CERN Accelerating science

ATS Notes

Letzte Einträge:
2018-02-15
15:50
MD1271: Effect of low frequency noise on the evolution of the emittance and halo population / Fitterer, Miriam (Fermi National Accelerator Lab. (US)) ; Stancari, Giulio (Fermi National Accelerator Lab. (US)) ; Valishev, Alexander (Fermi National Accelerator Lab. (US)) ; Bruce, Roderik (CERN) ; Hofle, Wolfgang (CERN) ; Hostettler, Michi (Universitaet Bern (CH)) ; Papadopoulou, Parthena Stefania (CERN) ; Papotti, Giulia (CERN) ; Papaphilippou, Yannis (CERN) ; Pellegrini, Dario (CERN) et al.
For the High Luminosity upgrade the β* in IR1 and IR5 will be further reduced compared to the current LHC [...]
CERN-ACC-NOTE-2018-0006.
- 2018. - 40 p.
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2018-02-14
16:42
Impact of the ADT on the beam quality with high brightness beams in collision (MD2155) / Buffat, Xavier (CERN) ; Furuseth, Sondre (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Kostoglou, Sofia (National Technical Univ. of Athens (GR)) ; Salvachua Ferrando, Belen Maria (CERN) ; Papadopoulou, Parthena Stefania (CERN) ; Ponce, Laurette (CERN) ; Solfaroli Camillocci, Matteo (CERN) ; Suykerbuyk, Ronaldus (CERN) ; Valuch, Daniel (CERN) ; Walsh, David John (CERN) et al.
The results of an experiment aiming at determining indirectly the noise level in the LHC, isolating the contribution of the transverse damper, through their impact on the emittance of colliding high brightness bunches at 6.5 TeV in the LHC are presented..
CERN-ACC-NOTE-2018-0005.
- 2018. - 12 p.
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2018-02-09
10:38
Crystal Collimation with Lead Ion Beams at Injection Energy in the LHC / Rossi, Roberto (Sapienza Universita e INFN, Roma I (IT)) ; Aberle, Oliver (CERN) ; Andreassen, Arvid (University of Oslo (NO)) ; Butcher, Mark (CERN) ; Dionisio Barreto, Cristovao Andre (CERN) ; Masi, Alessandro (CERN) ; Mirarchi, Daniele (CERN) ; Montesano, Simone (CERN) ; Lamas Garcia, Inigo (CERN) ; Redaelli, Stefano (CERN) et al.
During this MD, performed on December 2nd 2015, bent silicon crystals were tested with ion beams for a possible usage of crystal-assisted collimation. [...]
CERN-ACC-NOTE-2018-0004.
- 2015. - 8 p.
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2018-01-31
11:43
MD2190: Q" Stabilization during injection / Schenk, Michael (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Fartoukh, Stephane (CERN) ; Li, Kevin Shing Bruce (CERN) ; Malina, Lukas (University of Oslo (NO)) ; Metral, Elias (CERN) ; Tomas Garcia, Rogelio (CERN)
This MD is a follow-up study of MD1831, where single bunches were stabilized against impedance-driven instabilities at 6.5 TeV in the LHC with Q''. [...]
CERN-ACC-NOTE-2018-0003.
- 2018. - 11 p.
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2018-01-19
14:12
Update of the HL-LHC operational scenarios for proton operation / Metral, Elias (CERN) ; Antipov, Sergey (CERN) ; Antoniou, Fanouria (CERN) ; Appleby, Robert Barrie (University of Manchester (GB)) ; Arduini, Gianluigi (CERN) ; Barranco Garcia, Javier (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Baudrenghien, Philippe (CERN) ; Biancacci, Nicolo (CERN) ; Bracco, Chiara (CERN) ; Bruce, Roderik (CERN) et al.
The main aim of this document is to have a clearly identified set of beam and machine parameters to be used for numerical simulations and performance assessment [...]
CERN-ACC-NOTE-2018-0002.
- 2018. - 42 p.
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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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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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2017-12-20
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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2017-12-08
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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2017-12-01
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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Hinweis auf:
LHC MD Notes (89)