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2019-06-11
16:46
LHC MDs 3163, 3164, and 3166: Injection oscillations throughout the cycle / Timko, Helga (CERN) ; Argyropoulos, Theodoros (CERN) ; Baudrenghien, Philippe (CERN) ; Calaga, Rama (CERN) ; Karpov, Ivan (CERN) ; Medina Medrano, Luis Eduardo (CERN) ; Peauger, Franck (CERN) ; Chapochnikova, Elena (CERN) ; Turaj, Katarzyna (CERN)
This note summarizes three inter-related machine development sessions that were performed in the LHC in the course of 2018. [...]
CERN-ACC-NOTE-2019-0021. - 2019.
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2019-06-03
14:15
Novel beam-based correction and stabilisation methods for particle accelerators / Malina, Lukas
Precise control of beam optics and beam stability is of critical importance for machine protection and performance of today's high-energy particle accelerators [...]
CERN-THESIS-2018-426 ISSN1501-7710/No.2041. - Oslo, Norway : University of Oslo, 2018-10-24. - 134 p.

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2019-05-29
15:01
Analysis of Short-Circuit Transients in the LHC Main Dipole Circuit and Development of an Automated Analysis Algorithm / Liakopoulou, Akrivi
The Large Hadron Collider (LHC) spreads over a total distance of 26.7 km and comprises 8 sectors [...]
CERN-THESIS-2019-053 - 68 p.

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2019-05-20
09:34
Co-Simulation of Transient Effects in Superconducting Accelerator Magnets / Maciejewski, Michal
Numerical modeling of complex physical systems involving several coupled physical domains, so called multi-domain and multi-physics systems, poses considerable challenges w.r.t [...]
CERN-THESIS-2018-421 - 139 p.

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2019-05-14
06:57
First Experimental Results on Damage Limits of Superconducting Accelerator Magnet Components Due to Instantaneous Beam Impact / Raginel, Vivien (CERN) ; Bonura, Marco (Geneva U.) ; Kleiven, David (Norwegian U. Sci. Tech.) ; Kulesz, Karolina (CERN) ; Mentink, Matthias (CERN) ; Senatore, Carmine (Geneva U.) ; Schmidt, Rudiger (CERN) ; Siemko, Andrzej (CERN) ; Verweij, Arjan (CERN) ; Will, Andreas (CERN) et al.
The energy stored in the particle beams of an accelerator such as CERNs LHC is substantial and requires a complex machine protection system to protect the equipment from damage. Despite efficient beam absorbers, several failure modes can lead to beam impact on superconducting magnets. [...]
2018 - 10 p. - Published in : IEEE Trans. Appl. Supercond. 28 (2018) 8800310
In : 13th European Conference on Applied Superconductivity, ICCG, Geneva, Switzerland, 17 - 21 Sep 2017, pp.8800310

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2019-05-14
06:57
Cryogenic Considerations for Cooling Superconducting Links and Application to the High Luminosity Upgrade of the Large Hadron Collider (LHC) / Berkowitz Zamora, Daniel (CERN) ; Claudet, Serge (CERN) ; Perin, Antonio (CERN)
Powering superconducting (SC) magnets in particle accelerators remotely through SC links allow to install the power supplies, the current leads, and the ancillary equipment away from the limited space, high radiation areas next to the magnets. Accelerator facilities with SC magnets at 4.5 K always need a significant cryogenic infrastructure; integrating the SC links with the cryogenic system requires a variety of considerations besides the thermal performance of the link's cryostat. [...]
2018 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 28 (2018) 4801605
In : 13th European Conference on Applied Superconductivity, ICCG, Geneva, Switzerland, 17 - 21 Sep 2017, pp.4801605

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2019-04-26
13:44
Supplemental figures for measurement of jet radial profiles in Pb$-$Pb collisions at $\sqrt{s_{\rm NN}}$= 2.76 TeV /ALICE Collaboration
This note contains additional figures characterizing the response of jets in a heavy-ion environment measured with the ALICE detector. Via geometrical matching, PYTHIA jets at $\sqrt{s}$ = 2.76 TeV are matched with themselves after embedding into Pb$-$Pb events which were recorded at the same center-of-mass energy in 2011. [...]
ALICE-PUBLIC-2019-002.- Geneva : CERN, 2019 - 3. Fulltext: PDF;

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2019-04-23
14:00
An Overview of PyHEADTAIL / Oeftiger, Adrian (CERN)
The macro-particle tracking code PyHEADTAIL simulates collective beam dynamics [...]
CERN-ACC-NOTE-2019-0013. - 2019. - 12 p.
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2019-04-08
17:53
MD3284: Partially Stripped Ions in the LHC / Schaumann, Michaela (CERN) ; Abramov, Andrey (University of London (GB)) ; Alemany Fernandez, Reyes (CERN) ; Argyropoulos, Theodoros (CERN) ; Bartosik, Hannes (CERN) ; Biancacci, Nicolo (CERN) ; Bohl, Thomas (CERN) ; Bracco, Chiara (CERN) ; Bruce, Roderik (CERN) ; Burger, Stephane (CERN) et al.
On 25 July 2018 partially stripped lead ions with one remaining electron (208Pb81+) were injected, accelerated and stored in the LHC for the first time in the scope of MD3284. [...]
CERN-ACC-NOTE-2019-0012. - 2019.

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2019-04-04
11:29
MD3288: Instability latency with controlled noise / Furuseth, Sondre (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Buffat, Xavier (CERN) ; Metral, Elias (CERN) ; Valuch, Daniel (CERN) ; Salvant, Benoit (CERN) ; Amorim, David (Universite Grenoble-Alpes (FR)) ; Mounet, Nicolas (CERN) ; Soderen, Martin (CERN) ; Antipov, Sergey (CERN) ; Pieloni, Tatiana (EPFL - Ecole Polytechnique Federale Lausanne (CH)) et al.
During this MD, performed on June 14th and July 26th, 2018, the latency of single bunch instabilities was tested with an external controllable noise produced by the ADT kicker. [...]
CERN-ACC-NOTE-2019-0011. - 2019. - 29 p.
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