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2019-04-25
06:31
Eradication of Mercury Ignitron from the 400 kA Magnetic Horn Pulse Generator for CERN Antiproton Decelerator / Namora, Vasco (CERN) ; Calviani, Marco (CERN) ; Ducimetière, Laurent (CERN) ; Faure, Patrick (CERN) ; Fernandez, Luis (CERN) ; Grawer, Gregor (CERN) ; Senaj, Viliam (CERN)
The CERN Antiproton Decelerator (AD) produces low-energy antiprotons for studies of antimatter. A 26 GeV proton beam impacts the AD production target which produces secondary particles including antiprotons. [...]
2018 - 3 p. - Published in : 10.18429/JACoW-IPAC2018-WEPMF086 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPMF086

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2019-04-25
06:31
Comparison of Superconducting Septa Topologies and Parameter Space Exploration / Atanasov, Miroslav (CERN) ; Borburgh, Jan (CERN) ; Hourican, Michael (CERN) ; Sanz Ull, Alejandro (CERN ; Eindhoven, Tech. U.)
The unprecedented energy scale of the FCC poses challenging requirements for its magnetic elements including the septum magnets for injection and extraction. With an ambitious target field of 4 T and an apparent septum thickness of only 25 mm, different superconducting septa topologies have been investigated to explore their limitations. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-WEPMF083 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPMF083

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2019-04-25
06:31
Investigation and Estimation of the LHC Magnet Vibrations Induced by HL-LHC Civil Engineering Activities / Guinchard, Michael (CERN) ; Cabon, Morgane (CERN) ; Charrondière, Cedric (CERN) ; Develle, Kevin (CERN) ; Fessia, Paolo (CERN) ; Lacny, Lukasz (CERN ; Cracow Tech. U.) ; Osborne, John (CERN) ; Scislo, Lukasz (CERN ; Cracow Tech. U.) ; Wenninger, Jorg (CERN)
The HL-LHC project requires major underground civil engineering, with the excavation of large underground structures in order to host new equipment. The tunnels con-struction and other civil engineering works will therefore take place in parallel with the LHC operation. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-WEPMF080 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPMF080

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2019-04-25
06:31
Demonstration of Feasibility of the CLIC Damping Ring Extraction Kicker Modulators / Holma, Janne (CERN) ; Barnes, Michael (CERN) ; Ferrero Colomo, Alvaro (CERN)
The CLIC study is investigating the technical feasibility of an electron-positron collider with high luminosity and a nominal centre-of-mass energy of 3 TeV. Pre-damping rings and damping rings (DRs) will produce ultra-low emittance beam with high bunch charge. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-WEPMF077 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPMF077

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2019-04-25
06:31
First Prototype Inductive Adder for the FCC Injection / Woog, David (CERN) ; Barnes, Michael (CERN) ; Ferrero Colomo, Alvaro (CERN) ; Holma, Janne (CERN) ; Kramer, Thomas (CERN)
A highly reliable kicker system is required as part of theinjection for the FCC. A significant weak point of conven-tional kicker systems is often the pulse generator, wherea Pulse Forming Network/Line (PFN/PFL) is dischargedthrough a thyratron switch to generate the current pulse forthe kicker magnet. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-WEPMF076 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPMF076

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2019-04-25
06:31
Adaptation of the Cryogenic System Capacity for the LHC Dynamic Heat Load - Operational Experience / Brodzinski, Krzysztof (CERN) ; Bradu, Benjamin (CERN) ; Claudet, Serge (CERN) ; Delikaris, Dimitri (CERN) ; Delprat, Laurent (CERN) ; Ferlin, Gerard (CERN)
During second LHC physics operation period (Run2), between 2015 and 2018, the accelerator operation modes and beam parameters have been adapted thus allowing significantly improved integrated luminosity production. Increased energy, intensity and adapted beam operation schemes with 25 ns of inter-bunches spacing have an essential influence on the dynamic heat load generation with direct impact on the cryogenic cooling system. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-WEPMF073 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPMF073

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2019-04-25
06:31
Design, Prototyping Activities and Beam Irradiation Test for the New n_{TOF} Neutron Spallation Target / Esposito, Raffaele (CERN ; Ecole Polytechnique, Lausanne) ; Bergeret, Marc (CERN) ; Busom, Josep (CERN) ; Butcher, Mark (CERN) ; Calviani, Marco (CERN) ; Cimmino, Roberta (CERN) ; Coiffet, Thibaut (CERN) ; Espadanal, Joao (CERN) ; Gentini, Luca (CERN) ; Illan Fiastre, Ricardo (CERN) et al.
A third-generation neutron spallation target for the neutron time-of-flight facility at CERN (n_{TOF}) is currently undergoing the design and prototyping stage. The new design aims at improving reliability, increasing beam intensity on target and avoiding issues encountered in the current generation target, in particular the contamination of the cooling system water with radioactive spallation products coming from washing out lead. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-WEPMF084 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPMF084

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2019-04-25
06:31
Recent results from NA62 / Trilov, Stoyan (Bristol U.) /NA62
$K^+ \rightarrow \pi^+ \nu \bar{\nu}$ is one of the theoretically cleanest meson decay where to look for indirect effects of new physics complementary to LHC searches. The NA62 experiment at CERN SPS is designed to measure the branching ratio of the $K^+ \rightarrow \pi^+ \nu \bar{\nu}$ decay with 10% precision. [...]
SISSA, 2018 - 6 p. - Published in : PoS Hadron2017 (2018) 181 Fulltext: PDF; External link: PoS server
In : XVII International Conference on Hadron Spectroscopy and Structure, Salamanca, Spain, 25 - 29 Sep 2017, pp.181

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2019-04-25
06:31
Recent NA48/2 results on QCD and ChPT / Piandani, Roberto (INFN, Pisa ; Pisa U.) /NA48/2
The NA48/2 experiment at CERN collected a very large sample of charged kaon decays into multiple final states.This data allow measurements related to QCD and Chiral Perturbation Theory (ChPT). In particular, we collected about 1500 events of the very rare decay $K^{\pm} \rightarrow \mu^{\pm} \nu e^+ e^-$ over almost negligible background in the region with m(e$^+$e$^-$) above 140 MeV, which is of great interest in Chiral Perturbation Theory, thanks to the $m_{ee}$ spectrum and a model-independent measurement of the decay rate for this region. [...]
SISSA, 2018 - 6 p. - Published in : PoS Hadron2017 (2018) 172 Fulltext: PDF; External link: PoS server
In : XVII International Conference on Hadron Spectroscopy and Structure, Salamanca, Spain, 25 - 29 Sep 2017, pp.172

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2019-04-25
06:31
CMS recent results in heavy flavour production and properties / Pompili, Alexis (Bari U. ; INFN, Bari) /CMS
Recent CMS results in the field of Heavy Flavour production and properties are reviewed.The measurement of differential prompt production cross sections of S-wave quarkonia in pp collisions at the center-of-mass energy $\sqrt{s}=13$TeV is reported since these are important for the study of the heavy-quark production mechanisms in quantum chromodynamics (QCD). The dependencies on transverse momentum and rapidity are investigated; comparisons with theory expectations and between different collision energies are provided as well. [...]
SISSA, 2018 - 10 p. - Published in : PoS Hadron2017 (2018) 167 Fulltext: PDF; External link: PoS server
In : XVII International Conference on Hadron Spectroscopy and Structure, Salamanca, Spain, 25 - 29 Sep 2017, pp.167

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