A5048201167- Dark Matter and Cosmic Phenomena
- Microwave and Dielectric Measurement Techniques
- Microwave Engineering and Waveguides
- Electromagnetic Compatibility and Measurements
- Electromagnetic Compatibility and Noise Suppression
- Advanced Antenna and Metasurface Technologies
- Particle physics theoretical and experimental studies
- Atomic and Subatomic Physics Research
- Underwater Vehicles and Communication Systems
- Superconducting and THz Device Technology
- Astrophysics and Cosmic Phenomena
- Particle Detector Development and Performance
- Maritime Navigation and Safety
- Heat Transfer and Optimization
- Advanced Fiber Optic Sensors
- Induction Heating and Inverter Technology
- Higher Education Teaching and Evaluation
- Cold Atom Physics and Bose-Einstein Condensates
- Soil Moisture and Remote Sensing
- E-Learning and Knowledge Management
- Physics of Superconductivity and Magnetism
- Millimeter-Wave Propagation and Modeling
- Electromagnetic wave absorption materials
- Mobile Learning in Education
- Cognitive Science and Education Research
Universidad Politécnica de Cartagena
2014-2023
Max Planck Institute for Physics
2018
Max Planck Society
2018
University of Cartagena
2007-2010
Centre for Automation and Robotics
1995
A bstract We present results of the Relic Axion Dark-Matter Exploratory Setup (RADES), a detector which is part CERN Solar Telescope (CAST), searching for axion dark matter in 34.67 μ eV mass range. radio frequency cavity consisting 5 sub-cavities coupled by inductive irises took physics data inside CAST dipole magnet first time using this filter-like haloscope geometry. An exclusion limit with 95% credibility level on axion-photon coupling constant g aγ ≳ 4 × 10 − 13 GeV 1 over range 34 ....
We propose, design and construct a variant of the conventional axion haloscope concept that could be competitive in search for dark matter axions masses decade 10–100 μeV. Theses are located somewhat above mass range which existing experiments have reached sensitivity to benchmark QCD models. Our consists an array small microwave cavities connected by rectangular irises, arrangement commonly used radio-frequency filters. The size unit cavity determines main resonant frequency, while...
We propose a novel experiment, the Canfranc Axion Detection Experiment (CADEx), to probe dark matter axions with masses in range 330-460 $\mu$eV, within W-band (80-110 GHz), an unexplored parameter space well-motivated window of Quantum ChromoDynamics (QCD) axions. The experimental design consists microwave resonant cavity haloscope high static magnetic field coupled highly sensitive detecting system based on Kinetic Inductance Detectors via optimized quasi-optics (horns and mirrors)....
A bstract RADES (Relic Axion Detector Exploratory Setup) is a project with the goal of directly searching for axion dark matter above 30 μ eV scale employing custom-made microwave filters in magnetic dipole fields. Currently taking data at LHC CAST experiment. In long term, cavities are envisioned to take BabyIAXO magnet. this article we report on modelling, building and characterisation an optimised microwave-filter design alternating irises that exploits maximal coupling axions while being...
Abstract In the near future BabyIAXO will be most powerful axion helioscope, relying on a custom‐made magnet of two bores 70 cm diameter and 10 m long, with total available magnetic volume more than 7 3 . this document, it proposes describe implementation low‐frequency haloscope setups suitable for operation inside magnet. The RADES proposal has potential sensitivity to axion‐photon coupling down values corresponding KSVZ model, in (currently unexplored) mass range between 1 2 eV, after...
Current axion detection limits neglect the relevance of relative velocity between field and detectors. However, this aspect can lead to a daily modulation detected signal. In work, we calculate cross-correlation various signals potentially originated in multiple-cavity setups, analyze how signal-to-noise ratio directional sensitivity depend on signal among multiple cavities. The after exhibits greater rate increase over time compared power-summation technique, making it clear that method...
The tragic Deepwater Horizon accident in the Gulf of Mexico 2010 as well increase deepwater offshore activity have increased public interest counter-measures available for sub-surface releases hydrocarbons. To arrive at proper contingency planning, response managers urge a system instant detection and characterization accidental releases. Along these lines, this paper describes application heterogeneous robotic unmanned vehicles: autonomous underwater vehicle (AUV), surface (USV) aerial...
In this study, a novel ten-port waveguide microwave sensor is designed, implemented, calibrated and tested in order to obtain the reflection coefficient magnitude phase. This reflectometer based on well known six-port structure but number of detectors has been increased eight improve sampling procedure standing wave present within waveguide. addition, learning method neural networks' usage implemented for autonomous calibration from data collected by vector network analyzer. An automated...
