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Final Design of ITER In-Vessel Coils and Manufacturing of In-Vessel Coil Conductor
/ Encheva, Anna (ITER) ; Bontemps, Vincent (ITER) ; Fichera, Claudio (ITER) ; Laquiere, Julien (ITER) ; Macioce, Davide (ITER) ; Mariani, Nicola (ITER) ; Piccin, Roland (ITER) ; Tronza, Vladimir (ITER) ; Vostner, Alexander (ITER) ; Sgobba, Stefano (CERN)
Following a decision made at the ITER Council in November 2013, two types of in-vessel coils (IVCs), namely, edge-localized mode (ELM) coils to mitigate ELMs and vertical stability (VS) coils to provide vertical stabilization of the plasma, have been incorporated in the ITER baseline design. The in-vessel environment is severe, characterized by large transient electromagnetic fields, high radiation flux, and high temperature. [...]
2022 - 6 p.
- Published in : IEEE Trans. Plasma Sci. 50 (2022) 4298-4303
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Dynamic Response of Advanced Materials Impacted by Particle Beams: The MultiMat Experiment
/ Pasquali, M (CERN) ; Bertarelli, A (CERN) ; Accettura, C (CERN ; Milan Polytechnic) ; Berthome, E (CERN) ; Bianchi, L (CERN) ; Bolz, P (Darmstadt, GSI) ; Carra, F (CERN) ; Fichera, C (BIAM, St Paul lez Durance) ; Frankl, M I (CERN) ; Furness, T (Huddersfield U.) et al.
The introduction at CERN of new extremely energetic particle accelerators, such as the high-luminosity large hadron collider (HL-LHC) or the proposed future circular collider (FCC), will increase the energy stored in the circulating particle beams by almost a factor of two (from 360 to 680 MJ) and of more than 20 (up to 8500 MJ), respectively. In this scenario, it is paramount to assess the dynamic thermomechanical response of materials presently used, or being developed for future use, in beam intercepting devices (such as collimators, targets, dumps, absorbers, spoilers, windows, etc.) exposed to potentially destructive events caused by the impact of energetic particle beams. [...]
publ - 30 p.
- Published in : J. Dynamic Behavior Mater. 5 (2019) 266-295
External link: Fulltext from publisher
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Simulation of hydrodynamic tunneling induced by high-energy proton beam in copper by coupling computer codes
/ Nie, Y (CERN) ; Fichera, C (CERN) ; Mettler, L (CERN) ; Carra, F (CERN) ; Schmidt, R (CERN) ; Tahir, N A (Darmstadt, GSI) ; Bertarelli, A (CERN) ; Wollmann, D (CERN)
The design of machine protection systems for high-energy accelerators with high-intensity beams requires analyzing a large number of failures leading to beam loss. One of the most serious failures is an accidental impact of a large number of bunches at one location, for example, due to a deflection of the particle beams by the extraction kicker magnets with the wrong strength. [...]
2019 - 16 p.
- Published in : Phys. Rev. Accel. Beams 22 (2019) 014501
Fulltext from Publisher: PDF;
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5.
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Simulation of Hydrodynamic Tunneling Caused by High-Energy Proton Beam in Copper through Coupling of FLUKA and Autodyn
/ Nie, Yuancun (CERN) ; Bertarelli, Alessandro (CERN) ; Carra, Federico (CERN) ; Fichera, Claudio (CERN) ; Mettler, Linus (UC, Berkeley (main)) ; Schmidt, Ruediger (Darmstadt, Tech. U.) ; Wollmann, Daniel (CERN)
For machine protection of high-energy colliders, it is important to assess potential damages caused to accelerator components in case large number of bunches are lost at the same place. The numerical assessment requires an iterative execution of an energy-deposition code and a hydrodynamic code, since the hydrodynamic tunneling effect will likely play an important role in the beam-matter interactions. [...]
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-MOPMF046
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMF046
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7.
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Dynamic Testing and Characterization of Advanced Materials in a New Experiment at CERN HiRadMat Facility
/ Bertarelli, Alessandro (CERN) ; Accettura, Carlotta (CERN ; Milan Polytechnic) ; Berthomé, Emmanuel (CERN) ; Bianchi, Laura (CERN) ; Bolz, Philipp (Darmstadt, GSI) ; Carra, Federico (CERN) ; Fichera, Claudio (CERN) ; Frankl, Matthias (CERN) ; Furness, Thomas (Huddersfield U.) ; Gobbi, Giorgia (CERN) et al.
An innovative and comprehensive experiment (named “Multimat”) was successfully carried out at CERN HiRadMat facility on 18 different materials relevant for Collimators and Beam Intercepting Devices. Material samples, tested under high intensity proton pulses of 440 GeV/c, exceeding the energy density expected in HL-LHC, ranged from very light carbon foams to tungsten heavy alloys, including novel composites as graphite/carbides and metal/diamond without and with thin-film coatings. [...]
CERN-ACC-2018-064.-
2018 - 8 p.
- Published in : (2018) , pp. WEPMF071
- Published in : J. Phys.: Conf. Ser. 1067 (2018) 082021
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPMF071
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Recent Developments with the GTS-LHC ECR Ion Source at CERN
/ Toivanen, Ville (CERN) ; Bellodi, Giulia (CERN) ; Fichera, Claudio (CERN) ; Küchler, Detlef (CERN) ; Lombardi, Alessandra (CERN) ; Maintrot, Marc (CERN) ; Michet, Alice (CERN) ; O'Neil, Michael (CERN) ; Sadovich, Sergey (CERN) ; Tarvainen, Olli (Jyvaskyla U.) et al.
Linac3 is the first link in the chain of accelerators providing highly charged heavy ion beams for the CERN experimental program. The beams, predominantly lead, are produced with the GTS-LHC 14.5 GHz Electron Cyclotron Resonance (ECR) ion source, operated in afterglow mode. [...]
2017 - 5 p.
- Published in : 10.18429/JACoW-ECRIS2016-WEAO01
Fulltext: PDF;
In : 22nd International Workshop on ECR Ion Sources, Busan, South Korea, 28 Aug - 1 Sep 2016, pp.WEAO01
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10.
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Characterisation of the Mechanical Behaviour of Superconducting Cables Used in High Field Magnets From Room Temperature Down to 77K
/ Sacristan De Frutos, Oscar (CERN) ; Daly, Michael (CERN) ; Ferracin, Paolo (CERN) ; Fichera, Claudio (CERN) ; Guinchard, Michael (CERN) ; Mikkola, Tommi (CERN) ; Savary, Frederic (CERN) ; Vallone, Giorgio (CERN)
A comprehensive knowledge of the mechanical properties of the superconducting cable used in high-field magnets is of paramount importance to study and model the behaviour of the magnet coil from assembly to the operational conditions at cryogenic temperature. The mechanical characterisation of such kind of materials presents practical challenges associated with the heterogeneity of the materials, the geometry, size and quality of the samples that can be produced out of actual cables. [...]
CERN-ACC-2017-242.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-WEPVA112
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.WEPVA112
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