Examinando por Autor "De Frutos, J."

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Adaption of Magnetic Cleanliness Facilities and Procedures to Overcome the New Challenges of the Scientific Missions
(Institute of Electrical and Electronics Engineers, 2019-05-21) Díaz Michelena, M.; Rivero, M. A.; De Frutos, J.; Ordoñez Cencerrado, Amanda A.; Agencia Estatal de Investigación (AEI); European Research Council (ERC)
Scientific goals in magnetometry require extremely high resolution magnetometers, a very good program of magnetic cleanliness and a powerful processing methodology. When magnetic cleanliness reaches its limits the exhaustive characterisation of the magnetic signature of the different subsystems together with compensation systems (HW) and algorithms (SW) may be the only way to achieve the performance demanded by the scientific objectives. Furthermore, exploration horizons, only within the limits of our Solar System, present scientific challenges in harsh conditions which comprise, among others, extreme swings of temperature. The magnetic properties of materials depend on temperature and the electrical resistance of wires and coils too. Therefore in wide temperature ranges the behaviour of the magnetic signature with temperature needs to be analysed, minimized when possible, and introduced in the retrieval algorithms for an optimal response. The requirements for the subsystems are present in their testing route documentation. However there are not standards or norms with the established procedures to develop these tests. In this work the INTA Space Magnetism Laboratory will overview different methodologies implemented for standard tests, will introduce some of the upcoming and challenging requirements and will present some of the solutions implemented.
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New Techniques of Magnetic Cleanliness for Present and Near Future Missions
(Institute of Electrical and Electronics Engineers, 2019-09-05) Díaz Michelena, M.; Ordoñez Cencerrado, Amanda A.; De Frutos, J.; Rivero Rodríguez, M. A.; European Research Council (ERC); Agencia Estatal de Investigación (AEI)
Present space missions often have strict requirements on the magnetic cleanliness of the equipment. To characterize the magnetic signature of the equipment implies measurements in a magnetically controlled facility, adequate procedures and a powerful processing methodology. The combination of new scientific challenges to measure with the harsh conditions of present and near future missions, rise new requirements for the embarked equipment. One example of this question is the thermomagnetic signature of the devices. This is motivated by the extreme swings of temperature as well as the dependence of the magnetic properties and the electrical resistance (in voltage controlled systems) with the temperature. To guarantee the compliance of the systems with the requirements, the tests have to start in the initial stages of the projects when obviously representative equipment is not fully integrated and therefore cannot be tested. This situation has been overcome by INTA Space Magnetism Laboratory (SML) with a methodology which includes: analysis of the parts magnetic behavior with temperature, building of models and comparison of the results from models (initial stages from models) and experimental tests when the systems are assembled (later stages of the projects). This kind of methodology is compatible with redesign in case of detection of critical components at the early phases of the design and development, and furthermore with the procurement (with long delivery times in the case of space components) in order to comply with the mission calendar.This manuscript deals with the methodology implemented for the thermomagnetic characterization of systems and subsystems.