2020-12-16 17:28 |
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2020-12-16 06:02 |
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2020-11-28 06:26 |
Electron flux and pressure dynamic in the LHC vacuum pilot sector as a function of beam parameters and beam pipe properties
/ Buratin, Elena (CERN ; EPFL, Lausanne, FSL) ; Baglin, Vincent (CERN) ; Henrist, Bernard (CERN) ; Chiggiato, Paolo (CERN) ; Fasoli, Ambrogio (EPFL, Lausanne, FSL)
The Large Hadron Collider (LHC) is affected by the electron cloud (EC) phenomenon that can provoke beam instabilities, detrimental heat loads and pressure increases in the vacuum system. An innovative dedicated system called vacuum pilot sector (VPS) provides a continuous monitoring of the electron flux and of the pressure signals thanks to electron pickup and vacuum gauges. [...]
2020 - 10 p.
- Published in : Phys. Rev. Accel. Beams 23 (2020) 114802
Fulltext from Publisher: PDF;
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2020-11-24 12:09 |
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2020-11-24 11:33 |
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Strategy for Landau damping of head-tail instabilities at top energy in the HL-LHC
/ Buffat, Xavier (CERN) ; Antipov, Sergey ; Arduini, Gianluigi (CERN) ; De Maria, Riccardo (CERN) ; Karastathis, Nikos ; Kostoglou, Sofia (CERN) ; Koval, Adam (University of Dundee (GB)) ; Maclean, Ewen Hamish (CERN) ; Mounet, Nicolas (CERN) ; Papaphilippou, Yannis (CERN) et al.
The main aspects linked to Landau damping of head-tail instabilities at top energy in the HL-LHC are discussed, in particular the interplay between the arc octupoles and long-range, offset or head-on beam-beam interactions as well as lattice imperfections. [...]
CERN-ACC-NOTE-2020-0059.
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2020. - 28 p.
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2020-11-17 04:21 |
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2020-11-11 06:42 |
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2020-11-11 06:42 |
Preload Characterization of Short Models of MQXF the Nb$_3$Sn Low-$β$ Quadrupole for the Hi-Lumi LHC
/ Takala, Eelis (CERN) ; Ambrosio, Giorgio (Fermilab) ; Bourcey, Nicolas (CERN) ; Cheng, Daniel W (LBL, Berkeley) ; Ferracin, Paolo (CERN) ; Guinchard, Michael (CERN) ; Izquierdo Bermudez, Susana (CERN) ; Mangiarotti, Franco (CERN) ; Pan, Heng (LBL, Berkeley) ; Perez, Juan Carlos (CERN) et al.
MQXF is the Nb$_3$Sn Low-β Quadrupole magnet that the HL-LHC project is planning to install in the LHC interaction regions in 2026 as part of an upgrade to increase the LHC inte-grated luminosity by about a factor of ten. The magnet will be fab-ricated in two different lengths: 4.2 m for MQXFA, built in the US by the Accelerator Upgrade Project (AUP), and 7.15 m for MQXFB, fabricated by CERN. [...]
FERMILAB-PUB-20-119-TD.-
2020 - 6 p.
- Published in : IEEE Trans. Appl. Supercond. 30 (2020) 4002806
Fulltext: PDF; External link: Fermilab Accepted Manuscript
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2020-11-11 05:03 |
Numerical Analysis of the Screening Current-Induced Magnetic Field in the HTS Insert Dipole Magnet Feather-M2.1-2
/ Bortot, Lorenzo (CERN ; Darmstadt, Tech. U.) ; Mentink, Matthias (CERN) ; Petrone, Carlo (CERN) ; Van Nugteren, Jeroen (CERN) ; Kirby, Glyn (CERN) ; Pentella, Mariano (CERN ; Polytech. Turin) ; Verweij, Arjan (CERN) ; Schöps, Sebastian (Darmstadt, Tech. U.)
Screening currents are field-induced dynamic phenomena which occur in superconducting materials, leading to persistent magnetization. Such currents are of importance in ReBCO tapes, where the large size of the superconducting filaments gives rise to strong magnetization phenomena. [...]
arXiv:2005.09467.-
2020-10-30 - 14 p.
- Published in : Supercond. Sci. Technol. 33 (2020) 125008
Fulltext: PDF; Fulltext from publisher: PDF;
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2020-11-10 11:33 |
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