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LHC Performance Notes

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Electron cloud studies for the LHC TDI and HL-LHC TDIS / Skripka, Galina (CERN) ; Iadarola, Giovanni (CERN)
The LHC injection beam stopper (TDI) is designed to protect the machine in case of injection kicker malfunctioning. [...]
- 2018.
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Crab Cavity effects on transverse distribution evolution and tail cleaning in the HL-LHC / Baudrenghien, Philippe (CERN) ; Mastoridis, Themistoklis (California Polytechnic State Univ. (US)) ; Steeper, S (California Polytechnic State Univ. (US)) ; Tucker, D (California Polytechnic State Univ. (US)) ; Wieker, Devin (California Polytechnic State Univ. (US))
This work presents the transverse action and tune distribution evolution as a function of the Crab Cavity RF noise Power Spectral Density (PSD). [...]
- 2018. - 10 p.
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Effect of the total RF voltage on heavy ions at injection energy in the LHC / Schaumann, Michaela (CERN) ; Alemany Fernandez, Reyes (CERN) ; Jebramcik, Marc Andre (Johann-Wolfgang-Goethe Univ. (DE)) ; Jowett, John (CERN) ; Mertens, Tom (CERN)
Emittance growth and particle losses from intra-beam scattering (IBS) are an important source of beam losses, especially at injection energy, for the heavy ions in LHC. [...]
- 2017. - 11 p.
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Summary of the half-day internal review of LHC performance limitations (linked to transverse collective effects) during run II (CERN, 29/11/2016) / Metral, Elias (CERN) ; Arduini, Gianluigi (CERN) ; Biancacci, Nicolo (CERN) ; Buffat, Xavier (CERN) ; Carver, Lee Robert (CERN) ; Iadarola, Giovanni (CERN) ; Li, Kevin Shing Bruce (CERN) ; Persson, Tobias Hakan Bjorn (CERN) ; Romano, Annalisa (Technische Universitaet Darmstadt (DE)) ; Schenk, Michael (Ecole Polytechnique Federale de Lausanne (CH)) et al.
In this note the half-day internal review of LHC performance limitations (linked to transverse collective effects) during run II (2015-2016), which took place at CERN on 29/11/2016 (, is summarised and the next steps are discussed..
- 2017. - 12 p.
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Amplitude dependent closest tune approach / Tomas Garcia, Rogelio (CERN) ; Persson, Tobias Hakan Bjorn (CERN) ; Franchi, Andrea ; Maclean, Ewen Hamish (CERN)
Recent observations in the LHC point to the existence of an amplitude dependent closest tune approach. However this dynamical behavior and its underlying mechanism remain unknown. [...]
CERN-ACC-NOTE-2016-0025.- Geneva : CERN, 2016 - 11 p. - Published in : Phys. Rev. Accel. Beams 19 (2016) 071003 APS Open Access article: PDF; Fulltext: PDF;

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Travel Software using GPU Hardware / Szalwinski, Chris M (Bradly Hoover, School of Information and Communications Technology, Seneca College, Toronto) ; Belli, Eleonora (CERN) ; Dimov, Veliko Atanasov (CERN)
Travel is the main multi-particle tracking code being used at CERN for the beam dynamics calculations through hadron and ion linear accelerators [...]
- 2015. - 14 p.

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Characterization of Embedded BPM Collimators / VALENTINO, Gianluca (CERN)
During LS1, 16 tertiary collimators (TCTs) and 2 secondary collimators (TCSGs) in IR6 were replaced by new embedded BPM collimators. [...]
- 2015. - 0 p.
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Operation and Configuration of the LHC in Run 1 / Alemany-Fernandez, R ; Bravin, E ; Drosdal, L ; Gorzawski, A ; Kain, V ; Lamont, M ; Macpherson, A ; Papotti, G ; Pojer, M ; Ponce, L et al.
Between 2010 and 2013 the LHC was operated with protons at beam energies of 3.5 and 4 TeV. [...]
- 2013.
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Some considerations on the p-p performance of the LHC during Run I / Giovannozzi, M
During the LHC Run I a very large amount of data has been collected, which can be used to improve the understanding of the behaviour of the accelerator. [...]
- 2013. - 11 p.
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A Prototype Readout System for the Diamond Beam Loss Monitors at LHC / Effinger, E (CERN BE/BI) ; Dehning, B (CERN BE/BI) ; Baer, T (CERN BE/OP) ; Schmidt, R (CERN TE/MPE) ; Frais-Kölbl, H (Fachhochschule Wiener Neustadt, Austria) ; Griesmayer, E ((corresponding author)) ; Kavrigin, P (TU Vienna andCIVIDEC Instrumentation*)
Diamond Beam Loss Monitors are used at the LHC for the measurement of fast beam losses. [...]
- 2013. - 17 p.
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