CERN Accelerating science

All CERN Accelerators documents

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2019-10-21
11:12
First simulations of collimation cleaning performance for the FCC-hh / Fiascaris, M. (CERN) ; Bruce, R. (CERN) ; Redaelli, S. (CERN)
In the context of the Future Circular Collider Study (FCC), the FCC-hh is designed to collide protons at the unprecedented energy of 50 TeV and a total stored energy of 8500 MJ per beam. This puts extremely tight requirements on the collimation system to efficiently intercept unavoidable beam losses. [...]
2018 - 10 p.
In : ICFA Mini-Workshop on Tracking for Collimation in Particle Accelerators, CERN, Geneva, Switzerland, 30 Oct 2015, pp.171 (CERN-2018-011-CP)

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2019-10-21
10:50
HL-LHC Hollow Electron Lens Integration using MERLIN / Rafique, H. (University of Huddersfield ; CERN) ; Appleby, R.B. (University of Manchester ; Cockcroft Institute, Daresbury) ; Barlow, R.J. (University of Huddersfield) ; Molson, J.G. (Orsay, LAL) ; Tygier, S.C. (University of Manchester ; Cockcroft Institute, Daresbury) ; Valloni, A. (CERN ; Cockroft Institute, Daresbury)
The C++ accelerator physics library MERLIN has been developed for LHC collimation. Recently MERLIN has been upgraded to provide a robust tool for HL-LHC collimation, including the treatment of composite materials, and a hollow electron lens process. [...]
2018 - 27 p.
In : ICFA Mini-Workshop on Tracking for Collimation in Particle Accelerators, CERN, Geneva, Switzerland, 30 Oct 2015, pp.135 (CERN-2018-011-CP)

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2019-10-21
10:44
Dynamic simulations in SixTrack / Sjobak, K. (CERN) ; Berglyd Olsen, V.K. (CERN) ; De Maria, R. (CERN) ; Fitterer, M. (CERN) ; García, A. Santamaría (CERN) ; Garcia-Morales, H. (CERN) ; Mereghetti, A. (CERN) ; Wagner, J.F. (CERN) ; Wretborn, S.J. (CERN)
The DYNK module allows element settings in SixTrack to be changed on a turn-by-turn basis. This document contains a technical description of the DYNK module in SixTrack [...]
2018 - 11 p.
In : ICFA Mini-Workshop on Tracking for Collimation in Particle Accelerators, CERN, Geneva, Switzerland, 30 Oct 2015, pp.123 (CERN-2018-011-CP)

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2019-10-21
10:37
Updated implementation of collimator materials in SixTrack and MERLIN codes / Quaranta, E. (CERN ; Politecnico di Milano) ; Valloni, A. (CERN) ; Bruce, R. (CERN) ; Mereghetti, A. (CERN) ; Redaelli, S. (CERN)
The High-Luminosity upgrade of the Large Hadron Collider will push various operational parameters of the machine beyond the design values. The LHC beam collimation system turns out to be one of the bottlenecks for the achievement of the future challenging beam parameters. [...]
2018 - 10 p.
In : ICFA Mini-Workshop on Tracking for Collimation in Particle Accelerators, CERN, Geneva, Switzerland, 30 Oct 2015, pp.109 (CERN-2018-011-CP)

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2019-10-21
10:33
Crystal implementation in SixTrack for proton beams / Mirarchi, D. (CERN) ; Redaelli, S. (CERN) ; Scandale, W. (CERN)
Crystal channeling is a property of crystals resulting from the extreme order in which the atoms are arranged: the crystalline lattice. Positive charged particles can get trapped between crystalline planes, and bending highly pure crystals allows deflecting high energy beams. [...]
2018 - 18 p.
In : ICFA Mini-Workshop on Tracking for Collimation in Particle Accelerators, CERN, Geneva, Switzerland, 30 Oct 2015, pp.91 (CERN-2018-011-CP)

