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ATS Notes

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2017-06-20
09:57
Limitations due to strong head-on beam-beam interactions (MD 1434) / Buffat, Xavier (CERN) ; Furuseth, Sondre Vik ; Iadarola, Giovanni (CERN) ; Papadopoulou, Parthena Stefania (University of Crete (GR)) ; Papaphilippou, Yannis (CERN) ; Pellegrini, Dario (CERN) ; Pojer, Mirko (CERN) ; Crockford, Guy (CERN) ; Salvachua Ferrando, Belen Maria (CERN) ; Trad, Georges (CERN) et al.
The results of an experiment aiming at probing the limitations due to strong head on beam-beam interactions are reported. [...]
CERN-ACC-NOTE-2017-0044. - 2017. - 11 p.
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2017-06-13
13:59
FESA class for off-momentum lossmaps and decomposition of beam losses at LHC / Wyszynski, Michal Jakub (Warsaw University of Technology (PL)) ; Jackson, Stephen (CERN) ; Pojer, Mirko (CERN) ; Salvachua Ferrando, Belen Maria (CERN) ; Valentino, Gianluca (University of Malta (MT))
The project consisted of two main parts. [...]
CERN-ACC-NOTE-2017-0043. - 2016. - 24 p.
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2017-05-24
09:29
THERMOPHYSICAL AND MECHANICAL CHARACTERIZATION OF ADVANCED MATERIALS FOR THE LHC COLLIMATION SYSTEM / Bianchi, Laura (Universita & INFN, Pisa (IT))
The aim of the thesis is to describe the methods employed for the thermo-physical and mechanical characterization and to show the results of the campaign conducted over two ceramic matrix composites, CFC FS140® and MG-6403-Fc, which are candidates as jaws materials in the LHC collimation system. [...]
CERN-ACC-NOTE-2017-0038. - 2017. - 133 p.

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2017-05-15
14:08
Effect of a resonant excitation on the evolution of the beam 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) ; Papadopoulou, Parthena Stefania (University of Crete (GR)) ; Papotti, Giulia (CERN) ; Pellegrini, Dario (CERN) ; Redaelli, Stefano (CERN) ; Trad, Georges (CERN) ; Valuch, Daniel (CERN) et al.
Collimation with hollow electron beams or lenses (HEL) is currently one of the most promising concepts for active halo control in HL-LHC. [...]
CERN-ACC-NOTE-2017-0037. - 2017. - 42 p.
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2017-05-10
11:04
Global compensation of long-range beam-beam effects with octupole magnets: dynamic aperture simulations for the HL-LHC case and possible usage in LHC and FCC. / Barranco Garcia, Javier (Ecole Polytechnique Federale de Lausanne (CH)) ; Pieloni, Tatiana (Ecole Polytechnique Federale de Lausanne)
The Large Hadron Collider has shown with various experimental verifications that one of the main limitations to the collider performance and to a possible upgrade can come from the long-range beam-beam effects which will define the operational parameters (intensities and emittances) and machine set-up (crossing angles and the minimum beta function at the interaction points). [...]
CERN-ACC-NOTE-2017-0036. - 2017.
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2017-05-10
11:00
Dynamic Aperture Studies for HL-LHC with beam-beam effects / Pieloni, Tatiana (Paul Scherrer Institut (CH)) ; Banfi, Danilo ; Barranco Garcia, Javier (Ecole Polytechnique Federale de Lausanne (CH))
Various possible operational scenarios are foreseen for the High Luminosity Large Hadron Collider (HL-LHC). [...]
CERN-ACC-NOTE-2017-0035. - 2017.

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2017-05-10
10:16
Calculation of Wakefields for the New Design of the LHCb Vertex Locator / Wanzenberg, Rainer (Deutsches Elektronen-Synchrotron (DE)) ; Zagorodnova, Olga (Deutsches Elektronen-Synchrotron (DE))
The upgrade of the LHCb detector in the LHCb experiment was planned in 2011. [...]
CERN-ACC-NOTE-2017-0034. - 2016. - 19 p.
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2017-05-10
10:03
Calculation of Wakefields and Higher Order Modes for the New Design of the Vacuum Chamber of the ALICE Experiment for the HL-LHC / Wanzenberg, Rainer (Deutsches Elektronen-Synchrotron (DE)) ; Zagorodnova, Olga (Deutsches Elektronen-Synchrotron (DE))
The High Luminosity Large Hadron Collider (HL-LHC) project was started with the goal to extend the discovery potential of the Large Hadron Collider (LHC). [...]
CERN-ACC-NOTE-2017-0033. - 2016. - 37 p.
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2017-04-26
14:11
MD 1691: Active halo control using tune ripple at injection / Garcia Morales, Hector (University of London (GB)) ; Wagner, Joschka (Johann-Wolfgang-Goethe Univ. (DE)) ; Bruce, Roderik (CERN) ; Redaelli, Stefano (CERN) ; Fitterer, Miriam (Fermi National Accelerator Lab. (US)) ; Fiascaris, Maria (CERN) ; Nisbet, David (CERN) ; Thiesen, Hugues (CERN) ; Valentino, Gianluca (University of Malta (MT)) ; Xu, Chen (CERN)
In this MD we performed halo excitation through tune ripple. [...]
CERN-ACC-NOTE-2017-0031. - 2017. - 11 p.
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2017-04-25
14:25
Probing the behaviour of high brightness bunches in collision at 6.5 TeV and the interplay with an external source of noise (MD1433) / Buffat, Xavier (CERN) ; Biancacci, Nicolo (CERN) ; Furuseth, Sondre Vik ; Jacquet, Delphine (CERN) ; Metral, Elias (CERN) ; Pellegrini, Dario (CERN) ; Pojer, Mirko (CERN) ; Trad, Georges (CERN) ; Valuch, Daniel (CERN) ; Barranco Garcia, Javier (Ecole Polytechnique Federale de Lausanne (CH)) et al.
The results of an experiment aiming at colliding high brightness bunches at 6.5 TeV in the LHC and probing the interplay between external noise and head on beam-beam interaction are presented. [...]
CERN-ACC-NOTE-2017-0030. - 2017. - 16 p.
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LHC MD Notes (77)