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2026-06-13
10:58
Inception of evaporative dryout for CO2 in milliscale pipe flows / Cantini, Giulio (Bath U. ; CERN) ; Hellenschmidt, Desiree (CERN) ; Pedano, Camila (CERN) ; Petagna, Paolo (CERN) ; Sangan, Carl (Bath U.) ; Carnevale, Mauro (Bath U. ; CERN)
Carbon dioxide is a cost-effective, reliable and environmentally-friendly refrigerant with increasing employment in evaporator design. A clear understanding of the underlying flow physics, coupled with robust prediction of phase change through boiling, is necessary to enable widespread uptake of CO2 as a coolant. In scenarios such as nuclear reactors or thermal management in silicon detectors (e.g., Large Hadron Collider at CERN), employing saturated CO2 in milliscale pipes introduces further uncertainties in the design process, particularly regarding its behaviour at high vapour quality. [...]
2025 - 17 p. - Published in : Int. J. Heat Mass Transf. 251 (2025) 127299 Fulltext: PDF;

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2026-06-13
10:58
Assessing the Usefulness of Assurance Cases: Experience With the Large Hadron Collider / Viger, Torin (U. Toronto (main)) ; Joyce, Jeff ; Diemert, Simon ; Menghi, Claudio (Bergamo U. ; McMaster U.) ; Chechik, Marsha (U. Toronto (main)) ; Uythoven, Jan (CERN) ; Zerlauth, Markus (CERN) ; Felsberger, Lukas (CERN)
ABSTRACT Assurance cases (ACs) are structured arguments designed to show that a system is sufficiently reliable to function properly in its operational environment. They are mandated by safety standards and are largely used in industry to support risk management for systems; however, ACs often contain proprietary information and are not publicly available. [...]
2025 - 15 p. - Published in : Syst. Eng. 29 (2025) 99-113 Fulltext: PDF;

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2026-06-13
10:58
The New EU Project PACRI Aims to Advance Plasma Accelerator Technologies and Light Sources / Gerardo, D'Auria ; Nuria, Catalan-Lasheras (CERN) ; Massimo, Ferrario ; Brigitte, Cros ; Leonida Antonio, Gizzi ; Maria Stefania, De Vido ; Cecilia, Blasetti ; Renato, Gioppo ; Carsten, Welsch ; Ricardo, Torres
Anew EU-funded project, to develop ad-vanced plasma accelerator technologies,PACRI (Plasma Accelerator Systems forCompact Research Infrastructure) started inMarch with the kickoff meeting held in Trieste(Italy) from March 12th to 14th.PACRI project aims to reduce the size, en-ergy consumption, environmental impact,and costs of future accelerator facilities. It isa collaborative effort involving 19 universi-ties and international research laboratories,supported by seven industrial partners. [...]
2025 - 2 p. - Published in : Synchrotron Radiat. News 38 (2025) 65-66 Fulltext: PDF;

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2026-06-11
15:53
CERN Accelerator School course on "Beam Instrumentation" - Proceedings of the CERN Accelerator School course: Beam Instrumentation   16 - 29 Nov 2025  - Split, Croatia  / Caraban Gonzalez, N. (ed.); Filippova, M. (ed.); Rivoiron, D. (ed.); Tecker, F. (ed.); Völlinger, C. (ed.)
The specialised course on "Beam Instrumentation" is a core subject of the topical course series of the CERN Accelerator School (CAS). Beam Instrumentation is essential in any particle accelerator. [...]
Geneva : CERN, 2025

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2026-06-11
06:01
Fault-Tolerant Control of a Multiphase Series Capacitor Buck Converter in a Master–Slave Configuration for Powering a Particle Accelerator Electromagnet / Ibarra, Edorta (Basque U., Bilbao) ; Arias, Antoni (Barcelona, Polytechnic U.) ; Martínez de Alegría, Iñigo (Basque U., Bilbao) ; Otero-Olavarrieta, Alberto (Rioja U.) ; Matallana, Asier (Basque U., Bilbao) ; de Mallac, Louis (CERN)
Multiphase DC/DC power converter architectures have recently been investigated for powering the superconducting electromagnets in the High-Luminosity (HL) upgrade of the Large Hadron Collider (LHC) at CERN, targeting high-performance figures and reliability. In terms of control, a master–slave voltage/current regulation configuration was previously proposed by the authors as an alternative to other well-known cascaded options. [...]
2025 - 17 p. - Published in : Electronics 14 (2025) 924 Fulltext: PDF;

