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All CERN Accelerators documents

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2025-02-06
08:13
X-LAB: A very high-capacity X-band RF test stand facility at the University of Melbourne / Volpi, Matteo (Melbourne U.) ; Giansiracusa, Paul J (Melbourne U.) ; Sheehy, Suzanne L (Melbourne U. ; ANSTO, Menai) ; Rassoll, Roger P (Melbourne U.) ; Taylor, Geoffrey N (Melbourne U.) ; Pushkarna, Paarangat (Melbourne U.) ; Dowd, Rohan (ANSTO, Menai) ; Valerian, Joel (Melbourne U.) ; Catalan-Lasheras, Nuria (CERN) ; Cherrill, Mark (South Australia U.)
The X-band Laboratory for Accelerators and Beams (X-LAB) has been commissioned at the University of Melbourne. One of the key projects within this laboratory involves re-homing half of the CERN high gradient X-band test stand, XBOX3, now known as Mel-BOX. [...]
2024 - 9 p. - Published in : EPJ Web Conf. 315 (2024) 02007 Fulltext: PDF;
In : International Workshop on Future Linear Colliders (LCWS2024), Tokyo, Jp, 8 Jul - 8 Nov 2024, pp.02007

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2025-02-06
08:13
Prototypes and R&D; for undulator-based positron sources / Moortgat-Pick, Gudrid (Hamburg U. ; DESY) ; Formela, Manuel (Hamburg U.) ; Hamann, Niclas (Hamburg U.) ; Lengler, Tim (HZDR, Dresden) ; Lott, Dieter (HZDR, Dresden) ; Loisch, Gregor (DESY) ; Riemann, Sabine (DESY, Zeuthen) ; Sievers, Peter (CERN) ; Tenholt, Carmen (DESY) ; Yakopov, Grigory (DESY)
The undulator-based positron source is baseline design for the ILC. Recent progress in particular on the undulator mask designs, optic matching devices (R&D; for prototypes for pulsed solenoid, plasma lens) and on the target design (rotating wheel, material tests) are discussed. [...]
2024 - 9 p. - Published in : EPJ Web Conf. 315 (2024) 02002 Fulltext: PDF;
In : International Workshop on Future Linear Colliders (LCWS2024), Tokyo, Jp, 8 Jul - 8 Nov 2024, pp.02002

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2025-02-06
08:13
Optimisation of the CLIC positron capture LINAC taking into account Beam Loading effects / Mesbah, Nafiseh (CERN ; IPM, Tehran) ; Doebert, Steffen (CERN) ; Dayyani Kelisani, Mohsen (CERN ; IPM, Tehran) ; Latina, Andrea (CERN) ; Zhao, Yongke (CERN) ; Herrador, Javier Olivares (CERN)
This paper investigates Beam Loading in the positron source capture Linac of the Compact Linear Collider (CLIC). Beam Loading, caused by interactions between beam with accelerating cavities, leads to a reduction in the accelerating gradient, negatively affecting the Linac performance. [...]
2024 - 8 p. - Published in : EPJ Web Conf. 315 (2024) 02001 Fulltext: PDF;
In : International Workshop on Future Linear Colliders (LCWS2024), Tokyo, Jp, 8 Jul - 8 Nov 2024, pp.02001

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2025-02-04
06:47
Construction and Analysis of a Modified Nb3Sn 11 T Short Dipole Model / Cabrera, Carmen Abad (CERN) ; Perini, Diego (CERN) ; Bampton, Tavis Alexander (CERN) ; Bahmane, Oussama Id (CERN) ; Izquierdo Bermudez, Susana (CERN) ; Bourcey, Nicolas (CERN) ; Devred, Arnaud (CERN) ; Vez, Ruth Diaz (CERN) ; Garion, Cedric (CERN) ; Guinchard, Michael (CERN) et al.
The 5.2-m-long, 11 T double-aperture Nb3Sn Dipole Magnet was designed to replace some of the standard, 15-m-long 8.3 T Nb–Ti main dipole magnets in the Large Hadron Collider. After the production and test of several of 2-m-long models, the test of full-length 11 T series magnets revealed signs of performance degradation in the coil ends after a sequence of electromagnetic and thermal cycles. The possible sources for performance degradation were categorized into two groups: issues internal to the coils and issues with the coil support structure, in particular in the magnet ends. [...]
2025 - 7 p. - Published in : IEEE Trans. Appl. Supercond. 35 (2025) 1-7 Fulltext: PDF;

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2025-02-04
06:47
Numerical Optimization of 6D Cooling Solenoids for a Muon Collider / Fabbri, S (CERN) ; Bottura, L (CERN) ; Statera, M (LASA, Segrate)
In the current most evolved design concept of a machine for accelerating and colliding muons, there exists two long (∼1 km) channels for cooling newly created muons and antimuons. Termed the ‘6D cooling channels’, the beam is cooled in momentum and position space using a series of alternating polarity solenoids which create an oscillating field in the beam direction, absorbers and radio-frequency cavities. [...]
2025 - 7 p. - Published in : IEEE Trans. Appl. Supercond. 35 (2025) 1-7 Fulltext: PDF;

