CERN Accelerating science

All CERN Accelerators documents

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2017-12-08
11:44
LHC β*-reach MD: aperture measurements at small β* / Fuster Martinez, Nuria (CERN) ; Bruce, Roderik (CERN) ; Redaelli, Stefano (CERN)
During this MD, performed on the 25th of July 2017, we measured the LHC aperture at top energy for β*=30 cm using the Transverse Damper (ADT) blow-up method. [...]
CERN-ACC-NOTE-2017-0064.
- 2017. - 13 p.
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2017-12-07
09:53
Superconducting cable topology / Depond, J ; Leroy, D ; Oberli, L R
CERN-LHC-MMS-Internal-Note-97-09.
- 1997. - 12 p.
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2017-12-07
09:38
Mesures magnétiques des aimants à septum LEAR SM 11 et SM 12 / Boileau, B (CERN)
CERN-PS-BT-Note-82-10.
- 1982. - 15 p.
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2017-12-04
12:41
Vacuum Simulations in High Energy Accelerators and Distribution Properties of Continuous and Discrete Particle Motions / Aichinger, Ida
The underlying thesis on mathematical simulation methods in application and theory is structured into three parts [...]
CERN-THESIS-2017-252 - 159 p.

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2017-12-02
07:04
The technical challenges of the Large Hadron Collider / Collier, P (CERN)
The Large Hadron Collider (LHC) is a 27 km circumference hadron collider, built at CERN to explore the energy frontier of particle physics. Approved in 1994, it was commissioned and began operation for data taking in 2009. [...]
2014 - 14 p. - Published in : Philos. Trans. R. Soc. Lond. A 373 (2014) 20140044 Fulltext: PDF; External link: Fulltext

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2017-12-02
07:03
Effect of double frequency heating on the lead afterglow beam currents of an electron cyclotron resonance ion source / Toivanen, V (GANIL) ; Bellodi, G (CERN) ; Küchler, D (CERN) ; Wenander, F (CERN) ; Tarvainen, O (Jyvaskyla U.)
The effect of double frequency heating on the performance of the CERN GTS-LHC 14.5 GHz ElectronCyclotron Resonance (ECR) ion source in afterglow mode is reported. The source of the secondary microwave frequency was operated both in pulsed and continuous wave (CW) modes within the range of 12–18 GHz. [...]
2017 - 12 p. - Published in : Phys. Rev. Accel. Beams 20 (2017) 103402 Fulltext: PDF;

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2017-12-02
07:03
Coherent Beam-Beam Instability in Collisions with a Large Crossing Angle / Ohmi, K (KEK, Tsukuba) ; Kuroo, N (KEK, Tsukuba ; Tsukuba U. (main)) ; Oide, K (KEK, Tsukuba ; CERN) ; Zhou, D (KEK, Tsukuba ; CERN) ; Zimmermann, F (CERN)
In recent years the “crab-waist collision” scheme [P. Raimondi, Proceedings of 2nd SuperB Workshop, Frascati, 2006.; M. [...]
2017 - 5 p. - Published in : Phys. Rev. Lett. 119 (2017) 134801 Fulltext: PDF;

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2017-12-02
07:03
LHC cryogenics – new experience of run with increased beam energy and intensity / Brodzinski, K (CERN) ; Claudet, S (CERN) ; Delikaris, D (CERN) ; Delprat, L (CERN) ; Ferlin, G (CERN) ; Rogez, E (CERN) ; Tavian, L (CERN)
After the LHC first long shut down (LS1), when necessary consolidation and maintenance activities were performed on different technical systems, the Large Hadron Collider was progressively cooled down from ambient to operation temperatures from May of 2014. Prior to physics run with increased beam energy to 6.5 TeV/beam, increased beam intensity and modified beam injection scheme, several qualifications and tests affecting cryogenic system have been performed to ensure stable run of the accelerator. [...]
2017 - 9 p. - Published in : IOP Conf. Ser. Mater. Sci. Eng. 171 (2017) 012156 Fulltext: PDF;

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2017-12-02
07:03
Design of a 0-50 mbar pressure measurement channel compatible with the LHC tunnel radiation environment / Casas, Juan (CERN) ; Jelen, Dorota (CERN) ; Trikoupis, Nikolaos (CERN)
The monitoring of cryogenic facilities often require the measurement of pressure in the sub 5'000 Pa range that are used for flow metering applications, for saturated superfluid helium, etc. The pressure measurement is based on the minute displacement of a sensing diaphragm often through contactless techniques by using capacitive or inductive methods. [...]
2017 - Published in : IOP Conf. Ser. Mater. Sci. Eng. 171 (2017) 012141 Fulltext: PDF;

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2017-12-01
10:00
LHC Availability 2017: Standard Proton Physics / Todd, Benjamin (CERN) ; Ponce, Laurette (CERN) ; Apollonio, Andrea (CERN) ; Walsh, David John (CERN)
This document summarises the LHC machine availability for the period from restart to the end of standard proton physics in 2017. [...]
CERN-ACC-NOTE-2017-0063.
- 2017. - 20 p.

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