A5051147495- Particle Detector Development and Performance
- Particle physics theoretical and experimental studies
- Radiation Detection and Scintillator Technologies
- Electromagnetic Compatibility and Noise Suppression
- Electromagnetic wave absorption materials
- Electromagnetic Compatibility and Measurements
- Advanced Antenna and Metasurface Technologies
- Radar Systems and Signal Processing
- Atomic and Subatomic Physics Research
- Distributed and Parallel Computing Systems
- High-Energy Particle Collisions Research
- Advancements in PLL and VCO Technologies
- Advanced SAR Imaging Techniques
- Geothermal Energy Systems and Applications
- Antenna Design and Analysis
- Advanced Data Storage Technologies
- Semiconductor Lasers and Optical Devices
- Direction-of-Arrival Estimation Techniques
- Soil and Unsaturated Flow
- Medical Imaging Techniques and Applications
- Radiation Effects in Electronics
- Radio Wave Propagation Studies
- Nuclear Physics and Applications
- CCD and CMOS Imaging Sensors
- GNSS positioning and interference
Universitat Politècnica de Catalunya
2025
Universitat de València
2014-2024
The University of Texas Health Science Center at Houston
2024
University of Florida
2021-2023
United States Geological Survey
2023
Consejo Superior de Investigaciones Científicas
2022
Flight Works (United States)
2019-2021
Institute of Flight
2019-2021
Guardia Civil
2021
Mitre (United States)
1992-2012
ABSTRACT Topology optimization is probably one of the most efficient techniques for structural design. However, running topology without geometry control provides complex designs, which often are manufactured with additive manufacturing methods. Consequently, a fundamental aspect in to consider following constraints: minimal length scale and overhang. The aim this paper propose new numerical method globally such constraints. idea relies on penalizing regularized version perimeter: an...
This contribution describes an accurate approach implementing a Time-to-Digital Converter using Field-Programmable Gate Array (FPGA) device. Time differences with FWHM better than 100 ps for 24 pairs of channels working simultaneously have been achieved. was possible through the proper management FPGA internal resources and by device calibration process minimizing effect temperature voltage fluctuations. The system results time between multiple are presented. current suggests possibility...
Airborne surveillance radars need to operate in an environment that can include the presence of ground clutter, standoff jammers, and diffuse jammer multipath. It is demonstrated here a phased-array radar employs adaptive spatial degrees freedom, plus two different sets temporal freedom effectively cancel aforementioned interference acceptable level. The taps required for each antenna element consist one set spaced by pulse repetition interval, so as another about one-half reciprocal...
The design and field test of a novel sensor system based in autonomous wireless sensors to measure the temperature heat transfer fluid along borehole exchanger (BHE) is presented. system, by means two special valves, inserts extracts miniaturized inside pipes borehole, which are carried thermal fluid. Each embedded small sphere just 25 mm diameter 8 gr weight, containing transceiver, microcontroller, power supply. A data processing unit transmits acquisition configuration before...
The study and measurement of the shielding effectiveness (SE) planar materials is required to predict suitability a certain material form an enclosed electromagnetic shield. One most widely used standards for measuring SE ASMT D4935-18. It based on coaxial sample holder (CSH) that operates up 1.5 GHz. Due this standard’s frequency limitations, new variants with higher limits have been developed by decreasing size CSH conductors samples. However, method its high-frequency require two types...
This paper summarizes an alternate test methodology that enables significant reduction in testing time and tester complexity for RF circuits without the need low-level simulation models. Traditionally, makes use of circuit process-level models to analyze sensitivity datasheet specifications variations process parameters. In this paper, we demonstrate a "gray-box" approach by creating high-level model from information simple hardware measurements. is used together with customized behavioral...
The gap of standardization for conducted and field coupled electromagnetic interferences (EMI) in the 2-150 kHz frequency range can lead to Electromagnetic Compatibility (EMC) problems. This is caused by power systems such as Pulse Width Modulation (PWM) controlled rectifiers, photovoltaic inverters or charging battery units electric vehicles. a very important spectral due generated wide devices and, specifically, communication problems new technologies incorporated traditional grid convert...
The reduction of embedded portable devices involves a magnetic field interference problem when it integrates near communication (NFC) due to the presence conductive surfaces, such as ground planes, batteries, or metallic enclosures. Flexible sintered ferrite sheets (FSFS) represent an interesting shielding solution prevent electromagnetic interferences problems related NFC, thanks their ability control flux. characterization FSFS effectiveness is analyzed function sheet thickness in this...
In this article, a low-power, radiation-hard front-end circuit for monolithic pixel sensors, designed to meet the requirements of low noise and pixel-to-pixel variability, key features achieve high detection efficiencies, is presented. The sensor small collection electrode capacitance (<5 fF) allows full CMOS in-pixel circuitry. implemented in 180-nm imaging technology from TowerJazz foundry integrated into MALTA2 chip, which part development that targets specifications outer layer ATLAS...
