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Post-irradiation examination of a prototype tantalum-clad target for the Beam Dump Facility at CERN
/ Griesemer, Tina (CERN) ; Franqueira Ximenes, Rui (CERN) ; Arnau Izquierdo, Gonzalo (CERN) ; Aviles Santillana, Ignacio (CERN) ; Brehm, Thomas (Erlangen - Nuremberg U.) ; Gallifa Terricabras, Adria (CERN) ; Höll, Stefan (CERN) ; Jacobsson, Richard (CERN) ; Kaiser, Marco (Erlangen - Nuremberg U.) ; Kuchar, Roman (Erlangen - Nuremberg U.) et al.
The Beam Dump Facility (BDF) is a planned fixed-target installation in CERN's North Area, set to start operating in 2031. [...]
arXiv:2410.01964.
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Advanced examination of Nb$_{3}$Sn coils and conductors for the LHC luminosity upgrade: a methodology based on computed tomography and materialographic analyses
/ Santillana, I Aviles (CERN) ; Sgobba, S (CERN) ; Crouvizier, M D (CERN) ; Devred, A (CERN) ; Izquierdo, G Arnau (CERN) ; Bulat, B (CERN) ; Moros, A (CERN) ; Izquierdo Bermudez, S (CERN) ; Milanese, A (CERN) ; Savary, F (CERN) et al.
The future of particle accelerators is strongly linked to the development of high—field magnets. The European Organization for Nuclear Research (CERN) is currently developing Nb$_{3}$Sn-based magnets for the high-luminosity upgrade of the large hadron collider (HL-LHC), to fully exploit its potential and surpass the intrinsic performance limitations of Nb–Ti-based magnets. [...]
2024 - 14 p.
- Published in : Supercond. Sci. Technol. 37 (2024) 085007
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Optimizing the Manufacture of High-Purity Niobium SRF Cavities Using the Forming Limit Diagram: A Case Study of the HL-LHC Crab Cavities RFD Pole
/ Gallifa Terricabras, Adrià (CERN) ; Aviles Santillana, Ignacio (CERN) ; Barrière, Simon (CERN) ; Cano-Pleite, Eduardo (Carlos III U., Madrid) ; Garlasché, Marco (CERN) ; Narduzzi, Manuele (Fermilab) ; Pfeiffer, Stephan (CERN) ; Prever-Loiri, Laurent (CERN) ; Swieszek, Joanna (CERN ; U. Heidelberg (main))
The Crab Cavities are key components of the High Luminosity Large Hadron Collider (HL-LHC) project at CERN, which aims to increase the integrated luminosity of the LHC, the world’s largest particle accelerator, by a factor of ten. This paper explores the application of the Forming Limit Diagram (FLD) to enhance the manufacturing process of complex-shape Nb-based cavities, with a focus on the formability challenges experienced with the pole of the Radio Frequency Dipole (RFD) Crab Cavities. [...]
FERMILAB-CONF-23-769.-
2023 - 7 p.
- Published in : JACoW SRF 2023 (2023) 627-633
Fulltext: PDF;
In : 21st International Conference on Radio-Frequency Superconductivity (SRF 2023), Grand Rapids, MI, United States, 22 - 30 Jun 2023, pp.627-633
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Analysis of the Leakage Events in the Thermal Shield Cooling Pipes of the ITER Magnet System
/ Sgobba, Stefano (CERN) ; Santillana, Ignacio Aviles (CERN) ; Celuch, Michal (CERN) ; Crouvizier, Mickaël (CERN) ; Perez Fontenla, Ana Teresa (CERN) ; Castro, Enrique Rodriguez (CERN) ; Mitchell, Neil (Euratom, St. Paul Lez Durance) ; Koizumi, Norikiyo (Euratom, St. Paul Lez Durance) ; Pearce, Robert (Euratom, St. Paul Lez Durance) ; Worth, Liam (Euratom, St. Paul Lez Durance) et al.
The ITER Thermal Shields (TS) consist of actively cooled stainless steel panels. Their role is to minimise the radiation heat load from warm components, such as the Vacuum Vessel (VV) and the cryostat, hence contributing to insulating the magnet system operating at 4.5 K. [...]
2024 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4203405
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Weld Qualification of the Cold Mass of the Superconducting Quadrupoles Magnets (MQXF) for the HL-LHC Project
/ Castro, Enrique Rodriguez (Carlos III U., Madrid) ; Aviles Santillana, Ignacio (CERN) ; Sgobba, Stefano (CERN) ; Izquierdo, Gonzalo Arnau (CERN) ; Bonnin, Simon (CERN) ; Bampton, Tavis (CERN) ; Prin, Herve (CERN) ; Todesco, Ezio (CERN) ; Navas, Elisa Maria Ruiz (Carlos III U., Madrid)
The High Luminosity Large Hadron Collider (HL-LHC) is a major upgrade to the existing Large Hadron Collider (LHC) at CERN, aimed at increasing the integrated luminosity of the collider by a factor of ten [1]. A key component of the HL-LHC are the superconducting Nb3Sn quadrupole magnets, known as MQXF, whose purpose is to focus the particle beam [3]. [...]
2024 - 4 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 9000904
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Environmental Stress Cracking of Thermoplastic Polyimide Insulated Wires
/ Piccin, R (CERN) ; Rigaud, J S (CERN) ; Santillana, I A (CERN) ; Buchanan, K E (CERN) ; Ternova, D (CERN) ; Mitchell, N (Euratom, St. Paul Lez Durance) ; Liao, M (Euratom, St. Paul Lez Durance) ; Luongo, C (EUROfusion Consortium, Garching)
Polyimide is often the first choice to insulate instrumentation and magnet wires working under demanding environmental and operating conditions since it shows good mechanical properties at low temperatures and high radiation resistance. Nevertheless, we have recently discovered that thermoplastic polyimide (TPI) insulated wires may suffer an accelerated brittle failure from a combination of environmental and mechanical stress, summarized as environmental stress cracking (ESC). [...]
2024 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 7700405
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Design development and technological R&D; for niobium-cladded beam production targets
/ Griesemer, T (CERN) ; Gallifa Terricabras, A (CERN) ; Perez Fontenla, A T (CERN) ; Mazzola, G (CERN) ; Arnau-Izquierdo, G (CERN) ; Aviles Santillana, I (CERN) ; Esposito, Luigi Salvatore (CERN) ; Calviani, M (CERN) ; Cusworth, M (Sheffield U.) ; Mena Andrade, R (CERN) et al.
High power particle producing target components in research facilities often consist of refractory metals. They experience challenging thermo-mechanical conditions and therefore require dedicated cooling systems. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) THPM017
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.THPM017
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Advanced ultrasonic examination of heavy–gauge high strength studs for the ITER toroidal field gravity supports
/ Santillana, I Aviles (CERN) ; Izquierdo, G Arnau (CERN) ; Bonnin, S (Neuchatel U.) ; Celuch, M (CERN) ; Castro, E Rodriguez (CERN ; Carlos III U., Madrid) ; Sgobba, S (CERN) ; Beemsterboer, C (Euratom, St. Paul Lez Durance) ; Liao, M (Euratom, St. Paul Lez Durance) ; Schild, T (Euratom, St. Paul Lez Durance) ; Han, S (Euratom, St. Paul Lez Durance) et al.
The ITER Tokamak will include the largest superconducting magnet system ever built, with 50 GJ of stored energy. A series of structural elements guarantee its integrity under extreme load and temperature conditions. [...]
2023 - 4 p.
- Published in : Fusion Eng. Des. 194 (2023) 113900
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