A5026732812- Radio Frequency Integrated Circuit Design
- Semiconductor Lasers and Optical Devices
- Dark Matter and Cosmic Phenomena
- Photonic and Optical Devices
- Particle Detector Development and Performance
- Analog and Mixed-Signal Circuit Design
- Advancements in PLL and VCO Technologies
- Advanced Photonic Communication Systems
- Radiation Detection and Scintillator Technologies
- Advancements in Semiconductor Devices and Circuit Design
- Atomic and Subatomic Physics Research
- Optical Network Technologies
- Microwave Engineering and Waveguides
- Advanced Power Amplifier Design
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Optical Wireless Communication Technologies
- Neutrino Physics Research
- Integrated Circuits and Semiconductor Failure Analysis
- GaN-based semiconductor devices and materials
- Sensor Technology and Measurement Systems
- Low-power high-performance VLSI design
- Intelligent Tutoring Systems and Adaptive Learning
- Nuclear Physics and Applications
- Chaos control and synchronization
Centro Universitario de la Defensa
2015-2024
Universidad de Zaragoza
2013-2024
Instituto Tecnológico de Aragón
2024
Universidad de Granada
2022
Canfranc Underground Laboratory
2013-2020
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2015
CEA Paris-Saclay
2015
European Organization for Nuclear Research
2015
Doğuş University
2015
Acıbadem Adana Hospital
2015
We report on the design, construction and operation of a low background x-ray detection line composed shielded Micromegas detector microbulk technology. The is made from radiopure materials placed at focal point ∼ 5 cm diameter, 1.5 m focal-length, cone-approximation Wolter I telescope (XRT) assembled thermally-formed (or "slumped") glass substrates deposited with multilayer coatings. system has been conceived as technological pathfinder for future International Axion Observatory (IAXO), it...
We report the performance of a 10 atm Xenon/trimethylamine time projection chamber (TPC) for detection X-rays (30 keV) and γ-rays (0.511–1.275 MeV) in conjunction with accurate tracking associated electrons. When operated at such high pressure ~1%-admixtures, trimethylamine (TMA) endows Xenon an extremely low electron diffusion (1.3±0.13mm-σ (longitudinal), 0.95±0.20mm-σ (transverse) along 1 m drift) besides forming convenient 'Penning-Fluorescent' mixture. The TPC, that houses 1.1 kg gas...
If Dark Matter is made of Weakly Interacting Massive Particles (WIMPs) with masses below $${\sim }20$$ GeV, the corresponding nuclear recoils in mainstream WIMP experiments are energies too close, or below, experimental threshold. Gas Time Projection Chambers (TPCs) can be operated a variety target elements, offer good tracking capabilities and, on account amplification gas, very low thresholds achievable. Recent advances electronics and novel radiopure TPC readouts, especially micro-mesh...
This paper presents a new low-voltage pseudodifferential continuous-time CMOS transconductor for wide-band applications. The proposed cell is based on feedforward cancellation of the input common-mode signal and keeps common mode voltage constant, while transconductance easily tunable through continuous bias voltage. Linearity preserved during tuning process moderate range values. Measurements results 0.35-m design show 1:2 with total harmonic distortion figures at 10 MHz below 58 dB over...
As part of the T-REX project, a number R&D and prototyping activities have been carried out during last years to explore applicability gaseous Time Projection Chambers (TPCs) with Micromesh Gas Structures (Micromegas) in rare event searches like double beta decay, axion research low-mass WIMP searches. While companion paper we focus on this results regarding search for dark matter candidates, both axions WIMPs. Small (few cm wide) ultra-low background Micromegas detectors are used image...
NEXT-MM is a general-purpose high pressure (10 bar, $\sim25$ l active volume) Xenon-based TPC, read out in charge mode with an 8 cm $\times$8 cm-segmented 700 cm$^2$ plane (1152 ch) of the latest microbulk-Micromegas technology. It has been recently commissioned at University Zaragoza as part R&D NEXT $0\nu\beta\beta$ experiment, although experiment's first stage currently being built based on SiPM/PMT-readout concept relying electroluminescence. Around 2 million events were collected during...
Micromegas detectors are an optimum technological choice for the detection of low energy x-rays. The background techniques applied to these yielded remarkable reductions over years, being CAST experiment beneficiary developments. In this document we report on latest upgrades towards further and better understanding detectors' response. encompass readout electronics, a new detector design implementation more efficient cosmic muon veto system. Background levels below 10−6keV-1cm-2s-1 have been...
As part of the T-REX project, a number R&D and prototyping activities have been carried out during last years to explore applicability gaseous Time Projection Chambers (TPCs) with Micromesh Gas Structures (Micromegas) in rare event searches like double beta decay, axion research low-mass WIMP searches. In both this its companion paper, we compile main results project give an outlook application prospects for detection technique. While paper focus on axions WIMPs, regarding measurement decay...
