to 8 T. The saturation magnetization was found to be close to that predicted by the Neel model for cation distribution in TMs. M-T curves of the remnant magnetization were measured from 10 K to 350 K. The remnant magnetization was acquired at 10 K by applying an 8 T field and then releasing the field. Experimental Neel temperatures are reported for samples in the Neel model ground state.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 Restringido Design of a Portable Susceptometer With No Electromagnets(Institute of Electrical and Electronics Engineers (IEEE), 2023-12-04) Rivelles García, Alejandro; Sanz Lluch, María del Mar; Maicas, Marco; Mesa, José Luis; Díaz Michelena, Marina; Aroca, Claudio; Ministerio de Ciencia e Innovación (MICINN); European Research Council (ERC)Magnetic materials characterization usually requires heavy equipment based on electromagnets, which limits their use to the laboratory. The volume of the typical samples is small in order to keep a good uniformity of the applied magnetic field in the sample. This kind of equipment is not appropriate for geological measurements in the field, where portable systems are required and samples have typically a higher volume. Here, we study the limits and applicability of a portable susceptometer device based on strong magnets potentially applicable in geological prospections. A new prototype has been built and tested. The device makes use of Nd–Fe–B magnets and an iron magnetic circuit (MC) to apply the magnetic field to the sample. A quasi-spherical geometry of the MC provides good uniformity of the magnetic field while keeping a moderate measuring volume. The equipment is powered by a 12-V battery and a mechanical design allows the control of the magnetic flux density in the range of approximately 30–130 mT.Publicación Acceso Abierto A novel induction-based device for the measurement of the complex magnetic susceptibility(Elsevier, 2017-08-13) Díaz Michelena, Marina; Mesa, José Luis; Pérez jiménez, M.; Maicas Ramos, M. C.; Cobos Arribas, P.; Hernández Ros, C. A.; Mesa, José Luis; European Research Council (ERC)A device named magnetic susceptometer for a complete determination of the magnetic complex susceptibility of materials and minerals has been conceived and manufactured as a complement for the in situ characterization of rocks during high resolution magnetic prospections. In this work a device and its capabilities for susceptibility measurements are described, the calibration performed with artificial samples, and the values of real and imaginary susceptibility of natural samples in a range comprising: χ = 10−4 to 10−7 [SI], representative of Earth and also Mars rocks.Publicación Restringido A New Single-Sensor Magnetic Field Gradiometer(Igneta Connect, 2009-08-13) Lucas, I.; Díaz Michelena, Marina; De Manuel, V.; Plaza, J. A.; Duch, M.; Esteve, J.; Guerrero, H.In this work a magnetic field gradiometer device has been developed. This device is not composed by two sensors separated a certain distance but by a single-sensor device which measures the real gradient value just at the point where it is wanted to be measured. The experimental set-up consists of a sensor head (a membrane with a fixed permanent magnet on it) vibrating at its resonance frequency, due to an alternating magnetic field gradient. Detection is performed using an optoelectronic method. Two different measurement techniques have been used: frequency measurements (the resonance frequency is measured for every external magnetic field gradient value) and amplitude measurements (the signal amplitude is measured without changing the resonance frequency obtained without an external magnetic field gradient applied). The mechanical stresses of the membrane are related with the dependence of both magnitudes (frequency and amplitude) on the external magnetic field gradient. The minimum and maximum value of the resonance frequency and signal amplitude respectively, correspond with magnetic forces equal to the magnet weight of the sensor head. This prototype shows a noise-limited sensitivity of 2 Gauss/m/√Hz at zero gradient. This device could be used also as a magnetic susceptometer.Publicación Acceso Abierto Constraints on the Spatial Distribution of Lunar Crustal Magnetic Sources From Orbital Magnetic Field Data(Advancing Earth and Space Science (AGU), 2024-02-14) Oliveira, Joana S.; Vervelidou, Foteini; Wieczorek, Mark A.; Díaz Michelena, Marina; Ministerio de Ciencia e Innovación (MICINN); European Research Council (ERC)Spacecraft measurements show that the crust of the Moon is heterogeneously magnetized. The sources of these magnetic anomalies are yet not fully understood, with most not being related to known geological structures or processes. Here, we use an inversion methodology that relies on the assumption of unidirectional magnetization, commonly referred to as Parker's