CERN Accelerating science

ATS Reports

Beam Impedance / Berrig, Olav Ejner (CERN)
Presentation to IMP (institute of Modern Physics) in Lanzhou, China [...]
- 2018. - 68 p.

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Modelling and implementation of the “6D” beam-beam interaction / Iadarola, Giovanni (CERN) ; De Maria, Riccardo (CERN) ; Papaphilippou, Yannis (CERN)
These slides illustrate the numerical modelling of a beam-beam interaction using the “Synchro Beam Mapping” approach. [...]
- 2018. - 104 p.
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Efficient Evaluation of Arbitrary Static Fields For Symplectic Particle Tracking / Bojtar, Lajos (CERN)
This article describes a method devised for efficient evaluation of arbitrary static magnetic and electric fields in a source free region needed for long time tracking of charged particles. [...]
CERN-ACC-NOTE-2018-0046 ; arXiv:1807.00714 ; CERN-ACC-NOTE-2018-0046.
- 2018. - 9 p.
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About flat telescopic optics for the future operation of the LHC / Fartoukh, Stephane (CERN) ; Karastathis, Nikos (CERN) ; Ponce, Laurette (CERN) ; Solfaroli Camillocci, Matteo (CERN) ; Tomas Garcia, Rogelio (CERN)
This report discusses and motivates the possible deployment of flat collision optics for the future operation of the LHC. [...]
- 2018. - 63 p.

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MD#2183: Calibration of the IR6 B2 diamond BLMs / Valette, Matthieu (CERN) ; Wollmann, Daniel (CERN) ; Lindstrom, Bjorn Hans Filip (Uppsala University (SE))
In case of an asynchronous beam dump with a fully filled LHC machine, causing ~40 bunches to impact on the movable dump protection absorber (TCDQ), it is expected that all standard ionisation chamber Beam Loss Monitors (IC BLM) around the LHC dumping region in IR6 will be saturated. [...]
- 2018. - 6 p.
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Concept of a Machine Protection System for the High-Energy LHC / Raginel, Vivien ; Schmidt, Rudiger (Technische Universitaet Darmstadt (DE)) ; Wollmann, Daniel (CERN)
The High-Energy LHC (HE-LHC) is setting new precedents in stored energy in both, the superconducting magnet system (∼ 20 GJ) and the beams (1.34 GJ) as compared to LHC and the LHC upgrade to increase the luminosity (HL-LHC). [...]
- 2018. - 9 p.
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MD2036: UFO Dynamics Studies and UFO Fast Detection / Belanger, Philippe (Universite de Montreal (CA)) ; Apollonio, Andrea (CERN) ; Valette, Matthieu (CERN) ; Lindstrom, Bjorn Hans Filip (Uppsala University (SE)) ; Grob, Laura Katharina ; Schmidt, Rudiger (Technische Universitaet Darmstadt (DE)) ; Wollmann, Daniel (CERN)
UFOs are one of the remaining unknown related to LHC operation. [...]
- 2017. - 11 p.
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MD#1826: Measurement of Quench Heater vertical kick / Valette, Matthieu (CERN) ; Wollmann, Daniel (CERN) ; Lindstrom, Bjorn Hans Filip (Uppsala University (SE)) ; Bortot, Lorenzo (CERN) ; Fernandez Navarro, Alejandro (CERN) ; Schmidt, Rudiger (Technische Universitaet Darmstadt (DE)) ; Verweij, Arjan (CERN)
Following the observation of vertical orbit oscillations of the LHC beam between the detection of a (beam induced) quench of an LHC main dipole and the beam dump, a study was started to verify that the orbit distortions are caused by the firing of the quench heaters (QH). [...]
- 2018. - 8 p.
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Polar Coding for the Large Hadron Collider: Challenges in Code Concatenation / Balatsoukas Stimming, Alexios (CERN) ; Podzorny, Tomasz (CERN) ; Uythoven, Jan (CERN)
In this work, we present a concatenated repetition-polar coding scheme that is aimed at applications requiring highly unbalanced unequal bit-error protection, such as the Beam Interlock System of the Large Hadron Collider at CERN. Even though this concatenation scheme is simple, it reveals significant challenges that may be encountered when designing a concatenated scheme that uses a polar code as an inner code, such as error correlation and unusual decision log-likelihood ratio distributions. [...]
CERN-ACC-2018-0004.- Geneva : CERN, 2018 - 5 p. Fulltext: PDF;
In : Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, Ca, United States Of America, 29 Oct - 1 Nov 2017

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Effective pile-up density as a measure of the experimental data quality for High-Luminosity LHC operational scenarios. / Medina Medrano, Luis Eduardo (CERN) ; Tomas Garcia, Rogelio (CERN) ; Arduini, Gianluigi (CERN) ; Napsuciale, Mauro (Universidad de Guanajuato)
The High-Luminosity LHC (HL-LHC) experiments will operate at unprecedented level of event pile-up from proton-proton collisions at 14TeV center-of-mass energy [...]
- 2018. - 26 p.
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