CERN Accelerating science

Accelerator Physics

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2024-03-26
13:31
Project of the PS beam for ν oscillations : Experiments: Layout and optics / Dumollard, D ; Lazeyras, P ; Simon, D J
CERN-PS-MU-EP-Note-81-6; PS-MU-EP-Note-81-6.- Geneva : CERN, 1981 - 16 p. Fulltext: PDF;

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2024-03-26
07:03
Design and Manufacturing of an HTS Helical Undulator Demonstrator for Compact FELs / Richter, S C (CERN ; KIT, Karlsruhe) ; Ballarino, A (CERN) ; Bernhard, A (KIT, Karlsruhe) ; Müller, A S (KIT, Karlsruhe)
Among all superconducting undulator geometries, a helical undulator provides a very compact geometry and further is more effective in producing synchrotron radiation, providing circularly polarized photons, which are widely usable for synchrotron radiation users. These characteristics make it a very attractive option for realizing more compact free-electron lasers, requiring a combination of short-period and high-field undulators to produce coherent light up to X-rays. [...]
2024 - 7 p. - Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4101507 Fulltext: PDF;

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2024-03-25
14:53
Possible installation of a third "splitter magnet" in the LEAR experimental area: Studies of layout and optics / Dumollard, D ; Rensfelt, K G ; Simon, D J
CERN-PS-MU-BL-Note-84-7; PS-MU-BL-Note-84-7.- Geneva : CERN, 1984 - 11 p. Fulltext: PDF;

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2024-03-20
06:33
Curved-Canted-Cosine-Theta (CCCT) Dipole Prototype Development at CERN / Haziot, Ariel (CERN) ; Kirby, Glyn (CERN) ; Dallocchio, Alessandro (CERN) ; Devred, Arnaud (CERN) ; Foussat, Arnaud (CERN) ; Gentini, Luca (CERN) ; Mangiarotti, Franco J (CERN) ; Pentella, Mariano (CERN) ; Petrone, Carlo (CERN) ; Pincot, Francois-Olivier (CERN) et al.
Due to its flexibility in generating advanced field harmonic corrections and potential for low cost compared to traditional designs, the Canted Cosine Theta (CCT) configuration is particularly interesting for compact particle accelerators and gantries for medical applications. This article presents the design of a curved demonstrator named Fusillo, a Canted Cosine Theta Nb-Ti dipole magnet that is being developed at CERN, featuring a large aperture of 236 mm, a small bending radius of 1 m, a bending angle of 90$^{\circ }$, and multi-harmonic field correction, with a 3.61 T conductor peak field. [...]
2024 - 8 p. - Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4002608 Fulltext: PDF;

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2024-03-20
06:33
Study on the Thermal Contraction Behavior of State-of-the-Art Nb$_3$Sn Superconducting Magnet Coils in the Longitudinal, Azimuthal, and Radial Direction / Höll, Stefan (CERN) ; Guinchard, Michael (CERN) ; Izquierdo Bermudez, Susana (CERN) ; Frutos, Óscar Sacristán De (CERN)
To meet the requirements of the HL-LHC upgrade in terms of stronger magnetic fields, the new focusing MQXF quadrupoles make use of the enhanced superconducting properties of  Nb$_3$Sn compared to its predecessor NbTi. However, the change in material leads to an increased brittleness and strain sensitivity of the magnet coils, which raises the importance of an adequate mechanical design to guarantee the performance of the magnet. [...]
2024 - 6 p. - Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4003006

