2022-05-20
07:28 |
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2022-05-17
20:50 |
Free Molecule Studies by Perturbed $\gamma - \gamma$ Angular Correlation: A New Path to Accurate Nuclear Quadrupole Moments
/ Haas, Heinz (CERN ; U. Aveiro (main)) ; Röder, Jens (CERN ; U. Aveiro (main)) ; Correia, Joao G (CERN ; IST, Lisbon (main)) ; Schell, J (CERN ; U. Duisburg-Essen) ; Fenta, Abel S (U. Aveiro (main)) ; Vianden, Reiner (Bonn U., HISKP) ; Larsen, Emil M H (U. Copenhagen (main)) ; Aggelund, Patrick A (U. Copenhagen (main)) ; Fromsejer, Rasmus (U. Copenhagen (main)) ; Hemmingsen, Lars B S (U. Copenhagen (main)) et al.
Accurate nuclear quadrupole moment values are essential as benchmarks for nuclear structure models
and for the interpretation of experimentally determined nuclear quadrupole interactions in terms of
electronic and molecular structure. Here, we present a novel route to such data by combining perturbed γ-γ
angular correlation measurements on free small linear molecules, realized for the first time within this
work, with state-of-the-art ab initio electronic structure calculations of the electric field gradient at the
probe site. [...]
2021 - 6 p.
- Published in : Phys. Rev. Lett. 126 (2021) 103001
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2022-05-17
20:50 |
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2022-05-17
20:50 |
Association rules extraction for the identification of functional dependencies in complex technical infrastructures
/ Antonello, Federico (Milan, Polytech.) ; Baraldi, Piero (Milan, Polytech.) ; Shokry, Ahmed (Milan, Polytech. ; Ec. Polytech., Palaiseau (main)) ; Zio, Enrico (Milan, Polytech. ; Paris, Ecole des Mines ; Kyung Hee U.) ; Gentile, Ugo (CERN) ; Serio, Luigi (CERN)
This work proposes a method for identifying functional dependencies among components of complex technical infrastructures using databases of alarm messages. The developed method is based on the representation of the alarm database by a binary matrix, the use of the Apriori algorithm for mining association rules and a new algorithm for identifying groups of functionally dependent components. [...]
2021
- Published in : Reliable Eng. Sys. Safety 209 (2021) 107305
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2022-05-17
20:50 |
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2022-05-17
20:50 |
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2022-05-17
20:50 |
Manufacturing technologies and joining methods of metallic thin-walled pipes for use in high pressure cooling systems
/ McNair, Sophie A M (Bath U.) ; Chaharsooghi, Alborz Shokrani (Bath U.) ; Carnevale, Mauro (Bath U.) ; Rhead, Andrew (Bath U.) ; Onnela, Antti (CERN) ; Daguin, Jerome (CERN) ; Cichy, Kamil (CERN) ; Postema, Hans (Cornell U.) ; Bacchetta, Nicola (CERN) ; French, Thomas (CERN) et al.
Small diameter thin-walled pipes, typically with a diameter less than 20 mm and a ratio of outer diameter to wall thickness is 20 or
above, have increasingly become a key value adding factor for a number of industries including medical applications, electronics
and chemical industries. In high-energy physics experiments, thin-walled pipes are needed in tracking detector cooling systems
where the mass of all components needs to be minimised for physics measurement reasons. [...]
2021 - 15 p.
- Published in : Int. J. Adv. Manuf. Technol. 118 (2021) 667-681
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2022-05-17
20:50 |
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2022-05-17
20:50 |
Very high upper critical fields and enhanced critical current densities in Nb$_3$Sn superconductors based on Nb–Ta–Zr alloys and internal oxidation
/ Buta, F (U. Geneva (main)) ; Bonura, M (U. Geneva (main)) ; Matera, D (U. Geneva (main)) ; Bovone, G (U. Geneva (main)) ; Ballarino, A (CERN) ; Hopkins, S C (CERN) ; Bordini, B (CERN) ; Chaud, X (Natl. High Mag. Field Lab.) ; Senatore, C (U. Geneva (main))
The inhibition of Nb$_3$Sn grain growth in the presence of ZrO$_2$ nanoparticles appears to be one of
the most promising method for pushing the critical current densities of Nb$_3$Sn superconducting
wires to levels that meet the requirements set for the Future Circular Collider. We have investigated
the effect of ZrO$_2$ nanoparticles formed by the internal oxidation of Zr on the superconducting
properties and microstructure of Nb3Sn formed from Nb-1 wt%Zr, Nb-7.5 wt%Ta,
Nb-7.5 wt%Ta-1 wt%Zr and Nb-7.5 wt%Ta-2 wt%Zr alloys. [...]
2021 - 14 p.
- Published in : J. Phys. Mater. 4 (2021) 025003
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2022-05-17
20:50 |
Operating Temperature Range of Phosphorous-Doped Optical Fiber Dosimeters Exploiting Infrared Radiation-Induced Attenuation
/ Morana, A (Lab. Hubert Curien, St. Etienne) ; Campanella, C (Lab. Hubert Curien, St. Etienne) ; Marin, E (Lab. Hubert Curien, St. Etienne) ; Melin, G (FOTON, Lannion) ; Robin, T (FOTON, Lannion) ; Li Vecchi, G (CERN ; Lab. Hubert Curien, St. Etienne) ; Di Francesca, D (CERN ; Lab. Hubert Curien, St. Etienne) ; Boukenter, A (Lab. Hubert Curien, St. Etienne) ; Ouerdane, Y (Lab. Hubert Curien, St. Etienne) ; Mady, F (INPHYNI, Nice) et al.
Point or distributed optical fiber (OF)-based dosimeters can exploit the observed linear dependence of the radiation-induced attenuation (RIA) at 1550 nm in phosphosilicate OFs to monitor the total ionizing dose (TID). The temperature dependence of the radiation sensitivity coefficients at 1550 nm (expressed in dB km$^{-1}$ Gy$^{-1}$) of three phosphorus-doped single-mode OFs has been investigated between -80 °C and 300 °C for TID ranging from 1 Gy to 1 kGy(SiO$_2$). [...]
2021 - 7 p.
- Published in : IEEE Trans. Nucl. Sci. 68 (2021) 906-912
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