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Hybrid on-axis and off-axis top-up injection at the future circular lepton collider
/ Yue, Sen (CERN) ; Dutheil, Yann (CERN) ; Bartmann, Wolfgang (CERN) ; Johnson, Eliott (CERN) ; Martinek, Petr (CERN)
In order to maximize the integrated luminosity of the future circular lepton collider (FCC-ee), a top-up injection scheme is required. Amongst the four operation modes of FCC-ee, the Z operation mode has the highest stored beam energy in the collider ring with about 20 MJ per beam. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) WEPR13
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.WEPR13
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2.
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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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3.
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A new baseline layout for the FCC-hh ring
/ Perez-Segurana, Gustavo (CERN) ; Abramov, Andrey (CERN) ; Zimmermann, Frank (CERN) ; Giovannozzi, Massimo (CERN) ; Benedikt, Michael (CERN) ; Bruce, Roderik (CERN) ; Risselada, Thys (CERN) ; Bartmann, Wolfgang (CERN)
The Future Circular Collider (FCC) study includes two accelerators, a high-energy lepton collider (FCC-ee) and an energy-frontier hadron collider (FCC-hh). Both machines share the same tunnel infrastructure. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) MOPC14
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.MOPC14
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4.
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CERN SPS Dilution Kicker Vacuum Pressure Behaviour under Unprecedented Beam Brightness
/ Velotti, Francesco (CERN) ; Barnes, Michael (CERN) ; Bartmann, Wolfgang (CERN) ; Bartosik, Hannes (CERN) ; Carlier, Etienne (CERN) ; Favia, Giorgia (CERN) ; Karpov, Ivan (CERN) ; Li, Kevin (CERN) ; Magnin, Nicolas (CERN) ; Mether, Lotta (CERN) et al.
The Super Proton Synchrotron (SPS) is the second largest synchrotron at CERN and produces high-brightness beams for the Large Hadron Collider (LHC). Recently, the dilution kicker (MKDH) of the SPS beam dump system (SBDS) has demonstrated unanticipated behaviour under high beam brightness conditions. [...]
2024 - 4 p.
- Published in : JACoW HB 2023 (2024) 447-450
Fulltext: PDF;
In : 68th ICFA Advanced Beam Dynamics workshop on high-Intensity and High-Brightness Hadron Beams (HB 2023), CERN, Geneva, Switzerland, 9 - 13 Oct 2023, pp.447-450
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FCC-ee $e^+e^-$ Injection and Booster rRng
/ Ramjiawan, Rebecca (CERN) ; Barnes, Michael (CERN) ; Bartmann, Wolfgang (CERN) ; Borburgh, Jan (CERN) ; Chancé, Antoine (Saclay) ; Dalena, Barbara (IRFU, Saclay) ; Dutheil, Yann (CERN) ; Hofer, Michael (CERN) ; Howling, Emily (Royal Holloway, U. of London) ; Hunchak, Patrick (Saskatchewan U.)
The Future Circular electron-positron Collider (FCC-ee) is a proposal for a 91.17 km collider, which would operate in four modes with energies ranging from 45.6 GeV (Z-pole) to 182.5 GeV (ttbar-production). At high energies the beam lifetime could be as low as 6 minutes, requiring the beam to be continuously topped up to reach a high integrated luminosity. [...]
2023 - 9 p.
- Published in : JACoW eeFACT 2022 (2023) 227-235
Fulltext: PDF;
In : 65th ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+ e- Colliders (eeFACT2022), INFN, Frascati, Italy, 12 - 16 Sep 2022, pp.227-235
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Mitigation of High Voltage Breakdown of the Beam Screen of a CERN SPS Injection Kicker Magnet
/ Barnes, Michael (CERN) ; Bartmann, Wolfgang (CERN) ; Díaz Zumel, Miguel (CERN) ; Ducimetière, Laurent (CERN) ; Feliciano, Luis (CERN) ; Kramer, Thomas (CERN) ; Namora, Vasco (CERN) ; Stadlbauer, Tobias (CERN) ; Standen, Dylan (CERN) ; Trubacova, Pavlina (CERN) et al.
The SPS injection kicker magnets (MKP) were developed in the 1970’s, before beam induced power deposition was considered an issue. These magnets are very lossy from a beam impedance perspective: this is expected to be an issue during SPS operation with the higher intensity beams needed for HL-LHC. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 2868-2871
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.2868-2871
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7.
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Concepts and Considerations for FCC-ee Top-Up Injection Strategies
/ Ramjiawan, Rebecca (CERN) ; Aiba, Masamitsu (PSI, Villigen) ; Bartmann, Wolfgang (CERN) ; Dutheil, Yann (CERN) ; Hofer, Michael (CERN) ; Hunchak, Patrick (PSI, Villigen)
The Future Circular electron-positron Collider (FCC-ee) is proposed to operate in four modes, with beam energies from 45.6 GeV (Z-pole) to 182.5 GeV (tt-bar production) and luminosities up to 4.6×10³⁶ cm²s⁻¹. At the highest energies the beam lifetime would be less than one hour, meaning that top-up injection will be crucial to maximise the integrated luminosity. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 2106-2109
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.2106-2109
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8.
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Commissioning of the ELENA Electrostatic Transfer Lines for the Antimatter Facility at CERN
/ Dutheil, Yann (CERN) ; Bartmann, Wolfgang (CERN) ; Carli, Christian (CERN) ; Fraser, Matthew (CERN) ; Gamba, Davide (CERN) ; Ponce, Laurette (CERN)
ELENA is a small synchrotron ring that decelerates antiprotons down to a kinetic energy of 100 keV. With an experimental complex capable of housing up to 9 different experiments operating simultaneously, the transfer line design needed to be highly flexible. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 2110-2113
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.2110-2113
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The FCCee Pre-Injector Complex
/ Craievich, Paolo (PSI, Villigen) ; Alharthi, Fahad (IJCLab, Orsay) ; Auchmann, Bernhard (PSI, Villigen) ; Bartmann, Wolfgang (CERN) ; Benedikt, Michael (CERN) ; Besana, Maria Ilaria (CERN) ; Bettoni, Simona (PSI, Villigen) ; Braun, Hans-Heinrich (PSI, Villigen) ; Calviani, Marco (CERN) ; Chaikovska, Iryna (IJCLab, Orsay) et al.
The international FCC study group published in 2019 a Conceptual Design Report for an electron-positron collider with a centre-of-mass energy from 90 to 365 GeV with a beam currents of up to 1.4 A per beam. The high beam current of this collider create challenging requirements on the injection chain and all aspects of the linac need to be carefully reconsidered and revisited, including the injection time structure. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 2007-2010
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.2007-2010
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10.
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Studies on Top-Up Injection into the FCC-ee Collider Ring
/ Hunchak, Patrick (Saskatchewan U., CLS ; Saskatchewan U.) ; Aiba, Masamitsu (PSI, Villigen) ; Bartmann, Wolfgang (CERN) ; Boland, Mark (Saskatchewan U., CLS ; Saskatchewan U.) ; Dutheil, Yann (CERN) ; Hofer, Michael (CERN) ; Ramjiawan, Rebecca (CERN) ; Zimmermann, Frank (CERN)
In order to maximize the luminosity production time in the FCC-ee, top-up injection will be employed. The positron and electron beams will be accelerated to the collision energy in the booster ring before being injected with either a small transverse or longitudinal separation to the stored beam. [...]
2022 - 4 p.
- Published in : JACoW IPAC 2022 (2022) 1699-1702
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1699-1702
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