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ATS Notes

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MD 979: Beta-beating measurements on colliding beams / Goncalves Jorge, Patrik ; Barranco Garcia, Javier (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Pieloni, Tatiana (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Buffat, Xavier (CERN) ; Carlier, Felix Simon (Technische Universiteit Delft (NL)) ; Coello De Portugal - Martinez Vazquez, Jaime Maria (Universitat Politecnica Catalunya (ES)) ; Fol, Elena (University of Applied Sciences (DE)) ; Langner, Andy Sven (CERN) ; Medina Medrano, Luis Eduardo (Universidad de Guanajuato (MX)) ; Olexa, Jakub (CERN) et al.
The HL-LHC high brightness beams will give a large β-beating due to the head-on and long-range interactions since a beam-beam parameter of 0.01 per Interaction Point (IP) is expected. [...]
- 2017. - 13 p.
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FLUKA Monte Carlo Modelling of the CHARM Facility’s Test Area: Update of the Radiation Field Assessment / Infantino, Angelo (CERN)
The present Accelerator Note is a follow-up of the previous report CERN-ACC-NOTE-2016-12345. [...]
- 2017. - 38 p.
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Automatic Angular alignment of LHC Collimators / Azzopardi, Gabriella (University of Malta (MT)) ; Valentino, Gianluca (University of Malta (MT)) ; Salvachua Ferrando, Belen Maria (CERN) ; Mereghetti, Alessio (CERN) ; Bruce, Roderik (CERN) ; Redaelli, Stefano (CERN)
The LHC is equipped with a complex collimation system to protect sensitive equipment from unavoidable beam losses [...]
- 2017. - 10 p.
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Simulation studies on the electron cloud build-up in the elements of the LHC Arcs at 6.5 TeV / Dijkstal, Philipp (Technische Universitaet Darmstadt (DE)) ; Iadarola, Giovanni (CERN) ; Mether, Lotta (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Rumolo, Giovanni (CERN)
The formation of electron clouds in the arcs of the Large Hadron Collider (LHC) has been identified as one of the main limitations for the performance of the machine. [...]
- 2017. - 27 p.
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Electromagnetic fields and Green functions in elliptical vacuum chambers / Persichelli, Serena ; Biancacci, Nicolo (CERN) ; Migliorati, Mauro ; Palumbo, Luigi (Universita di Roma 'La Sapienza', and INFN Sez. Roma1, Rome, Italy) ; Vaccaro, Vittorio (Universita e INFN, Napoli (IT))
In this paper, we discuss the electromagnetic interaction between a point charge travelling inside a waveguide of elliptical cross section, and the waveguide itself. [...]
- 2017. - 22 p.
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Emittance Measurements For Future LHC Beams Using The PS Booster Measurement Line / Abelleira, Jose ; Hanke, Klaus (CERN) ; Mikulec, Bettina (CERN) ; Di Giovanni, Gian Piero (CERN)
The CERN PS Booster measurement line contains three pairs of SEM grids separated by drift space that measures the beam size in both planes. [...]
- 2017. - 8 p.
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A&T Sector Note on the PS transverse feedback / Coly, Marcel (CERN) ; Cotte, Denis Gerard (CERN) ; Blas, Alfred (CERN) ; Sterbini, Guido (CERN)
In a particle accelerator, several contributions can degrade the beam quality and particularly the beam transverse emittance. [...]
- 2017.
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LHC Availability 2017: Technical Stop 1 to Technical Stop 2 / Todd, Benjamin (CERN) ; Ponce, Laurette (CERN) ; Apollonio, Andrea (CERN) ; Walsh, David John (CERN)
This document summarises the LHC machine availability for the period of Technical Stop 1 (TS1) to Technical Stop 2 (TS2) in 2017. [...]
- 2017. - 14 p.
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beta* leveling with telescopic ATS squeeze (MD 2410) / Wenninger, Jorg (CERN) ; Fuchsberger, Kajetan (CERN) ; Hostettler, Michi (Universitaet Bern (CH)) ; Pojer, Mirko (CERN) ; Ponce, Laurette (CERN) ; Tydecks, Tobias (CERN)
Luminosity leveling by beta* is the baseline operational scenario of HL-LHC, and this leveling technique may be used in 2018 or during run~3 depending on the beam parameters and beta* range. [...]
- 2017.
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MD1405: Demonstration of forced dynamic aperture measurements at injection / Carlier, Felix Simon (Technische Universiteit Delft (NL)) ; Maclean, Ewen Hamish (CERN) ; Persson, Tobias Hakan Bjorn (CERN) ; Tomas Garcia, Rogelio (CERN)
Accurate measurements of dynamic aperture become more important for the LHC as it advances into increasingly nonlinear regimes of operations, as well as for the High Luminosity LHC where machine nonlinearities will have a significantly larger impact [...]
- 2017. - 6 p.
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LHC MD Notes (83)