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2019-10-21
10:06
MARS15-Based System for Beam Loss and Collimation Studies / Mokhov, N.V. (FERMILAB) ; Tropin, I.S. (FERMILAB)
The system includes the newest version of the MARS15 code for particle production and transport in accelerator components integrated with a novel highprecision tracker/stepper for multi-turn tracking merged with MAD-X. The overall approach is described with all the essential features and programming issues highlighted. [...]
2018 - 16 p.
In : ICFA Mini-Workshop on Tracking for Collimation in Particle Accelerators, CERN, Geneva, Switzerland, 30 Oct 2015, pp.57 (CERN-2018-011-CP)

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2019-10-21
09:28
SixTrack Status / De Maria, R. (CERN) ; Mereghetti, A. (CERN) ; Molson, J. (CERN) ; Sjobak, K. (CERN)
SixTrack is a 6D symplectic tracking code used to simulate single-particle dynamics in high-energy circular accelerators and storage rings. It is routinely used for the design and optimization of the LHC since its conception, and more recently for SPS, RHIC, HL-LHC, and FCC studies. [...]
2018 - 5 p.
In : ICFA Mini-Workshop on Tracking for Collimation in Particle Accelerators, CERN, Geneva, Switzerland, 30 Oct 2015, pp.11 (CERN-2018-011-CP)

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2019-10-19
06:02
The ITER In-Vessel Coils – design finalization and challenges / Vostner, Alexander (Euratom, St. Paul Lez Durance) ; Bontemps, Vincent (Euratom, St. Paul Lez Durance) ; Encheva, Anna (Euratom, St. Paul Lez Durance) ; Jin, Huan (Hefei, Inst. Plasma Phys.) ; Laquiere, Julien (Euratom, St. Paul Lez Durance) ; Macioce, Davide (Euratom, St. Paul Lez Durance) ; Mariani, Nicola (Euratom, St. Paul Lez Durance) ; Mcintosh, Simon (Euratom, St. Paul Lez Durance) ; Peng, Xuebing (Euratom, St. Paul Lez Durance) ; Singh, Shuvay (CERN) et al.
ITER In-Vessel Coils (IVCs), resistive magnets to be installed in close proximity to ITER plasma to compensate fast perturbations of the plasma itself, have undergone a comprehensive revision of their requirements and operational loads, leading to design modifications and R&D; activities. An update of the plasma operating scenarios has been done and the maximum currents during transient plasma events have been assessed considering actual operating currents and the surrounding vacuum vessel support structure leading to more representative load cases. [...]
2019 - 6 p. - Published in : Fusion Eng. Des. 146 (2019) 1490-1495

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2019-10-19
06:02
Dynamic pressure in the LHC: Influence of ions induced by ionization of residual gas by both the proton beam and the electron cloud / Bilgen, Suheyla (Orsay, LAL) ; Baglin, Vincent (CERN) ; Bruni, Christelle (Orsay, LAL) ; Mercier, Bruno (Orsay, LAL) ; Sattonnay, Gaël (Orsay, LAL)
For the future HL-LHC or FCC study, the understanding of the beam interactions with the vacuum chamber is fundamental to provide solutions to mitigate the pressure rises induced by electronic, photonic and ionic molecular desorption. The proton beam circulating in the LHC vacuum chamber ionizes the residual gas producing electrons as well as positive ions. [...]
2019 - 4 p. - Published in : 10.18429/JACoW-IPAC2019-TUPMP004 Preprint: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.TUPMP004

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2019-10-19
06:02
Operational results of LHC collimator alignment using machine learning / Azzopardi, Gabriella (Malta U. ; CERN) ; Muscat, Adrian (Malta U.) ; Redaelli, Stefano (CERN) ; Salvachua, Belen (CERN) ; Valentino, Gianluca (Malta U.)
A complex collimation system is installed in the Large Hadron Collider to protect sensitive equipment from unavoidable beam losses. The collimators are positioned close to the beam in the form of a hierarchy, which is guaranteed by precisely aligning each collimator with a precision of a few tens of micrometers. [...]
2019 - 4 p. - Published in : 10.18429/JACoW-IPAC2019-TUZZPLM1 Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.TUZZPLM1

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