CERN Accelerating science

SPS and CNGS

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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
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
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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2019-04-24
06:12
Analysis and Operational Feedback of the New High-Energy Beam Dump in the CERN SPS / Perillo-Marcone, Antonio (CERN) ; Calviani, Marco (CERN) ; Illan Fiastre, Ricardo (CERN) ; Rios Rodriguez, Paula (CERN) ; Romagnoli, Giulia (CERN)
The CERN Super Proton Synchrotron (SPS) high-energy internal dump (TIDVG) is used to intercept beam dumps from 10².2 to 450 GeV. An inspection in 2013 revealed significant beam induced damage to the aluminium absorbing block, resulting in operational limitations to minimize the risk of reproducing this phenomenon. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-WEPMG003 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPMG003

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2019-04-24
06:12
LHC Injectors Upgrade Project: Outlook of the Modifications to the Super Proton Synchrotron (SPS) Vacuum System and Impact on the Operation of the Carbon-Coated Vacuum Chambers / Pasquino, Chiara (CERN) ; Bregliozzi, Giuseppe (CERN) ; Chiggiato, Paolo (CERN) ; Cruikshank, Paul (CERN) ; Farricker, Aaron (CERN) ; Harrison, Anthony (CERN) ; Perez Espinos, Jaime (CERN) ; Somoza, Jose (CERN) ; Taborelli, Mauro (CERN) ; Vollinger, Christine (CERN) et al.
Aiming at doubling the beam intensity and reducing the beam emittance [1], significant modifications of the LHC injector chain will take place during Long Shutdown 2 (LS2), starting from 2019. The LIU project (LHC Injector Upgrade) [2], in the specific, touches Linac4, the Proton Synchrotron Booster (PSB), the Proton Synchrotron (PS), the Super Proton Synchrotron (SPS). [...]
2018 - 3 p. - Published in : 10.18429/JACoW-IPAC2018-WEPMF087 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPMF087

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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.
Full text

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2019-04-19
09:36
First Beam Test of Laser Engineered Surface Structures (LESS) at Cryogenic Temperature in CERN SPS Accelerator / Salemme, Roberto (CERN ; Euratom, St. Paul Lez Durance) ; Abdolvand, Amin (Dundee U.) ; Baglin, Vincent (CERN) ; Calatroni, Sergio (CERN) ; Chiggiato, Paolo (CERN) ; Di Girolamo, Beniamino (CERN) ; Garcia-Tabares Valdivieso, Elisa (CERN) ; Jenninger, Berthold (CERN) ; Prever-Loiri, Laurent (CERN) ; Sitko, Monika (CERN) et al.
Electron cloud mitigation is an essential requirement for accelerators of positive particles with high intensity beams to guarantee beam stability and limited heat load in cryogenic systems. Laser Engineered Surface Structures (LESS) are being considered, within the High Luminosity upgrade of the LHC collider at CERN (HL-LHC), as an option to reduce the Secondary Electron Yield (SEY) of the surfaces facing the beam, thus suppressing the electron cloud phenomenon. [...]
2018 - 4 p. - Published in : (2018) , pp. WEPMG005
- Published in : J. Phys. : Conf. Ser.: 1067 (2018) , no. 8, pp. 082017 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPMG005

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2019-04-19
09:36
Design of the Future High Energy Beam Dump for the CERN SPS / Pianese, Stefano (CERN) ; Briz Monago, Jose (CERN) ; Calviani, Marco (CERN) ; Grenier, Damien (CERN) ; Heckmann, Philipp (CERN) ; Humbert, Jerome (CERN) ; Illan Fiastre, Ricardo (CERN) ; Perillo-Marcone, Antonio (CERN) ; Romagnoli, Giulia (CERN) ; Sgobba, Stefano (CERN) et al.
The future CERN Super Proton Synchrotron (SPS) in- ternal dump (Target Internal Dump Vertical Graphite, known as TIDVG#5), has been designed within the frame- work of the LHC Injectors Upgrade (LIU) Project. It will be installed during CERN’s Long Shutdown 2 (2019-2020) and will be built to intercept beam dumps from 14 to 450 GeV. [...]
2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-WEPMG004 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPMG004

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2019-04-13
06:01
Plasma wakefield acceleration experiments at FACET II / Joshi, C (UCLA) ; Adli, E (Oslo U.) ; An, W (UCLA) ; Clayton, C E (UCLA) ; Corde, S (Palaiseau, Lab. Opt. Appl.) ; Gessner, S (CERN) ; Hogan, M J (SLAC) ; Litos, M (Colorado U.) ; Lu, W (Tsinghua U., Beijing, Dept. Eng. Phys.) ; Marsh, K A (UCLA) et al.
During the past two decades of research, the ultra-relativistic beam-driven plasma wakefield accelerator (PWFA) concept has achieved many significant milestones. These include the demonstration of ultra-high gradient acceleration of electrons over meter-scale plasma accelerator structures, efficient acceleration of a narrow energy spread electron bunch at high-gradients, positron acceleration using wakes in uniform plasmas and in hollow plasma channels, and demonstrating that highly nonlinear wakes in the 'blow-out regime' have the electric field structure necessary for preserving the emittance of the accelerating bunch. [...]
2018 - 14 p. - Published in : Plasma Phys. Control. Fusion 60 (2018) 034001 Fulltext: PDF;

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