CERN Accelerating science

LHC

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2018-01-15
15:26
β∗ levelling using the LHC Lumi Server (MD 2427) / Hostettler, Michi (Universitaet Bern (CH)) ; Calia, Andrea (Ministere des affaires etrangeres et europeennes (FR)) ; Fuchsberger, Kajetan (CERN) ; Gabriel, Mathieu (CERN) ; Hemelsoet, Georges-Henry (CERN) ; Hruska, Marek (CERN) ; Jacquet, Delphine (CERN) ; Wenninger, Jorg (CERN)
Luminosity levelling by β∗ is the baseline scenario for HL-LHC and will possibly be used in 2018 LHC operation. [...]
CERN-ACC-NOTE-2018-0001.
- 2018. - 10 p.
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2018-01-09
10:40
Head-On Beam-Beam Interactions in High-Energy Hadron Colliders. GPU-Powered Modelling of Nonlinear Effects / Furuseth, Sondre
The performance of high-energy circular hadron colliders, as the Large Hadron Collider, is limited by beam-beam interactions [...]
CERN-THESIS-2017-279 - https://brage.bibsys.no/xmlui/handle/11250/2460617 : NTNU, 2017-08-15. - 119 p.

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2017-12-22
10:53
Analysis of the beam induced heat loads on the LHC arc beam screens during Run 2 / Iadarola, Giovanni (CERN) ; Rumolo, Giovanni (CERN) ; Dijkstal, Philipp (Technische Universitaet Darmstadt (DE)) ; Mether, Lotta (EPFL - Ecole Polytechnique Federale Lausanne (CH))
During Run 2 the Large Hadron Collider (LHC) has been routinely operated with 25 ns bunch spacing [...]
CERN-ACC-NOTE-2017-0066.
- 2017. - 71 p.

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2017-12-22
08:06
Implementation of Space Charge Forces in BimBim / Gottlob, Emmanuel
An numerical algorithm is described for the implementation of linearised coherent space charge forces into BimBim, an eigenvalue solver for the coherent modes of oscillation of multibunch beams in the presence of beam coupling impedance, beam-beam, transverse feedback and now space charge effects [...]
CERN-THESIS-2017-270 - 22 p.

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2017-12-21
09:43
Beam dynamics requirements for HL–LHC electrical circuits / Gamba, Davide (CERN) ; Arduini, Gianluigi (CERN) ; Cerqueira Bastos, Miguel (CERN) ; Coello De Portugal - Martinez Vazquez, Jaime Maria (Universitat Politecnica Catalunya (ES)) ; De Maria, Riccardo (CERN) ; Giovannozzi, Massimo (CERN) ; Martino, Michele (CERN) ; Tomas Garcia, Rogelio (CERN)
A certain number of LHC magnets and relative electrical circuits will be replaced for the HL-LHC upgrade. [...]
CERN-ACC-2017-0101.
- 2017. - 47 p.
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2017-12-20
15:28
Study of off-momentum losses at the start of the ramp in the Large Hadron Collider / Wretborn, Sven Joel (Linkoeping University (SE)) ; Bruce, Roderik (CERN) ; Garcia Morales, Hector (University of London (GB)) ; Sjobaek, Kyrre Ness (University of Oslo (NO))
At the start of the energy ramp at the LHC, any uncaptured beam is quickly lost on the momentum collimators. [...]
CERN-ACC-NOTE-2017-0065.
- 2017. - 37 p.
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2017-12-12
14:53
System Theoretic Dependability Analysis of the LHC Superconducting Magnet Circuit Protection / Hugle, Dennis
Subject of the present work is the application of the methods STPA (System Theoretic Process Analysis) and CAST (Causal Analysis based on STAMP) to analyze the protection systems of the superconducting magnet circuit of the LHC at CERN, Geneva [...]
CERN-THESIS-2017-260 - 81 p.

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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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2017-12-04
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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2017-12-01
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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