Abstract BACKGROUND The heating of a green smoothie during an innovative semi‐continuous microwave treatment (MW; 9 kW for 15 s) was modelled. Thermal and dielectric properties the samples were previously determined. Furthermore, effect on main chemopreventive compounds its subsequent storage up to 30 days at 5 or °C studied. Such results compared conventional pasteurisation (CP; 90 45 while unheated fresh blended used as control. RESULTS A procedure developed predict temperature...
Permittivity of materials is utmost importance for microwave applicators’ design and to predict high-frequency dielectric heating materials. In the case aromatic plant biomass, however, there are few data that help researchers applicators microwave-assisted extraction. this work, permittivity cypress rockrose biomass samples were measured versus temperature, density, moisture content. A resonant technique based on a coaxial bi-reentrant cavity was employed obtain complex as function those...
In a world with increasing systems accessing to radio spectrum, the concern for exposure electromagnetic fields is growing and therefore it necessary check limits in those areas where sources are working. Therefore, maps continuously being generated, mainly outdoor areas, by using many interpolation techniques. this work, Surfer software Kriging have been used first time generate an indoor map. A regular measuring mesh has generated. Elimination of Less Significant Points (ELSP) Geometrical...
Tuning is an essential requirement for the search of dark matter axions employing haloscopes since its mass not known yet to scientific community. At present day, most haloscope tuning systems are based on mechanical devices which can lead failures due complexity environment in they used. However, electronic making use ferroelectric materials provide a path that less vulnerable and thus complements expands current systems. In this work, we design novel technique using Potassium Tantalate...
In this paper, a new two-tier inverse characterization technique for coaxial to waveguide transition evaluation is presented and properly validated. The characterized by estimating its scattering parameters cascade procedure employed in order compare simulations measurements during the unterminating procedure. contrast other methods there are no restrictions concerning number type of standards two transitions simultaneously characterized. Additionally, genetic algorithms gradient descent...
A bstract Haloscopes are resonant cavities that serve as detectors of dark matter axions when they immersed in a strong static magnetic field. In order to increase the volume and improve space compatibility with dipole or solenoid magnets for axion searches, various haloscope design techniques rectangular geometries discussed this study. The limits two types haloscopes explored: those based on single multicavities. both cases, possibilities increasing long and/or tall structures presented....
In this paper, a novel technique to achieve precise temperatures in food sterilization has been proposed. An accurate temperature profile is needed order reach commitment between the total removal of pathogens inside product and preservation nutritional organoleptic characteristics. The minimal variation target sample by means monitoring control software platform, allowing stabilization over 100 °C, main goal work. A cylindrical microwave oven, under pressure conditions continuous supply...
Wireless Communication technologies are in continuous evolution. Around the world, many Universities try to provide innovative laboratory courses train their students this field. In paper, a ubiquitous course for wireless communications is described. The has been designed so that have complete six different experiments. Three of these experiments use advanced professional network testing tools order practical experience simulation tools. Two additional implemented hands-on measurements...
In the near future BabyIAXO will be most powerful axion helioscope, relying on a custom-made magnet of two bores 70 cm diameter and 10 m long, with total available magnetic volume more than 7 m$^3$. this document, we propose describe implementation low-frequency haloscope setups suitable for operation inside magnet. The RADES proposal has potential sensitivity to axion-photon coupling $g_{aγ}$ down values corresponding KSVZ model, in (currently unexplored) mass range between 1 2$~μ$eV, after...
Electromagnetic shielding of metallic enclosures with an aperture are simulated and measured in the frequency time domain this paper. Recently, several new figures effectiveness (SE) have been proposed. Much work has done regarding numerical simulations; however, little related to measurements carried out. In paper, we obtain results for these SE definitions when incident plane wave, a determined bandwidth, excites enclosure. The wave can be treated as reference interference compare other...
Abstract While several mm‐wave and sub‐THz frequency bands are being proposed for next generation wireless systems to meet the increasing traffic demand, electromagnetic properties of many common use materials at those frequencies still need be determined. The evaluation such is important design deployment future networks. Recently, a simple method based on Fabry‐Pérot resonance has been address easy material characterization frequencies. In this study, improved applied frequencies, in order...
Equivalent models of printed circuit boards (PCBs) are useful to simplify electromagnetic problems by reducing the computational costs numerical simulations. In this paper, a new procedure for obtaining simple equivalent model PCBs inside metallic enclosures is presented. The obtained in two steps: first we precisely characterize coaxial waveguide transitions used during measurements means an inverse and then second procedure, carry out simulations concatenating these comparing measurements....
In this reported work it is shown that one of the most employed filtering systems for use in continuous-flow industrial microwave ovens, namely doubly corrugated filters, does not properly many values electric permittivity processed material when partially filled. Thus, a novel bandstop filter which solves these inconveniences, based on combination metallic irises and double corrugations, designed by means CST Microwave Studio® experimentally validated.