method, to elucidate the origin of the magnetic sources by constraining the location and geometry of the underlying magnetization. This method has been used previously to infer the direction of the underlying magnetization but it has not been tested as to whether it can infer the geometry of the source. The performance of the method is here assessed by conducting a variety of tests, using synthetic magnetized bodies of different geometries mimicking the main geological structures potentially magnetized within the lunar crust. Results from our tests show that this method successfully localizes and delineates the two-dimensional surface projection of subsurface three-dimensional magnetized bodies, provided their magnetization is close to unidirectional and the magnetic field data are of sufficient spatial resolution and reasonable signal-to-noise ratio. We applied this inversion method to two different lunar magnetic anomalies, the Mendel-Rydberg impact basin and the Reiner Gamma swirl. For Mendel-Rydberg, our analysis shows that the strongest magnetic sources are located within the basin's inner ring, whereas for Reiner Gamma, the strongest magnetic sources form a narrow dike-like body that emanates from the center of the Marius Hills volcanic complex.Publicación Restringido The Role of Atmosphere on Phase Transformations and Magnetic Properties of Ulvospinel(Institute of Electrical and Electronics Engineers, 2013-07-12) Groschner, C.; Lan, S.; Wise, A.; Leary, A.; Lucas, M. S.; Park, C.; Laughlin, David E.; Díaz Michelena, Marina; McHenry, M. E.; National Science Foundation (NSF)We have synthesized the antiferromagnetic mineral ulvospinel, Fe 2 TiO 4, in Ar to assess the role of inert atmosphere on phase formation and magnetic properties. We report the role of atmosphere on a possible phase transition and the magnetic properties of this mineral. Atmosphere dependent transformations of ulvospinel are observed with increasing temperature. Oxidation of ulvospinel to form metastable titanomaghemite is shown to occur at 300° in atmospheric conditions. Only slight titanomaghematitzation was observed in samples transformed under pressure in in situ temperature dependent X-ray experiments. Formation of ilmenite and hematite from ulvospinel was observed under high temperature, high pressure, and low oxygen atmosphere conditions.Publicación Restringido On the Design of a Planetary Protection Shell for EMC Testing on Space Equipment(Institute of Electrical and Electronics Engineers, 2020-06-22) Fernández Romero, Sergio; Muñoz Rebate, I.; Jiménez Lorenzo, María; Plaza Gallardo, Borja; Poyatos Martinez, David; Díaz Michelena, Marina; Agencia Estatal de Investigación (AEI); Fernández Romero, S. [0000-0002-7169-2222]; Jiménez Lorenzo, M. [0000-0003-1243-6111]; Plaza Gallardo, B. [0000-0003-3615-0353]; Poyatos Martínez, D. [0000-0002-3829-5110]This letter addresses on the design of a planetary protection shell for performing the Electro-Magnetic Compatibility (EMC) tests of the Anisotropic Magneto-Resistance (AMR) sensor of the ExoMars mission. This mission has strict bio-burden requirements. The ElectroMagnetic (EM) properties of several materials have been investigated for measuring their transmission coefficients and the novelty of this letter is the use of Fused Deposition Modeling (FDM) technology as the production method. Additive manufacturing is presented as a promising technology in the field of radiofrequency since it can use a wide range of materials (including thermoplastics) with high and low transmission coefficient. The investigation comprises the analysis of the electromagnetic properties of several 3D printer materials in order to study their transmission coefficients. Seeing the EM characterization results, it was decided to produce a shell using FDM technology because it provides control over the grounding of the instrument and makes easier the integration, cleaning and protection against impacts during the operation, with great versatility and low cost. To finish, the shell has been proved during the acceptance EMC tests of the flight model and flight spare AMR instrument.Publicación Acceso Abierto Single Point Gradiometer for Planetary Applications(Institute of Electrical and Electronics Engineers, 2015-03-09) Mesa, José Luis; Díaz Michelena, Marina; Ciudad, D.; Schoenthal, W.; McHenry, M. E.; Maicas, M.; Aroca, C.; Ministerio de Ciencia e Innovación (MICINN)We have designed and fabricated a microelectromechanical device, based on the alternating field gradient concept, to measure surface magnetic field gradient on planets. Its sensitivity is 4 10 -4 T/m, which is appropriate for magnetite outcrops and areas with rocks formed at different stages recording geomagnetic field reversals. We present the results obtained with three different prototypes.
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