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CERN Accelerating science

LHC

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2018-08-10
09:55
Studies on potential use and needs of a wideband feedback system for the HL-LHC / Li, Kevin Shing Bruce (CERN) ; Arduini, Gianluigi (CERN) ; Hofle, Wolfgang (CERN) ; Iadarola, Giovanni (CERN) ; Komppula, Jani Paavo Olavi (CERN) ; Metral, Elias (CERN) ; Tomas Garcia, Rogelio (CERN)
Transverse feedback systems are one of the crucial and fundamental devices needed in high brightness proton synchrotrons to ensure a reliable and stable operation. [...]
CERN-ACC-NOTE-2018-0058.
- 2018. - 16 p.

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2018-08-09
12:13
The impact of the use of alternative RF frequencies on the TMCI thresholds for HL-LHC / Li, Kevin Shing Bruce (CERN) ; Arduini, Gianluigi (CERN) ; Iadarola, Giovanni (CERN) ; Metral, Elias (CERN) ; Rumolo, Giovanni (CERN) ; Tomas Garcia, Rogelio (CERN)
Alternative scenarios for using different configurations of RF frequencies exist and are under study for the HL-LHC. [...]
CERN-ACC-NOTE-2018-0057.
- 2018. - 9 p.

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2018-08-02
10:32
Modelling and Analysis of the Electrical and Thermal Transients following the Quench of a Superconducting Electromagnetic Coil within the Large Hadron Collider’s Inner Triplet System / Rowan, Scott
Operators of complex machinery must always think ahead to consider possible future operational threats to, or limitations of, the system [...]
CERN-THESIS-2012-492 - 107 p.

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2018-07-24
15:55
MD 2563: Optics measurement and corrections with half integer tune / Wegscheider, Andreas (Hamburg University (DE)) ; Coello De Portugal - Martinez Vazquez, Jaime Maria (Universitat Politecnica Catalunya (ES)) ; Dilly, Joschua Werner (Ministere des affaires etrangeres et europeennes (FR)) ; Fartoukh, Stephane (CERN) ; Fol, Elena (Johann-Wolfgang-Goethe Univ. (DE)) ; Garcia-Tabares Valdivieso, Ana (Universidad Complutense (ES)) ; Maclean, Ewen Hamish (University of Malta (MT)) ; Papaphilippou, Yannis (CERN) ; Pellegrini, Dario (CERN) ; Persson, Tobias Hakan Bjorn (CERN) et al.
This note reports on the optics measurement and correction actions that were performed during the study of the LHC at a working point close to the half integer resonance..
CERN-ACC-NOTE-2018-0055.
- 2018. - 11 p.

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2018-07-24
10:28
Report from LHC MD 2171: Dynamic aperture at 6.5 TeV / Maclean, Ewen Hamish (University of Malta (MT)) ; Carlier, Felix Simon (Technische Universiteit Delft (NL)) ; Giovannozzi, Massimo (CERN) ; Tomas Garcia, Rogelio (CERN)
Throughout the LHC’s first and second operational runs, increasing emphasis has been placed on the study of nonlinear single-particle beam dynamics [...]
CERN-ACC-NOTE-2018-0054.
- 2018. - 25 p.

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2018-07-23
16:35
Crystal Collimation During the LHC Energy Ramp / Rossi, Roberto (Sapienza Universita e INFN, Roma I (IT)) ; Aberle, Oliver (CERN) ; Andreassen, Odd Oyvind (CERN) ; Butcher, Mark (CERN) ; Dionisio Barreto, Cristovao Andre (CERN) ; Masi, Alessandro (CERN) ; Mirarchi, Daniele (University of Manchester (GB)) ; Montesano, Simone (CERN) ; Lamas Garcia, Inigo (CERN) ; Redaelli, Stefano (CERN) et al.
During this MD, performed on October the 30th, 2016, bent silicon crystals and their goniometers were tested with proton beams for a possible usage of crystal-assisted collimation during the LHC energy ramp. [...]
CERN-ACC-NOTE-2018-0053.
- 2016. - 7 p.
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2018-07-23
16:30
Optics measurements and corrections at β∗= 2.5 km / Garcia-Tabares Valdivieso, Ana (Universidad Complutense (ES)) ; Burkhardt, Helmut (CERN) ; Carlier, Felix Simon (Technische Universiteit Delft (NL)) ; Coello De Portugal - Martinez Vazquez, Jaime Maria (Universitat Politecnica Catalunya (ES)) ; Fol, Elena (Johann-Wolfgang-Goethe Univ. (DE)) ; Maclean, Ewen Hamish (University of Malta (MT)) ; Malina, Lukas (CERN) ; Tomas Garcia, Rogelio (CERN) ; Wegscheider, Andreas (Hamburg University (DE))
This paper reports on the results of the high β∗ (2.5 km) optics measurements and corrections for the LHC at 6.5 TeV in 2016..
CERN-ACC-NOTE-2018-0052.
- 2018. - 18 p.
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2018-07-23
11:15
The economic impact of technological procurement for large-scale research infrastructures: Evidence from the Large Hadron Collider at CERN / Florio, Massimo (Università degli Studi e INFN Milano (IT)) ; Castelnovo, Paolo (Università degli Studi e INFN Milano (IT)) ; Forte, Stefano (Università degli Studi e INFN Milano (IT)) ; Rossi, Lucio (CERN) ; Sirtori, Emanuela (CSIL Centre for Industrial Studies)
The Large Hadron Collider at CERN, the European Organisation for Nuclear Research, is the world’s highest-energy particle accelerator. [...]
CERN-ACC-2018-0022.
- 2018. - 42 p.
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2018-07-16
20:11
Online Transverse Beam Instability Detection in the LHC. High Throughput Real-Time Parallel Data Analysis / Soderen, Martin
This thesis presents the ADT transverse instability detection system, the next generation of instability detection in the LHC at CERN, Geneva [...]
CERN-THESIS-2017-401 LIU-IDA/LITH-EX-A--17/053--SE. - 125 p.

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2018-07-05
14:26
Study of the Damage Mechanisms and Limits of Superconducting Magnet Components due to Beam Impact / Raginel, Vivien
The energy stored in the particle beams of an accelerator such as CERNs Large Hadron Collider (LHC) is substantial and requires a complex machine protection system to protect the equipment from damage [...]
CERN-THESIS-2018-090 - 174 p.

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