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CERN Accelerating science

All CERN Accelerators documents

Ultimi arrivi:
2021-04-22
12:04
A pulsed high-voltage decelerator system to deliver low-energy antiprotons / Husson, A (IJCLab, Orsay) ; Kim, B H (Seoul Natl. U., Dept. Phys. Astron.) ; Welker, A (CERN) ; Charlton, M (Swansea U.) ; Choi, J J (Seoul Natl. U., Dept. Phys. Astron.) ; Chung, M (UNIST, Ulsan) ; Cladé, P (Paris, Lab. Kastler Brossel) ; Comini, P (IRFU, Saclay) ; Crépin, P -P (Paris, Lab. Kastler Brossel) ; Crivelli, P (Zurich, ETH-CSCS/SCSC) et al.
The GBAR (Gravitational Behavior of Antihydrogen at Rest) experiment at CERN requires efficient deceleration of 100 keV antiprotons provided by the new ELENA synchrotron ring to synthesize antihydrogen. This is accomplished using electrostatic deceleration optics and a drift tube that is designed to switch from -99 kV to ground when the antiproton bunch is inside – essentially a charged particle “elevator” – producing a 1 keV pulse. [...]
2021 - 7 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 1002 (2021) 165245

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2021-04-22
12:04
Parametric FEM modeling of multilayer castellated canted cosine theta (CCT) magnets / Ortwein, Rafal (Cracow, INP) ; Kirby, Glyn (CERN)
Canted cosine theta (CCT) magnets have received increased attention in the recent years due to their inherent characteristics of high field quality and low conductor stresses, as each turn is supported by the metallic former. CCT geometry is suitable for complex magnets—such as nested dipoles, which allow full 360° control of the magnetic field direction. [...]
2021 - 30 p. - Published in : Supercond. Sci. Technol. 34 (2021) 055008

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2021-04-22
12:04
Impact of betatron collimation losses in the High-Energy Large Hadron Collider / Varasteh, M (CERN) ; Bruce, R (CERN) ; Cerutti, F (CERN) ; Crouch, M (CERN) ; Zimmermann, F (CERN)
In response to recommendations in the 2013 update of the European Strategy for Particle Physics, a conceptual design effort for an energy upgrade of the Large Hadron Collider (LHC) at CERN, the so-called high-energy LHC (HE-LHC), was launched as part of the Future Circular Collider study. The HE-LHC machine, which is meant to use 16 T magnet technologies in the existing LHC tunnel, would provide proton collisions at a center-of-mass energy of 27 TeV (∼2×LHC) with a total stored energy of 1.34 GJ (∼4×LHC) per beam. [...]
2021 - 12 p. - Published in : Phys. Rev. Accel. Beams 24 (2021) 041601 Fulltext from Publisher: PDF;

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2021-04-22
12:04
Wake-function, impedance, and energy loss determination for two countermoving particle beams / Teofili, L (U. Rome La Sapienza (main) ; INFN, Rome ; CERN) ; Arpaia, P (Naples U. ; CERN) ; Giordano, F (Naples U. ; CERN) ; Lamas, I (CERN) ; Rumolo, G (CERN) ; Salvant, B (CERN) ; Zannini, C (CERN) ; Migliorati, M (U. Rome La Sapienza (main) ; INFN, Rome)
This paper deals with the determination of the wake-function, impedance and energy loss due to surrounding accelerator components of two countermoving beams, i.e., two beams moving in opposite directions. Differently from the classical case, the distance between source and test charges cannot be considered constant. [...]
2021 - 19 p. - Published in : Phys. Rev. Accel. Beams 24 (2021) 041001 Fulltext from Publisher: PDF;

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2021-04-22
12:04
Supervised learning-based reconstruction of magnet errors in circular accelerators / Fol, E (CERN ; Frankfurt U.) ; Tomás, R (Frankfurt U.) ; Franchetti, G (Frankfurt U. ; Darmstadt, GSI)
Magnetic field errors and misalignments cause optics perturbations, which can lead to machine safety issues and performance degradation. The correlation between magnetic errors and deviations of the measured optics functions from design can be used in order to build supervised learning models able to predict magnetic errors directly from a selection of measured optics observables. [...]
2021 - 19 p. - Published in : Eur. Phys. J. Plus 136 (2021) 365 Fulltext: PDF;

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2021-04-22
12:04
On the mechanisms governing the critical current reduction in Nb$_{3}$Sn Rutherford cables under transverse stress / De Marzi, Gianluca (ENEA, Frascati ; CERN) ; Bordini, Bernardo (CERN) ; Baffari, Dario (CERN)
Within the framework of the HiLumi-LHC project, CERN is currently manufacturing 11 T dipole and quadrupole accelerator magnets using state-of-the-art Nb$_{3}$Sn Rutherford cables. Even higher magnetic fields are considered by the Hadron Future Circular Collider (FCC-hh) design study, which plans to develop 16 T Nb$_{3}$Sn bending dipoles. [...]
2021 - 15 p. - Published in : Sci. Rep. 11 (2021) 7369 Fulltext: PDF;

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2021-04-22
12:04
High-gradient behavior of a dipole-mode rf structure / Woolley, B (Lancaster U. ; CERN) ; Burt, G (Lancaster U.) ; Dexter, A C (Lancaster U.) ; Peacock, R (Lancaster U.) ; Millar, W L (Lancaster U.) ; Catalan Lasheras, N (CERN) ; Degiovanni, A (CERN) ; Grudiev, A (CERN) ; Mcmonagle, G (CERN) ; Syratchev, I (CERN) et al.
A normal-conducting, X-band traveling wave structure operating in the dipole mode has been systematically high-gradient tested to gain insight into the maximum possible gradients in these types of structure. Measured structure conditioning, breakdown behavior, and achieved surface fields are reported as well as a postmortem analysis of the breakdown position and a scanning electron microscope analysis of the high-field surfaces. [...]
2020 - 11 p. - Published in : Phys. Rev. Accel. Beams 23 (2020) 122002 Fulltext: PDF;

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2021-04-21
15:02
Category Accelerators and storage rings - CERN-OBJ-AC-074.
Large Hadron Collider (LHC) Dipole Magnet Cutaway


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2021-04-21
06:17
Technological Inventions at CERN / Taylor, Thomas (CERN)
The recent achievements of the experiments at CERN are in part due to the extraordinary development of the Organization over the more than 60 years of its existence. [...]
2019. - 15 p.

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2021-04-19
15:14
Particles of the Universe: an ATLAS Experiment Colouring Book in French | Les particules de l'Univers : un livre de coloriage de l'expérience ATLAS / Anthony, Katarina (Universita degli Studi di Udine (IT)) ; Velho, Mariana (Universidade Nova de Lisboa (PT))
Language: French - The ATLAS Colouring Book (Ages 4+): Explore the world of particles in this free-to-download colouring book! Meet the elementary particles that scientists have discovered – so far! – and learn about the role they play in our Universe..
ATLAS-OUTREACH-2021-030.
- 2021. - 18.
Language: Arabic

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