CERN Accelerating science

All CERN Accelerators documents

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2021-03-08
17:15
LHC 3324: Counteracting coupling decay at injection, / Persson, Tobias Hakan Bjorn (CERN) ; Maclean, Ewen Hamish (CERN) ; Hulpers, Fredrik ; Solfaroli Camillocci, Matteo (CERN) ; Hofer, Michael (CERN) ; Tomas Garcia, Rogelio (CERN) ; Garcia-Tabares Valdivieso, Ana (Universidad Complutense (ES))
The b3 spool-pieces are corrector sextupole magnets (MCS), are designed to correct the b3-error of the main dipoles. [...]
CERN-ACC-NOTE-2021-0008.
- 2021. - 22 p.

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2021-03-08
07:14
Search for dark matter produced in association with a $Z$ boson in the ATLAS detector at the Large Hadron Collider / McLean, Kayla (University of Victoria)
This dissertation presents a search for dark matter particles produced in association with a $Z$ boson in proton-proton collisions. The dataset consists of 139 fb$^{-1}$ of collision events with centre-of-mass energy of 13 TeV, and was collected by the ATLAS detector from 2015-2018 at the Large Hadron Collider. [...]
CERN-THESIS-2021-012.- Fulltext: PDF; External link: Approve this document (restricted)

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2021-03-06
06:02
A fiber optic sensors monitoring system for the central beam pipe of the CMS experiment / Fienga, Francesco (CERN ; U. Naples (main) ; INFN, Naples) ; Szillasi, Zoltan (Debrecen, Inst. Nucl. Res.) ; Beni, Noemi (CERN) ; Irace, Andrea (Naples U.) ; Gaddi, Andrea (CERN) ; Zeuner, Wolfram (CERN) ; Ball, Austin (CERN) ; Buontempo, Salvatore (CERN ; INFN, Naples) ; Breglio, Giovanni (CERN ; U. Naples (main) ; INFN, Naples)
In this paper we describe the main characteristics and experimental results, recorded in more than four years of data acquisition, of a temperature and strain monitoring system, called i-pipe, based on Fiber Bragg Grating (FBG) sensors arrays applied for the first time to a sector of the Large Hadron Collider (LHC) at the European Organization for Nuclear Research (CERN): the central beam pipe (BP) of the Compact Muon Solenoid (CMS). The monitoring system, consisting of four arrays of 16 FBG sensors each, as better described in the text, is placed on four directives of the LHC section that passes inside the CMS experiment, namely the CMS central BP. [...]
2019 - 6 p. - Published in : Opt. Laser Technol. 120 (2019) 105650

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2021-03-06
06:02
Study of a large size double stack MRPC with strip readout / Baek, Y W (CERN ; Gangneung-Wonju Natl. U.) ; Kim, D W (Gangneung-Wonju Natl. U.) ; Williams, M C S (CERN ; Gangneung-Wonju Natl. U. ; INFN, Bologna)
The Multigap Resistive Plate Chambers (MRPC) have been using in many experiments for the purpose of particle identification by the measurement of time-of-flight, thanks to its excellent timing performance. We present here a new design of a large size MRPC. [...]
2019 - 4 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 928 (2019) 89-92

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2021-03-06
06:02
Low-complexity voltage and current sources for large-scale quench detection of high-temperature superconducting cables / Arpaia, P (CERN ; U. Naples (main)) ; Baccigalupi, C (CERN ; U. Naples (main)) ; Esposito, A (CERN ; Turin Polytechnic ; U. Naples (main))
In this work, the design of precision voltage and current sources for a new quench detection system for theprotection of superconducting power cables is proposed. The key strength of the design resides in its lowcomplexity, which allows to obtain a low-cost and reliable hardware implementation for the new detector. [...]
2019 - 8 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 920 (2019) 73-80

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2021-03-05
14:18
Development of a beam position monitor for co-propagating electron and proton beams / Senes, Eugenio
Novel acceleration technologies promise a large improvement in particle accelerator performance, but pose a number of technical challenges due to the use of several beams and the beam parameters involved [...]
CERN-THESIS-2020-294 - 140 p.

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2021-03-04
12:13
Thermal and Modal Simulations for the CLIC Module / Petry, Alice (Helsinki Institute of Physics (FI))
The accelerating technologies used in CLIC currently have an RF efficiency of about 40 % The RF losses are dissipated as heat into the cavity disks of the super-accelerating structures, which leads to unwanted thermal deformation. [...]
CERN-ACC-2021-0002 ; CLIC-Note-1170.
- 2021. - 18 p.
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2021-03-04
06:40
High-energy collisions of hadrons: what are the dynamical mechanisms? / Van Hove, L (CERN)
A survey is given of the two dominant mechanisms which have been recognized to operate in high-energy collisions of hadrons, namely diffraction scattering and reggeized article exchange. The main characteristics of these mechanisms are discussed on the basis of the experimental evidence from two-body processes. [...]
1969 - 15 p. - Published in : , pp. 107-121 Fulltext: PDF;
In : International Symposium on Contemporary Physics v1: Theory of condensed matter and related problems, plasma physics, turbulence quantum optics and statistical mechanics, astrophysics quasars and pulsars, gravitational theory and cosmology, Trieste, Italy, 7 - 28 Jun 1968, pp.107-121

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2021-03-03
09:00
Simulation for mitigating dilution kicker high voltage flashover incidents / Loebner, Alina Melaschenko (Aarhus University (DK))
The bachelor’s thesis covers the development of the project “Simulation for mitigating dilution kicker high voltage flashover incidents” made at CERN. [...]
CERN-ACC-NOTE-2021-0007.
- 2021. - 52 p.
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2021-03-03
07:53
Particles of the Universe: an ATLAS Experiment Colouring Book in Finnish | Maailmankaikkeuden hiukkaset: ATLAS-kokeen värityskirja / Anthony, Katarina (Universita degli Studi di Udine (IT)) ; Velho, Mariana (Universidade Nova de Lisboa (PT))
Language: Finnish - The ATLAS Colouring Book (Ages 4+): Explore the world of particles in this free-to-download colouring book! Meet the elementary particles that scientists have discovered – so far! – and learn about the role they play in our Universe..
ATLAS-OUTREACH-2021-012.
- 2021. - 18.
Language: Finnish

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