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1.
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Upgrade of the CERN SPS Extraction Protection Elements TPS
/ Borburgh, Jan (CERN) ; Balhan, Bruno (CERN) ; Barnes, Michael (CERN) ; Baud, Cedric (CERN) ; Fraser, Matthew (CERN) ; Kain, Verena (CERN) ; Maciariello, Fausto (CERN) ; Steele, Genevieve (CERN) ; Velotti, Francesco (CERN)
In 2006 the protection devices upstream of the septa in both extraction channels of the CERN SPS to the LHC were installed. Since then, new beam parameters have been proposed for the SPS beam towards the LHC in the framework of the LIU project. [...]
2015 - 4 p.
- Published in : 10.18429/JACoW-IPAC2015-WEPMN068
Fulltext: PDF; External link: Full-text at JACoW Server
In : 6th International Particle Accelerator Conference, Richmond, VA, USA, 3 - 8 May 2015, pp.WEPMN068
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2.
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Overview of beam intensity issues and mitigations in the CERN-SPS fast wire scanners
/ Veness, Raymond (CERN) ; Guerrero, Ana (CERN) ; Perez Fontenla, Ana Teresa (CERN) ; Harrison, Anthony (CERN) ; Salvant, Benoit (CERN) ; Zannini, Carlo (CERN) ; Antuono, Chiara (CERN) ; Vollinger, Christine (CERN) ; de la Fuente, Elena (CERN) ; Carra, Federico (CERN) et al.
A new design of fast wire scanner was installed in the CERN injector complex as part of the upgrades linked to the High-Luminosity LHC Project. Initial operations with these beams were good, but during the planned intensity ramp-up one early 2023, all four SPS scanners failed at the same time. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) WEPG26
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPG26
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3.
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Slow extracted spill ripple control in the CERN SPS using adaptive Bayesian optimisation
/ Kain, Verena (CERN) ; Effinger, Ewald (CERN) ; Follin, Fabio (CERN) ; Velotti, Francesco (CERN) ; Fraser, Matthew (CERN) ; Schenk, Michael (CERN) ; Madysa, Nico (Darmstadt, GSI) ; Arrutia Sota, Pablo Andreas (CERN)
The CERN Super Proton Synchrotron (SPS) offers slow-extracted, high-intensity proton beams at 400 GeV/c for 3 fixed targets in the CERN North Experimental Area (NA) with a spill length of about 5 seconds. Since first commissioning in the late seventies, the NA has seen a steady increase in users, many of which requiring improved spill quality control. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) TUPS55
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.TUPS55
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4.
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Optics rematching between TT24 and P42 primary beam lines within the HI-ECN3 study project at CERN
/ Gorn, Aleksandr (CERN) ; Bracco, Chiara (CERN) ; Velotti, Francesco (CERN) ; Bernhard, Johannes (CERN) ; Nevay, Laurence (CERN) ; Dyks, Luke (Oxford U.) ; Fraser, Matthew (CERN)
The High Intensity ECN3 (HI-ECN3) study project aims to increase the intensity of the proton beam delivered to a new experimental facility housed in the ECN3 underground cavern in CERN’s North Area up to the ~4e+13 ppp (protons per pulse) and up to ~4e+19 POT (protons on target) per year. The increase necessitates upgrades of the primary beam transfer lines coming from SPS directly to the new Target Complex upstream of ECN3. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) TUPC71
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.TUPC71
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5.
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SPS injection kicker system: 2023 operational experience and upgrade proposals for high-luminosity LHC
/ Favia, Giorgia (CERN) ; Zannini, Carlo (CERN) ; Standen, Dylan (CERN) ; Velotti, Francesco (CERN) ; Ducimetière, Laurent (CERN) ; Feliciano, Luis (CERN) ; Barnes, Michael (CERN) ; Diaz Zumel, Miguel (CERN) ; Trubacova, Pavlina (CERN) ; Kramer, Thomas (CERN) et al.
