Diego Alvarez Feito

Diego Alvarez Feito
European Organization for Nuclear Research | CERN · Physics Department (PH)

Doctor of Philosophy

About

20
Publications
5,626
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185
Citations

Publications

Publications (20)
Article
Full-text available
This paper reports on an experimental investigation on a very large, bolted beam-to-column steel joint that will be extensively used in a new experimental facility for the study of neutrinos (DUNE experiment), hosted by the U.S. Department of Energy's Fermilab. The dimensions of the members (HL 1100 in S460 steel) are uncommonly large at an experim...
Article
Full-text available
The LHCb VELO Upgrade I, currently being installed for the 2022 start of LHC Run 3, uses silicon microchannel coolers with internally circulating bi-phase CO2for thermal control of hybrid pixel modules operating in vacuum. This is the largest scale application of this technology to date. Production of the microchannel coolers was completed in July...
Preprint
Full-text available
The LHCb VELO Upgrade I, currently being installed for the 2022 start of LHC Run 3, uses silicon microchannel coolers with internally circulating bi-phase \cotwo for thermal control of hybrid pixel modules operating in vacuum. This is the largest scale application of this technology to date. Production of the microchannel coolers was completed in J...
Article
Full-text available
The design of detectors used for experiments in high-energy physics requires a light, stiff, and efficient cooling system with a low material budget. The use of silicon microchannel cooling plates has gained considerable interest in the last decade. In this study, we propose the development of silicon microchannel cooling frames studied within the...
Preprint
Full-text available
The GigaTracKer (GTK) is the beam spectrometer of the CERN NA62 experiment. The detector features challenging design specifications, in particular a peak particle flux reaching up to 2.0 MHz/mm$^2$, a single hit time resolution smaller than 200 ps and, a material budget of 0.5% X$_0$ per tracking plane. To fulfill these specifications, novel techno...
Article
The Gigatracker is the NA62 beam tracker. It is made of three 63.1mm×29.3mm stations of 300μm×300μm hybrid silicon pixel detectors installed in vacuum (∼10 ⁻⁶ mbar). The beam particles, flowing at 750MHz, are traced in 4-dimensions by mean of time-stamping pixels with a design resolution of 200ps. This performance has to be maintained despite the b...
Article
The NA62 experiment at the CERN SPS is a fixed target experiment designed to measure the branching ratio of the ultra-rare Kaon decay K+→π+νν̄. The experiment uses an high-momentum K+ decay in-flight technique to increase the rejection power of the main background: K+→π+π0. The Gigatracker is a hybrid silicon pixel detector, exposed to a 750 MHz hi...
Article
The fracture resistance, Gc, of adhesively bonded joints is known to vary significantly with loading mode and because joints are usually subject to mixed-mode loading in service, it is essential to be able to partition Gc into its I/II components so the appropriate failure criterion can be derived. Various partitioning schemes have been proposed in...
Article
Full-text available
The GigaTracker is a hybrid silicon pixel detector built for the NA62 experiment aiming at measuring the branching fraction of the ultra-rare kaon decay K+→π+νν¯ at the CERN SPS. The detector has to track particles in a beam with a flux reaching 1.3MHz/mm2 and provide single-hit timing with 200ps RMS resolution for a total material budget of less t...
Article
Silicon micro-channel cooling is being studied for efficient thermal management in application fields such as high power computing and 3D electronic integration. This concept has been introduced in 2010 for the thermal management of silicon pixel detectors in high energy physics experiments. Combining the versatility of standard micro-fabrication p...
Article
Full-text available
In recent years cohesive elements, coupled with a finite-element analysis (FEA) approach, have become increasingly popular for simulating both delamination in composite materials and fracture in adhesively-bonded joints. However, the industrial application of Cohesive Zone Models to model large and complex structures has been hindered by the requir...
Conference Paper
Full-text available
There exists considerable experimental evidence that suggests that the adhesive fracture energy (Gc) generally depends on the fracture mode. Knowledge of this variation is essential to accurately predict the performance of bonded structures, which often fail under mixed mode conditions. Given that it is impractical to test all possible ratios, the...
Conference Paper
Full-text available
The high values of toughness for rubber-toughened epoxies and other filled adhesives arise from many different failure mechanisms occurring during crack growth in these materials which all combine to absorb energy and increase toughness. Modelling the toughness of such materials must attempt to include all the mechanisms involved. We have now devel...
Thesis
Adhesive bonding has emerged as an appealing technique to join carbon fibre-reinforced plastics (CFRP) to other structural parts. The advantages that adhesive bonding offers include an even stress distribution, weight saving and superior fatigue resistance when compared to more traditional methods of joining. However, despite these advantages, the...

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