Rome Laboratory's (RLs) Multichannel Airborne Radar Measurements (MCARM) program has collected clutter and target data employing an L-band airborne phased array radar testbed. The collection is at the output of electronically steered active mounted on BAC1-11 aircraft. MCARM 16 columns, each consisting two four-element subarrays. Each subarray its own or combined into a single per column with up to 24 outputs for array. Space-time adaptive processing (STAP) techniques simultaneously combine...
Magnetic near-field probes (NFP) represent a suitable tool to measure the magnetic field level from small electromagnetic interference (EMI) source. This kind of antenna is useful as probe for pre-compliance EMC measurements or debugging tasks since user can scan printed circuit board (PCB) looking locations with strong fields. When H-field point found, designer should check PCB layout and components placement in that area detect if this could result an EMI contribution focuses on analyzing...
Abstract Energy producing companies increasingly exploit non-conventional hydrocarbon resources such as heavy oil, bitumen or shale. Because of their large viscosity, production oil from is frequently done through reservoir heating, most often via steam injection. In some cases the injection not a good alternative, especially, for tar sands. A better suited technology may be electromagnetic heating (EMH) assisted recovery. Different physical mechanisms underlie according to frequency (EM)...
Electromagnetic noise absorber sheets have become a solution for solving complex electromagnetic interference (EMI) problems due to their high magnetic losses. This contribution is focused on characterizing novel structure that based an film with metal layer attached its top side. Two different compositions were combined Al and Cu layers in order study the improvement performance of these structures, depending permeability, thickness, type metal. The transmission attenuation power ratio...
As the world continues to change and evolve, students must acquire a diverse set of competencies skills that focus on sustainability. This term extends beyond environmental matters, encompassing educational aspects, such as critical thinking, communication, creativity, collaboration, problem solving, all which are crucial components. In order promote these aspects in an engineering learning environment, using tools emulate real-life tasks related students’ future careers can significantly...
It is shown that internal clutter motion, aircraft crabbing, scattering from near-field obstacles, and channel mismatch can limit the effectiveness of space-time processing in eliminating airborne clutter. An analytical expression developed to show how each these effects produces a deterioration signal-to-clutter-plus-noise ratio achievable. By studying spectral decomposition covariance matrix, it found both motion crabbing either be compensated by artificially adding noise or more pulses. A...
Summary Steam injection is often not a good alternative for oil recovery from shallow bitumen reservoirs. For instance, the thin caprock creates danger of steam breakthrough. deeper reservoirs, heat losses wells may be prohibitive. A technology that better suited aided by low-frequency electrical heating reservoir. This technology, well known environmental remedial applications, has been field tried recently, yielding promising results. The process uses electric conductivity connate water to...
The development of new advanced functionalities, miniaturization, and the aim obtaining optimized performance in electronic devices significantly impacts their electromagnetic compatibility (EMC). As components become more densely packed on a printed circuit board (PCB), unintended coupling between can cause interference (EMI). These requirements result design restrictions that make using level shield (BLS) essential reducing intra-system EMI PCB designs. This contribution focuses studying...
Techniques are described for performing adaptive jammer nulling over extremely wide bandwidths on radar systems which use linear frequency modulated (LFM) waveforms and stretch processing. It is assumed that the range uncertainty of target a small percentage equivalent extent uncompressed pulse. The assumption allows cancellation to take place following processing in either time domain using narrowband sliding filter keeps up with chirp fate or domain. new approach supports performance...
Silicon photomultipliers (SiPMs) have become an alternative to traditional tubes due several features. However, their implementation form large arrays is still a challenge especially relatively high intrinsic noise, depending on the chosen readout. In this contribution, two modules composed of 12 ×12 SiPMs with area roughly 50 mm×50 mm are used in coincidence. Coincidence resolving time (CRT) results field-programmable gate array, combination digital converter, shown as function both sensor...
The interconnection of different electronic devices or systems through cables is becoming more difficult due to the hard restrictions related electromagnetic compatibility (EMC) in order comply with requirements. Therefore, use EMC components a good solution manage problems associated filtering interference (EMI) and pass compliance test. In this sense, sleeve ferrite cores become very interesting since they can be set around wire and, hence, provide an effective against EMI without having...
In this paper we describe the performance and test results of production 38 ATLAS TileCal Read Out Drivers (RODs). We first basic hardware specifications firmware functionality modules, test-bench setup used for procedure to qualify boards. then finally show discuss results.
The ideal procedure to start designing an electronic device is consider the electromagnetic compatibility (EMC) from beginning. Even so, EMC problems can appear afterward, especially when designed system interconnected with external devices. Thereby, interferences (EMIs) could be transmitted our power cables that interconnect it source or are connected another establish wired communication. application of EMI suppressor such as a sleeve core encircles widely used technique attenuate EM...
This paper describes the development of optical multiplexer board (OMB), also known as PreROD board, for TileCal readout system in ATLAS experiment. The aim this is to overcome problems that may arise integrity data due radiation effects. solution adopted has been add redundancy transmission and so two fibers with same come out from detector front end boards. OMB decide real time which fiber, eventually, carries no errors switching it output link connected read driver (ROD) motherboard where...