CERN Accelerating science

All CERN Accelerators documents

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2017-06-23
13:32
Measurement of the boosted WW+WZ production cross section in the semileptonic decay channel with ATLAS / Spettel, Fabian Manuel
This thesis presents the first measurement of the combined WW+WZ production cross section in the boosted regime with one W boson decaying via the electron or muon channel and the remaining W or Z boson decaying to hadrons [...]
CERN-THESIS-2017-072 - 156 p.

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2017-06-22
11:29
Vol. 45 - Final EuCARD-2 Project Report / Vretenar, Maurizio (CERN)
CERN-ACC-2017-0049.- Geneva : CERN, 2017 Fulltext: PDF;

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2017-06-22
10:51
Injection of the Lead Ion Beam for LHC into the PS / Martini, Michel (CERN)
CERN-PS-AE-Note-2001-012.
- 2001. - 11 p.
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2017-06-22
08:23
Fabrication of First 4-m Coils for the LARP MQXFA Quadrupole and Assembly in Mirror Structure / Holik, E F (Fermilab ; Angelo State U.) ; Ambrosio, G (Fermilab) ; Anerella, M (Brookhaven) ; Bossert, R (Fermilab) ; Cavanna, E (CERN) ; Cheng, D (LBNL, Berkeley) ; Dietderich, D R (LBNL, Berkeley) ; Ferracin, P (CERN) ; Ghosh, A K (Brookhaven) ; Izquierdo Bermudez, S (CERN) et al.
The US LHC Accelerator Research Program is constructing prototype interaction region quadrupoles as part of the US in-kind contribution to the Hi-Lumi LHC project. The low-beta MQXFA Q1/Q3 coils have a 4-m length and a 150 mm bore. [...]
FERMILAB-PUB-16-346-TD.- 2017 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 27 (2017) 4003605 Fulltext: PDF; External link: FERMILABPUB
In : Applied Superconductivity Conference, Denver, CO, USA, 4 - 9 Sep 2016, pp.4003605

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2017-06-22
08:23
Statistics of vacuum breakdown in the high-gradient and low-rate regime / Wuensch, Walter (CERN) ; Degiovanni, Alberto (CERN) ; Calatroni, Sergio (CERN) ; Korsbäck, Anders (Helsinki Inst. of Phys.) ; Djurabekova, Flyura (Helsinki Inst. of Phys.) ; Rajamäki, Robin (Aalto U.) ; Giner-Navarro, Jorge (Valencia U., IFIC)
In an increasing number of high-gradient linear accelerator applications, accelerating structures must operate with both high surface electric fields and low breakdown rates. Understanding the statistical properties of breakdown occurrence in such a regime is of practical importance for optimizing accelerator conditioning and operation algorithms, as well as of interest for efforts to understand the physical processes which underlie the breakdown phenomenon. [...]
2017 - 11 p. - Published in : Phys. Rev. Accel. Beams 20 (2017) 011007 Fulltext: PDF;

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2017-06-21
10:10
The Future of Superconducting Technology for Particle Accelerators / Yamamoto, Akira (High Energy Accelerator Research Organization (JP))
Introduction: - Colliders constructed and operated - Future High Energy Colliders under Study - Superconducting Phases and Applications - Possible Choices among SC Materials Superconducting Magnets and the Future - Advances in SC Magnets for Accelerators - Nb3Sn for realizing Higher Field - NbTi to Nb3Sn for realizing High Field (> 10 T) - HL-LHC as a critical milestone for the Future of Acc [...]
CERN-ACC-SLIDES-2017-0008.
- 2015. - 56 p.
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2017-06-21
07:22
Multipole-field measurements by sampling oblong apertures of accelerator magnets / Köster, Oliver (Darmstadt, Tech. Hochsch. ; CERN) ; Russenschuck, Stephan (CERN) ; Boine-Frankenheim, Oliver (Darmstadt, Tech. Hochsch.)
The rotating search coil is a commonly used tool to measure magnetic fields of accelerator magnets. The coil intercepts the magnetic flux at a radius given by the dimensions of the measurement shaft that comprises a set of search coils for the analog bucking of the main signal from the dipole field component. [...]
2017 - 7 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 854 (2017) 149-155 Fulltext: PDF;

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2017-06-20
09:57
Limitations due to strong head-on beam-beam interactions (MD 1434) / Buffat, Xavier (CERN) ; Furuseth, Sondre Vik ; Iadarola, Giovanni (CERN) ; Papadopoulou, Parthena Stefania (University of Crete (GR)) ; Papaphilippou, Yannis (CERN) ; Pellegrini, Dario (CERN) ; Pojer, Mirko (CERN) ; Crockford, Guy (CERN) ; Salvachua Ferrando, Belen Maria (CERN) ; Trad, Georges (CERN) et al.
The results of an experiment aiming at probing the limitations due to strong head on beam-beam interactions are reported. [...]
CERN-ACC-NOTE-2017-0044.
- 2017. - 11 p.
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2017-06-17
07:13
Mechanical Performance of Short Models for MQXF, the Nb3Sn Low-β Quadrupole for the Hi-Lumi LHC / Vallone, Giorgio (CERN) ; Ambrosio, Giorgio (Fermilab) ; Anderssen, Eric (LBL, Berkeley) ; Bourcey, Nicolas (CERN) ; Cheng, Daniel W (LBL, Berkeley) ; Felice, Helene (IRFU, SPhN, Saclay) ; Ferracin, Paolo (CERN) ; Fichera, Claudio (CERN) ; Grosclaude, Philippe (CERN) ; Guinchard, Michael (CERN) et al.
In the framework of the Hi-Lumi LHC Project, CERN and U.S. LARP are jointly developing MQXF, a 150-mm aperture high-field Nb3Sn quadrupole for the upgrade of the inner triplet of the low-beta interaction regions. [...]
2016 - 6 p. - Published in : IEEE Trans. Appl. Supercond. 27 (2017) 4002906

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2017-06-17
07:13
Quench Protection System Optimization for the High Luminosity LHC Nb $_3$Sn Quadrupoles / Ravaioli, E (LBL, Berkeley) ; Ambrosio, G (Fermilab) ; Auchmann, B (CERN) ; Ferracin, P (CERN) ; Maciejewski, M (CERN) ; Rodriguez-Mateos, F (CERN) ; Sabbi, GL (LBL, Berkeley) ; Todesco, E (CERN) ; Verweij, A P (CERN)
The upgrade of the large hadron collider to achieve higher luminosity requires the installation of twenty-four 150 mm aperture, 12 T, $Nb_3Sn$ quadrupole magnets close to the two interaction regions at ATLAS and CMS. The protection of these high-field magnets after a quench is particularly challenging due to the high stored energy density, which calls for a fast, effective, and reliable protection system. [...]
FERMILAB-PUB-16-563-TD.- 2017 - 7 p. - Published in : IEEE Trans. Appl. Supercond. 27 (2017) 4702107

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