The SPS injection kicker system comprises twelve MKP-S (small aperture) modules and four MKP-L (large aperture) modules. An upgraded MKP-L magnet was installed in the SPS, during December 2022, in view of the higher beam intensity needed in the future for High-Luminosity-LHC. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) TUPC38
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.TUPC38
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6.
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Study of the performance and beam loss limitations during injection of high-intensity LHC proton beams
/ Salvachua, Belen (CERN) ; Lechner, Anton (CERN) ; Bracco, Chiara (CERN) ; Zamantzas, Christos (CERN) ; Wollmann, Daniel (CERN) ; Mirarchi, Daniele (CERN) ; Effinger, Ewald (CERN) ; Velotti, Francesco (CERN) ; Trad, Georges (CERN) ; Wenninger, Jorg (CERN) et al.
The LHC Injectors Upgrade project at CERN optimized the injection accelerator chain to deliver proton intensities per bunch of 2.3e+11 ppb. Throughout 2023, the LHC was filled with up to 2464 bunches per beam using a hybrid injection scheme, involving up to 236 bunches per injection, with a maximum intensity per bunch of 1.6e+11 ppb. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) THPR31
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.THPR31
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7.
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Enhancing CERN-SPS slow extraction efficiency: meta Bayesian optimisation in crystal shadowing
/ Velotti, Francesco (CERN) ; Matheson, Eloise (CERN) ; Esposito, Luigi Salvatore (CERN) ; Fraser, Matthew (CERN) ; Solis Paiva, Santiago (CERN) ; Kain, Verena (CERN)
The Super Proton Synchrotron at CERN serves the fixed-target experiments of the North Area, providing protons and ions via slow extraction, and employs the crystal shadowing technique to significantly minimize losses. Over the past three operational years, the use of a crystal, positioned upstream of the electrostatic septum to shadow its blade, has allowed to achieve a 25% reduction in losses. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) MOPS65
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.MOPS65
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8.
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9.
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Performance Improvement Studies of the Fixed Target Beams along the CERN Injector Chain
/ Prebibaj, Tirsi (CERN) ; Asvesta, Foteini (CERN) ; Bartosik, Hannes (CERN) ; Damerau, Heiko (CERN) ; Fraser, Matthew Alexander (CERN) ; Di Giovanni, Gian Piero (CERN) ; Huschauer, Alexander (CERN) ; Li, Kevin Shing Bruce (CERN) ; Schenk, Michael (CERN) ; Velotti, Francesco Maria (CERN)
Within the LHC Injectors Upgrade (LIU) project, LHC injectors received major upgrades that resulted in an unprecedented beam brightness. In the framework of the Physics Beyond Colliders (PBC) study, the full potential of the upgraded injectors is being explored for the improvement of the Fixed Target (FT) beams as well. [...]
CERN-PBC-CONF-2024-009.-
Geneva : CERN, 2024 - 4.
- Published in : JACoW IPAC2024 (2024) THPC14
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.THPC14
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10.
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Empty-bucket techniques for spill-quality improvement at the CERN Super Proton Synchrotron
/ Arrutia Sota, Pablo A (CERN) ; Fraser, Matthew A (CERN) ; Hagmann, Gregoire (CERN) ; Kain, Verena (CERN) ; Papotti, Giulia (CERN) ; Spierer, Arthur (CERN) ; Velotti, Francesco M (CERN) ; Burrows, Philip N (JAI, UK) ; Piandani, Roberto (San Luis Potosi U.)
Synchrotrons can provide long spills of particles by employing resonant extraction where the circulating beam is slowly ejected over thousands to millions of turns by exploiting the amplitude growth caused by a transverse resonance. In the CERN Super Proton Synchrotron (SPS), this method is used to satisfy the experimental requests of the North Area. [...]
2024 - 14 p.
- Published in : Phys. Rev. Accel. Beams 27 (2024) 074001
Fulltext: PDF;
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