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2024-03-20
06:33
Analytical Evaluation of Dipole Performance Limits for a Muon Collider / Novelli, Daniel (U. Rome La Sapienza (main) ; INFN, Genoa) ; Bersani, Andrea (INFN, Genoa) ; Bottura, Luca (CERN) ; Caiffi, Barbara (INFN, Genoa) ; Fabbri, Siara (CERN) ; Farinon, Stefania (INFN, Genoa) ; Mariotto, Samuele (INFN, Milan ; Milan U. ; LASA, Segrate) ; Musenich, Riccardo (INFN, Genoa) ; Pampaloni, Alessandra (INFN, Genoa) ; Salmi, Tiina (Tampere U. of Tech.) et al.
Following the recommendation of the Updated European Strategy for Particle Physics, an International Muon Collider Collaboration has been formed and is currently studying the feasibility of a 10 TeV center-of-mass energy muon collider facility. Several technical challenges must be faced, mainly due to the limited muon lifetime at rest, 2.2 µs. [...]
2024 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4002405

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2024-03-19
06:18
Vacuum ultraviolet optical properties of GaSb determined by synchrotron rotating analyzer ellipsometry: applications in nanopillars and plasmonics / Hale, Nathan (Norwegian U. Sci. Tech.) ; Bjelland, Victoria M (CERN ; Norwegian U. Sci. Tech.) ; Cobet, Christoph (Linz U.) ; Esser, Norbert (Berlin, Tech. U.) ; Kildemo, Morten (Norwegian U. Sci. Tech.)
The vacuum ultraviolet (VUV) optical properties in the range 4 eV to 15 eV of GaSb have been determined by rotating analyzer ellipsometry (RAE) using synchrotron light. The localized surface plasmon resonances (LSPRs) and surface plasmon polaritons (SPPs) are studied as a means to understand the plasmonic behavior of GaSb. [...]
2023 - 17 p. - Published in : Optical Materials Express 13 (2023) 1440

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2024-03-15
15:39
Local Interaction Region Coupling Correction for the LHC / Soubelet, Felix
In order to further expand our knowledge of the structure of matter and the workings of our universe, scientists are constantly seeking to collide particles at ever-increasing energies and with higher luminosity [...]
CERN-THESIS-2023-357 - 205 p.


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2024-03-14
17:53
FOCUS: fast Monte Carlo approach to coherence of undulator sources / Siano, M (Milan U. ; INFN, Milan) ; Geloni, G (European XFEL, Hamburg) ; Paroli, B (Milan U. ; INFN, Milan) ; Butti, D (CERN) ; Lefèvre, T (CERN) ; Mazzoni, S (CERN) ; Trad, G (CERN) ; Iriso, U (CELLS - ALBA, LLS) ; Nosych, A A (CELLS - ALBA, LLS) ; Torino, L (CELLS - ALBA, LLS) et al.
FOCUS (Fast Monte CarlO approach to Coherence of Undulator Sources) is a new GPU-based simulation code to compute the transverse coherence of undulator radiation from ultra-relativistic electrons. The core structure of the code, which is written in the language C++ accelerated with CUDA, combines an analytical description of the emitted electric fields and massively parallel computations on GPUs. [...]
2023 - 10 p. - Published in : J. Synchrotron Radiat. 30 (2023) 217-226 Fulltext: PDF;

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2024-03-14
17:53
Assembly and Test Results of the RMM1a,b Magnet, a CERN Technology Demonstrator Towards Nb3Sn Ultimate Performance / Gautheron, Emma (CERN) ; Bordini, Bernardo (CERN) ; Campagna, Guillaume (CERN) ; Felice, Hélène (CERN) ; Fleiter, Jerome (CERN) ; Guinchard, Michael (CERN) ; Izquierdo Bermudez, Susana (CERN) ; Mugnier, Sylvain (CERN) ; Perez, Juan Carlos (CERN) ; Petrone, Carlo (CERN) et al.
As part of the High Field Magnet technology development carried out at CERN, demonstrators are under construction to explore the full potential of Nb 3 Sn. The Racetrack Model Magnet (RMM) is one of them, building upon the successful Enhanced Racetrack Model Coil (eRMC) eRMC1a magnet which reached 16.5 T peak field or 16.3 T bore field at 1.9 K. [...]
2023 - 8 p. - Published in : IEEE Trans. Appl. Supercond. 33 (2023) 1-8

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