Wireless broadband access networks have been positioning themselves as a good solution for manufacturers and users of IoT (internet things) devices, due mainly to the high data transfer rate required over terminal devices without restriction information format. In this work, review two Radio Fiber strategies is presented. Both excellent performance even offer possibility extend wireless area coverage where mobile do not reach or 802.11 network presents issues. Frequency (RFoF) intermediate...
The application of artificial intelligence (AI) has attracted great interest in higher education, highly influenced by the development information and communication technologies. Integrating into learning ecosystems is one biggest challenges for education. In this work, an intelligent tutoring system based on AI been designed but with control possible responses. For this, a first diagnostic phase was carried out that determined selection initial material will be used neural network or...
Micromesh gas amplification structures (Micromegas) can be used as readout of Time Projection Chambers in the field Rare Event searches dealing with dark matter, double beta decay or solar axions. The topological information events offered by these gaseous detectors is a very powerful tool for signal identification and background rejection. However, this kind experiments radiopurity detector components surrounding materials must thoroughly controlled addition order to keep experimental low...
A new transimpedance amplifier (TIA) for 2.5 Gb/s optical communications fabricated in a standard 0.18 μm CMOS process is presented. The proposed TIA based on conventional structure with an inverting voltage and feedback resistor, but incorporates technique to enhance the input dynamic range prevent from saturation at high currents. According electrical characterization receiver shows sensitivity of −26 dB m BER=10−12, assuming responsivity 1 A/W, power above 26 dB. consumption core only...
A technical description of NEXT-MM and its commissioning first performance is reported. Having an active volume ∼ 35 cm drift × 28 diameter, it constitutes the largest Micromegas-read TPC operated in Xenon ever constructed, made by a sectorial arrangement 4 single wafers manufactured with Microbulk technique to date. It equipped suitably pixelized readout sufficiently large sensitive ( 23 l) so as contain long 20 cm) electron tracks. First results obtained at 1 bar for Trymethylamine...
A CMOS programmable gain amplifier suitable for low-voltage operation over the very high frequency range is presented. The scheme based on a simple common-mode feedforward pseudo-differential pair with resistive loads. Post-layout results 1.8 V–0.18 µm design show linear-in-dB from 0 to 12 dB −3 bandwidth above 1.4 GHz and power consumption below 17 mW all range.
This paper presents an optical receiver for short reach applications, suitable a low-cost transmission channel; plastic fiber. In order to compensate the limited bandwidth due inherent performance of fiber and external photodiode, adaptive equalizer is included in chain. addition, pre postamplifier with gain control provide wide input dynamic range. The prototype implemented standard 0.18μm CMOS process, targets 1.25Gbps error-free sensitivity below -16dBm. total power consumption 110mW at...
A novel receiver front-end is proposed for short-range optical communications over low-cost polymer fiber and, in particular, home area networks. This paper focuses on the experimental verification of IC prototype POFchip-II, implemented a standard 0.18- <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">$\mu$</tex> </formula> m CMOS technology plus commercial Si-PIN photodetector and 1 mm step-index...
This letter proposes a new analog front end for short-reach high-speed optical communications that compensates the limited bandwidth of 1-mm step-index polymer fiber (SI-POF) transmission systems. In particular, has been fabricated using cost-effective digital 0.18- complementary metal-oxide-semiconductor (CMOS) technology and fed with only 1 V. The prototype contains transimpedance amplifier, continuous-time equalizer, an output driver. Experimentally, we have obtained 1.25-Gb/s simple...
This paper presents a new transimpedance amplifier (TIA) for 2.5 Gbit/s optical communications realized in standard 90 nm CMOS process. The proposed TIA is based on conventional structure with an inverting voltage and feedback resistor, but incorporates technique to enhance the input dynamic range prevent saturation at high currents. Post-layout results show sensitivity of -30 dBm BER=10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-12</sup>...
ABSTRACT This article presents a new CMOS receiver analog front‐end for short‐reach high‐speed optical communications, which compensates the limited product bandwidth length of 1‐mm step‐index plastic fiber (SI‐POF) channels (45 MHz · 100 m) and required large‐diameter high‐capacitance Si PIN photodetector (0.8 mm–3 pF). The proposed architecture, formed by transimpedance amplifier continuous‐time equalizer, has been designed in standard 0.18‐µm process with single supply voltage only 1 V,...
A novel MicroMegas detector based on microbulk technology with an embedded XY strip structure was developed, obtained by segmenting both the mesh and anode in perpendicular directions. This results a very low-mass device good energy spatial resolution capabilities. Such is practically "transparent" to neutrons, being ideal for in-beam neutron measurements can be used as quasi-online beam profiler at time-of-flight facilities. dedicated front end electronics acquisition system has been...
A new differential automatic gain control post-amplifier for 10GBase-LX4 Ethernet realised in a 0.18 µm CMOS process is presented. Based on very compact inductorless design, it comprises three cascaded digitally programmable stages followed by bandwidth-enhancement buffer. Results show an overall −3 dB cutoff frequency above 3 GHz over to 33 linear-in-dB controllable range 6 steps with 55 mW power consumption from 1.8 V single supply.