CERN Accelerating science

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2021-09-23
10:46
Chromaticity Measurement based on Beam Transfer Function: Non-Linear Fits and Deep Learning / Vicentini, Giulio
At the Large Hadron Collider (LHC), the stability of the beams is one of the most important characteristic that has to be ensured in order to not compromise the accelerator performances. [...]
CERN-STUDENTS-Note-2021-171.
- 2021.
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2021-09-22
11:22
Optimising and Extending A Single-Particle Tracking Library For High Parallel Performance / Schwinzerl, Martin (University of Graz (AT)) ; De Maria, Riccardo (CERN) ; Paraschou, Konstantinos (Aristotle University of Thessaloniki (GR)) ; Bartosik, Hannes (CERN) ; Iadarola, Giovanni (CERN) ; Oeftiger, Adrian (GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
SixTrackLib is a library for performing tracking simulations on highly parallel systems such as shared memory multi-core processors or graphical processing units (GPUs). [...]
CERN-ACC-NOTE-2021-0023.
- 2021. - 7 p.
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2021-09-20
08:47
Conceptual design of an off-momentum collimation system in the CERN Super Proton Synchrotron for High-Luminosity Large Hadron Collider proton beams / Patecki, Marcin (CERN) ; Mereghetti, Alessio (CERN) ; Mirarchi, Daniele (CERN) ; Redaelli, Stefano (CERN)
The CERN accelerator complex is undergoing an upgrade in order to meet the requirements of the High-Luminosity Large Hadron Collider (HL-LHC). One of the key needs is to increase the intensity of beams injected into the LHC from the current $1.15 \times 10^{11}$ to $2.3 \times 10^{11}$ $p^+ $ /bunch. [...]
2021 - 14 p. - Published in : Phys. Rev. Accel. Beams 24 (2021) 093002 Fulltext: PDF;

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2021-09-08
07:22
Characterization of the slow extraction frequency response / Pari, M (CERN) ; Velotti, F M (CERN) ; Fraser, M A (CERN) ; Kain, V (CERN) ; Michels, O (CERN)
The main physics program of the CERN Super Proton Synchrotron (SPS) is dedicated to the fixed target physics experiments hosted in the North experimental Area (NA). Protons are delivered to the NA via third-integer resonant slow extraction over an almost 5 s flattop. [...]
2021 - 16 p. - Published in : Phys. Rev. Accel. Beams 24 (2021) 083501 Fulltext: PDF;

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2021-08-31
06:02
CERN Secondary Beamlines Software Migration Project / Gerbershagen, Alexander (CERN) ; Banerjee, Dipanwita (CERN) ; Bernhard, Johannes (CERN) ; Brugger, Markus (CERN) ; Charitonidis, Nikolaos (CERN) ; D'Alessandro, Gian Luigi (CERN ; Royal Holloway, U. of London) ; Gatignon, Laurent (CERN) ; Montbarbon, Eva (CERN) ; Peres, Inbal (CERN ; Technion) ; Rae, Bastien (CERN) et al.
The Experimental Areas group of the CERN Engineering department operates a number of beamlines for the fixed target experiments, irradiation facilities and test beams. The software currently used for the simulation of the beamline layout (BEATCH), beam optics (TRANSPORT), particle tracking (TURTLE) and muon halo calculation (HALO) has been developed in FORTRAN in the 1980s and requires an update in order to ensure long-term continuity. [...]
2019 - 6 p. - Published in : 10.18429/JACoW-ICALEPCS2019-MOPHA047 Fulltext: PDF;
In : 17th Biennial International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS), New York, United States, 5 - 11 Oct 2019, pp.MOPHA047

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2021-08-29
14:47
The PLC Control System for the RF Upgrade of the Super Proton Synchrotron / Oliveira, Joao Carlos (CERN) ; Arnaudon, Luca (CERN) ; Diaz Fontalva, Alejandro (CERN)
During the CERN Long Shutdown 2 (LS2), the 200 MHz main acceleration system of the Super Proton Synchrotron (SPS) is being upgraded. Two cavities will be added to reach a total of six. [...]
2019 - 4 p. - Published in : 10.18429/JACoW-ICALEPCS2019-MOPHA103 Fulltext: PDF;
In : 17th Biennial International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS), New York, United States, 5 - 11 Oct 2019, pp.MOPHA103

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2021-08-27
07:40
A compact RFQ cooler buncher for CRIS experiments / Cooper, B S (Manchester U.) ; A Perrett, H (Manchester U.) ; Ricketts, C M (Manchester U.) ; Read, C (Manchester U.) ; Edwards, G (Manchester U.) ; Flanagan, K T (Manchester U.) ; Billowes, J (Manchester U.) ; Binnersley, C L (Manchester U.) ; Bissell, M L (Manchester U.) ; Cocolios, T E (Leuven U.) et al.
A compact radio frequency cooler buncher (RFQCB) is currently in development between The University of Manchester, KU Leuven and CERN. The device will be installed as part of the Collinear Resonance Ionisation Spectroscopy (CRIS) experiment at the Isotope separator On-line device (ISOLDE) at CERN. [...]
2019 - 8 p. - Published in : Hyperfine Interact. 240 (2019) 52 Fulltext from Publisher: PDF;
In : 7th International Conference on Trapped Charged Particles and Fundamental Physics, Takamatsu, Japan, 30 Sep - 5 Oct 2018, pp.52

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2021-08-27
04:56
Injection and Extraction / Tecker, Frank (CERN)
This paper gives an overview of the beam injection and extraction principles for accelerators. [...]
arXiv:2108.11160.
- 14 p.

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2021-08-21
10:18
The Pion Single-Event Latch-Up Cross Section Enhancement: Mechanisms and Consequences for Accelerator Hardness Assurance / Coronetti, Andrea (CERN ; Jyvaskyla U.) ; Alia, Ruben Garcia (CERN) ; Cerutti, Francesco (CERN) ; Hajdas, Wojtek (PSI, Villigen) ; Soderstrom, Daniel (Jyvaskyla U.) ; Javanainen, Arto (Jyvaskyla U. ; Vanderbilt U. (main)) ; Saigne, Frederic (Montpellier U.)
Pions make up a large part of the hadronic environment typical of accelerator mixed fields. Characterizing device cross sections against pions is usually disregarded in favor of tests with protons, whose single-event latch-up (SEL) cross section is, nonetheless, experimentally found to be lower than that of pions for all energies below 250 MeV. [...]
2021 - 10 p. - Published in : IEEE Trans. Nucl. Sci. 68 (2021) 1613-1622 Fulltext: PDF;

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2021-08-19
06:36
CLIC pre-alignment — status and remaining challenges / Kemppinen, Juha (CERN) ; Rude, Vivien (CERN) ; Mainaud Durand, H élène (CERN) ; Mattila, Jouni (Tampere U. of Tech.)
The Compact Linear Collider (CLIC) is a study of a 3 TeV linear electron–positron ($e^+e^-$) accelerator and is a successor candidate for CERN’s Large Hadron Collider. The CLIC luminosity target is $5.9 × 10^{34}$ cm$^{−2}$ s$^{−1}$, which causes unprecedented pre-alignment requirements of its main linear accelerator (main linac). [...]
2021 - 13 p. - Published in : Meas. Sci. Technol. 32 (2021) 115015 Fulltext: PDF;

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