CERN Accelerating science

ATS Reports

Nyeste elementer:
2018-02-15
14:39
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). [...]
CERN-ACC-2018-0007.
- 2018. - 8 p.
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2018-01-29
09:36
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, 2017 - 5 p. Fulltext: PDF;
In : Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, Ca, United States Of America, 29 Oct - 1 Nov 2017, pp.Asilomar

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2018-01-25
13:18
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 [...]
CERN-ACC-2018-0003.
- 2018. - 26 p.
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2018-01-22
14:44
What can go wrong in stochastic cooling systems / Caspers, Fritz (ESI, Archamps ; CERN)
This paper discusses very practical aspects of stochastic cooling systems both during construction, running-in, operation and trouble shooting. Due to the high electronic gain, high sensitivity and large bandwidth of such systems, precautions have to be taken to avoid all sorts of EMI/EMC related problems as well as crosstalk and self-oscillations. [...]
CERN-ACC-2018-0002.- Geneva : CERN, 2016 - 7 p. Fulltext: PDF;
In : Workshop on Electron Cooling and Stochastic Cooling, Tokyo & Mt.Fuji, Japan, 4 - 10 Oct 2016, pp.90-96

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2018-01-10
17:38
BE Department Annual Report 2016 / Collier, Paul (CERN) ; Arduini, Gianluigi (CERN) ; Billen, Ronny (CERN) ; Hatziangeli, Eugenia (CERN) ; Jensen, Erk (CERN) ; Jones, Rhodri (CERN) ; Lamont, Mike (CERN) ; Mackney, Anna (CERN) ; Sollander, Peter (CERN) ; Steerenberg, Rende (CERN)
The Beams Department hosts the Groups responsible for the beam generation, acceleration, diagnostics, controls and performance optimization for the whole CERN accelerator complex. [...]
CERN-ACC-2018-0001.
- 2017. - 105 p.
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2017-12-21
09:43
Beam dynamics requirements for HL–LHC electrical circuits / Gamba, Davide (CERN) ; Arduini, Gianluigi (CERN) ; Cerqueira Bastos, Miguel (CERN) ; Coello De Portugal - Martinez Vazquez, Jaime Maria (Universitat Politecnica Catalunya (ES)) ; De Maria, Riccardo (CERN) ; Giovannozzi, Massimo (CERN) ; Martino, Michele (CERN) ; Tomas Garcia, Rogelio (CERN)
A certain number of LHC magnets and relative electrical circuits will be replaced for the HL-LHC upgrade. [...]
CERN-ACC-2017-0101.
- 2017. - 47 p.
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2017-11-20
17:20
The International Linear Collider Machine Staging Report 2017 / Evans, Lyn (Imperial College Sci., Tech. & Med. (GB)) ; Michizono, Shinichiro
The Technical Design Report (TDR) of the ILC mainly concentrates on a baseline machine of 500 GeV centre-of-mass with detailed cost and manpower estimates consistent with this option. [...]
KEK-2017-3 ; DESY-17-180 ; CERN-ACC-2017-0097 ; arXiv:1711.00568.
- 2017. - 23 p.
Full text - Preprint

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2017-10-31
10:45
Study of Power Converter Topologies with Energy Recovery and grid power flow control Part C: a review of alternative structures / Papastergiou, Konstantinos (CERN) ; Le Godec, Gilles (CERN) ; Maestri, Sebastian (Laboratorio de Instrumentaci_on y Control (LIC)- Instituto de Investigaciones Cientificas y Tecnologicas en Electronica (ICYTE)-Universidad Nacional de Mar del Plata, Argentina) ; Retegui, Rogelio Garcia (Laboratorio de Instrumentaci_on y Control (LIC)- Instituto de Investigaciones Cientificas y Tecnologicas en Electronica (ICYTE)-Universidad Nacional de Mar del Plata, Argentina) ; Uicich, Gustavo (Laboratorio de Instrumentaci_on y Control (LIC)- Instituto de Investigaciones Cientificas y Tecnologicas en Electronica (ICYTE)-Universidad Nacional de Mar del Plata, Argentina) ; Benedetti, Mario (Laboratorio de Instrumentaci_on y Control (LIC)- Instituto de Investigaciones Cientificas y Tecnologicas en Electronica (ICYTE)-Universidad Nacional de Mar del Plata, Argentina) ; Carrica, Daniel (Laboratorio de Instrumentaci_on y Control (LIC)- Instituto de Investigaciones Cientificas y Tecnologicas en Electronica (ICYTE)-Universidad Nacional de Mar del Plata, Argentina)
In the framework of a Transfer line (TT2) Consolidation Programme, a number of studies on Energy cycling have been commissioned. [...]
CERN-ACC-2017-0089.
- 2017. - 43 p.
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2017-10-30
10:03
Optics Measurements and Correction Challenges for the HL-LHC / Carlier, Felix Simon (Technische Universiteit Delft (NL)) ; Coello De Portugal - Martinez Vazquez, Jaime Maria (Universitat Politecnica Catalunya (ES)) ; Fartoukh, Stephane (CERN) ; Fol, Elena (University of Applied Sciences (DE)) ; Gamba, Davide (CERN) ; Garcia-Tabares Valdivieso, Ana (Universidad Complutense (ES)) ; Giovannozzi, Massimo (CERN) ; Hofer, Michael (Vienna University of Technology (AT)) ; Langner, Andy Sven (CERN) ; Maclean, Ewen Hamish (CERN) et al.
Optics control in the HL-LHC will be challenged by a very small β* of 15 cm in the two main experiments [...]
CERN-ACC-2017-0088.
- 2017. - 58 p.
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2017-09-18
09:54
LHC Full Energy Exploitation Study: Operation at 7 TeV / Bruning, Oliver (CERN) ; Garcia Alia, Ruben (CERN) ; Antoniou, Fanouria ; Apollonio, Andrea (CERN) ; Arduini, Gianluigi (CERN) ; Baglin, Vincent (CERN) ; Bartmann, Wolfgang (CERN) ; Bednarek, Mateusz Jakub (CERN) ; Bracco, Chiara (CERN) ; Bregliozzi, Giuseppe (CERN) et al.
This is the first report of a three volume study on the full energy exploitation of the LHC. [...]
CERN-ACC-2017-0086.
- 2017. - 51 p.
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