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2025-02-04
06:47
Performance of a HL-LHC Nb$_3$Sn Quadrupole Magnet in the 100–200 MPa Range of Azimuthal Stress / Mangiarotti, F J (CERN) ; Izquierdo Bermudez, S (CERN) ; Devred, A (CERN) ; Diaz Vez, R (CERN) ; Ferradas Troitino, J (CERN) ; Ferradas Troitino, S (CERN) ; Feuvrier, J (CERN) ; Guinchard, M (CERN) ; Haziot, A (CERN) ; Milanese, A (CERN) et al.
With the assembly and test results of four Nb$_\text{3}$Sn short-model quadrupoles (MQXFS) for the High Luminosity Upgrade of the CERN Large Hadron Collider (LHC), an optimum pre-load level was established for the construction of the full-length, series magnets. Successive MQXFS magnets were used as testbeds for potential changes (including pre-load fine tuning) to be implemented in the series, and to better understand the stress dependence of Nb$_\text{3}$Sn magnet performance. [...]
2025 - 7 p. - Published in : IEEE Trans. Appl. Supercond. 35 (2025) 4000307 Fulltext: PDF;

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2025-02-04
06:47
Preliminary Design of a Block-Coil Magnet for the Muon Collider Ring / Alfonso, Luca (INFN, Genoa) ; Bersani, Andrea (INFN, Genoa) ; Bottura, Luca (CERN) ; Caiffi, Barbara (INFN, Genoa) ; Farinon, Stefania (INFN, Genoa) ; Gagno, Andrea (INFN, Genoa) ; Levi, Filippo (INFN, Genoa) ; Mariani, Francesco (INFN, Milan ; U. Rome La Sapienza (main)) ; Mariotto, Samuele (INFN, Milan ; Milan Bicocca U.) ; Musenich, Riccardo (INFN, Genoa) et al.
In the framework of the IMCC (International Muon Collider Collaboration), a feasibility study for a collider ring 10 km long with muons having a center of mass energy of 10 TeV is currently being carried out. The superconducting magnets represent one of the most challenging components of the collider stage of such a facility: indeed, the need for high fields, large apertures and dipole + quadrupole combined function require technological choices at the edge of the status of the art. [...]
2025 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 35 (2025) 4000405

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2025-02-04
06:47
Laser-Induced Quench Study of the Magneto-Thermal Stability of Nb$_3$Sn Wires / Kuczynska, J H (CERN ; Geneva U.) ; Hopkins, S C (CERN) ; Senatore, C (Geneva U.) ; Boutboul, T (CERN)
In the pursuit of developing 14+ T Nb$_3$Sn magnets for a future energy-frontier circular collider, there is a growing demand for wires with enhanced critical current density (Jc), larger diameters, and lower copper-to-non-copper ratios. These requirements pose significant challenges to maintaining magnetothermal stability of the superconducting wires. [...]
2025 - 6 p. - Published in : IEEE Trans. Appl. Supercond. 35 (2025) 1-6 Fulltext: PDF;

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2025-02-04
06:47
Mechanical Design of a ReBCO Non/Metal-Insulated 40 T Solenoid for the Muon Collider / Accettura, C (CERN) ; Bertarelli, A (CERN) ; Bordini, B (CERN) ; Bottura, L (CERN) ; Dudarev, A (CERN) ; Kolehmainen, A (CERN) ; Mulder, T (CERN) ; Sanda, F (CERN) ; Vernassa, G (CERN)
In the framework of the design studies of a Muon Collider (MuC), the design of Ultra-High-Field (UHF) magnets is a crucial part, particularly for the MuC's final cooling stage. To address this, CERN has recently introduced a conceptual design for a 40 T solenoid characterized by very compact pancake coils. [...]
2025 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 35 (2025) 4600305 Fulltext: PDF;

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2025-02-04
06:47
Evaluating the Electro-Magnetic Effects of Electrical Short-Circuits in a Nb-Ti Accelerator Magnet / Reynaud, V (CERN ; Polytech. Turin) ; Farinon, S (INFN, Genoa) ; Janitschke, M (CERN ; U. Rostock) ; Ravaioli, E (CERN) ; Verweij, A P (CERN) ; Willering, G (CERN) ; van Rienen, U (U. Rostock)
Electrical short-circuits in the coil winding pack of a superconducting magnet can severely impact the magnet's performance and safety during operation. Hence, finding ways to detect and assess these non-conformities is essential. [...]
2025 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 35 (2025) 4700405 Fulltext: PDF;

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