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2026-06-11
06:01
RF for accelerators: RF power generation, RF power transport, RF power couplers / Montesinos, Eric (CERN)
This paper reviews the main types of radio-frequency powering systems which may be used for accelerators. [...]
arXiv:2606.10643. - 2026 - 41.
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2026-06-11
06:01
Probing Nucleon Spin Structure with a Polarized Gamma Beam from Compton Backscattering at FCC-ee / Canbay, A C (Ankara U.) ; Sultansoy, S (TOBB ETU, Ankara) ; Zimmermann, F (CERN)
We present a kinematic and optical design of a high-energy polarized gamma-ray facility based on Compton backscattering of lasers against the FCC-ee electron beams in its $Z$, $WW$, $ZH$ and $t\bar{t}$ modes. [...]
arXiv:2606.04805. - 2026 - 17.
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2026-06-10
06:36
Particle adhesion assessment based on a diverted use of laser shock adhesion test (LASAT) to apply inertia force relying on dynamics of the sample macroscopic surface / Baudin, Lucie (CERN) ; Garion, Cedric (CERN) ; Chiggiatto, Paolo ; Delloro, Francesco (Paris, Ecole des Mines) ; Jeandin, Michel (Paris, Ecole des Mines) ; Thorel, Alain (Paris, Ecole des Mines) ; Boustie, Michel (CNRS, France)
Laser-assisted surface structuring was developed at CERN for the treatment of the inside wall of the vacuum system of the Large Hadron Collider (LHC). 50-µm-deep grooves were created by material ablation while the laser scanned the surface. [...]
2024 - 4 p. - Published in : Proc. SPIE 12939 (2024) 129390L

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2026-06-10
06:36
Efficient Finite Element Models for Milliken Conductors Using Homogenization Techniques Based on Helicoidal Symmetry / Piwonski, Albert (Berlin, Tech. U.) ; Dular, Julien (CERN) ; Sabariego, Ruth V (Leuven U. ; Unlisted, BE) ; Rezende, Rodrigo Silva (Berlin, Tech. U.) ; Schuhmann, Rolf (Berlin, Tech. U.)
Milliken-type conductors are the predominant design for the inner conductor of high-voltage AC power cables beyond a certain cross-sectional area. Their complex geometric structure gives rise to multiscale problems that pose significant challenges in the numerical modeling of their electromagnetic behavior. [...]
2025 - 1 p. - Published in : 10.1109/tmag.2025.3612306 Fulltext: PDF; External link: Fulltext

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2026-06-10
06:36
Operation of CERN’s major tests facility with upgraded cryogenic infrastructure for superconducting magnets, power links, inner triplets String and radio-frequency cavities for HL-LHC / Mauny, R (CERN) ; Barbe, T (CERN) ; Dupont, T (CERN) ; Ferrand, F (CERN) ; Gahier, V (CERN) ; Gery, J (CERN) ; Guillotin, N (CERN) ; Perin, A (CERN) ; Onufrena, A (CERN) ; Pirotte, O (CERN)
The largest cryogenic multipurpose test facility at CERN (SM18), recently significantly upgraded, provides helium refrigeration capacity for testing at nominal conditions, superconducting magnets, power links, radiofrequency (RF) cavities and the IT String (Inner Triplet) for the High Luminosity-Large Hadron Collider (HL-LHC) upgrade project, towards increased luminosity at interaction points 1 (ATLAS) and 5 (CMS) in the LHC accelerator. The SM18 cryogenics infrastructure and test benches have been progressively upgraded along the last 8 years to meet the technical requirements of the HL-LHC project. [...]
2026 - 8 p. - Published in : IOP Conf. Ser. Mater. Sci. Eng. 1344 (2026) 012140 Fulltext: PDF;
In : 26th Joint Cryogenic Engineering Conference and International Cryogenic Materials Conference, Peppermill Reno Resort, Reno, Nevada, United States, 18 - 22 May 2025, pp.012140

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