2025-06-13
04:03 |
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2025-05-29
08:37 |
Hardware design of a high-current, high step-down ratio Series Capacitor Buck converter prototype for slow-ramped powering of High-Luminosity Large Hadron Collider inner triplet superconducting electromagnets
/ Otero-Olavarrieta, Alberto (Basque U., Bilbao) ; Matallana, Asier (Basque U., Bilbao) ; Martínez de Alegría, Iñigo (Basque U., Bilbao) ; Ibarra, Edorta (Basque U., Bilbao) ; Arias, Antoni (Barcelona, Polytechnic U.) ; de Mallac, Louis (CERN) ; Pittet, Serge (CERN)
In this work, the main hardware design aspects of a slow-ramped DC/DC power converter prototype, developed to feed superconducting inner triplet (IT) electromagnets for the High Luminosity (HL) upgrade of the Large Hadron Collider (LHC), is presented. The proposal comprises a two-quadrant multiphase interleaved converter, based on the Series Capacitor Buck architecture, which operates at very high-current and high step-down ratio conditions. [...]
2024 - 19 p.
- Published in : Appl. Energy 371 (2024) 123730
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2025-05-29
08:37 |
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2025-05-21
06:01 |
Complex Impedance of the LHC Main Dipole Magnet in the Presence of Artificial Short Circuits
/ Janitschke, M (CERN ; U. Rostock) ; Ravaioli, E (CERN) ; Verweij, A P (CERN) ; Willering, G (CERN) ; van Rienen, U (U. Rostock)
Interturn short circuits inside the coil-winding pack of superconducting magnets can lead to severe damage to the magnet during a quench or fast current ramps. Investigating their impact and finding ways to detect these nonconformities could save considerable run-time of an accelerator. [...]
2025 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 35 (2025) 4002905
Fulltext: PDF;
In : Applied Superconductivity Conference (ASC 2024), Salt Lake City, Utah, United States, 1 - 6 Sep 2024, pp.4002905
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2025-05-09
11:54 |
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2025-05-09
09:44 |
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2025-05-08
06:04 |
Impact of high-intensity LHC beam operation on warm vacuum modules
/ Antuono, C (CERN) ; Krkotić, P (CERN) ; de la Fuente Garcia, E (CERN) ; Zannini, C (CERN) ; Calatroni, S (CERN) ; Baglin, V (CERN) ; Bregliozzi, G (CERN) ; Chiggiato, P (CERN) ; Galloro, A (CERN) ; Giacomel, L (CERN) et al.
During the third run of the Large Hadron Collider in 2023, which had the highest intensity bunch population compared to previous runs, a beam dump incident with operational delays occurred due to increased losses attributed to pressure spikes within a warm vacuum sector. Subsequent inspections revealed localized annealing and plasticization of the tension spring in the sliding contact radio frequency finger of a 212 mm diameter vacuum module, alongside traces of vapor deposition on the various module components with the stainless steel spring material. [...]
2025 - 12 p.
- Published in : Phys. Rev. Accel. Beams 28 (2025) 041001
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2025-04-30
10:54 |
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2025-04-24
11:01 |
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LHC MD #12263 - Weak-Strong investigation of Long-Range Beam-beam
/ Persson, Tobias Hakan Bjorn (CERN) ; Buffat, Xavier (CERN) ; Carlier, Felix Simon (CERN) ; Burkhardt, Felix (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Dilly, Joschua Werner (CERN) ; Hostettler, Michi (CERN) ; Kar, Ujani (University of Applied Sciences (DE)) ; Maclean, Ewen Hamish (CERN) ; Tomas Garcia, Rogelio (CERN)
During the intensity ramp-up in 2024, it was revealed that the collimation hierarchy was broken under normal operational conditions with bunch trains. [...]
CERN-ACC-NOTE-2025-0011.
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2025
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2025-04-24
10:54 |
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