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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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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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3.
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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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4.
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Training-free performance of the wax-impregnated SuShi septum magnet
/ Barna, D (Wigner RCP, Budapest) ; Brunner, K (Wigner RCP, Budapest) ; Novák, M (Wigner RCP, Budapest) ; Borburgh, J (CERN) ; Atanasov, M (CERN) ; Lackner, F (CERN) ; Olvegård, M (Uppsala U.) ; Pepitone, K (Uppsala U.) ; Santiago Kern, R (Uppsala U.) ; Svanberg, C (Uppsala U.) et al.
In the framework of the Future Circular Collider Study a new septum magnet concept, nicknamed ‘SuShi’ has been developed, and a prototype was built at Wigner Research Center for Physics, and tested at the FREIA facility of Uppsala University in April 2023. The concept uses a canted cosine theta (CCT)-like superconducting magnet and a passive superconducting shield to create a zero-field and high-field region within its aperture. [...]
2024 - 12 p.
- Published in : Supercond. Sci. Technol. 37 (2024) 045006
Fulltext: PDF;
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5.
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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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6.
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Design optimization of the water-cooled coil for the LEIR extraction septum
/ Lackner, Friedrich (CERN) ; Balhan, Bruno (CERN) ; Motschmann, Fritz (CERN) ; Borburgh, Jan (CERN) ; Atanasov, Miroslav (CERN) ; Masson, Thierry (CERN) ; Erends, Vera (Utrecht U.)
A pulsed septum magnet (SMH40) is used for heavy ion extraction from the Low Energy Ion Ring (LEIR). A non-conformity on the coil cooling circuit made it necessary to consolidate the design of the septum blade and related manufacturing process. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) THPM019
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.THPM019
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7.
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Slow extraction with octupoles at CERN proton synchrotron to improve extraction efficiency
/ Taylor, R (CERN ; Imperial Coll., London) ; Fraser, M (CERN) ; Arrutia, P (CERN) ; Johnson, E (CERN) ; Benedetto, E (Unlisted, CH)
The extraction inefficiency of the slow extraction process induces radioactivity in the area surrounding the electrostatic septum. Studies at the CERN Proton Synchrotron (PS) are investigating beam loss reduction techniques to improve the efficiency of the beams provided to the experiments of the East Area. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) MOPM071
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPM071
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8.
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Demonstration of non-local crystal shadowing at the CERN SPS
/ Velotti, F M (CERN) ; Fraser, M (CERN) ; Sota, P A Arrutia (CERN) ; Calviani, M (CERN) ; Di Castro, M (CERN) ; Cettour Cave, S (CERN) ; Donze, M (CERN) ; Esposito, L S (CERN) ; Goddard, B (CERN) ; Kain, V (CERN) et al.
The main SPS users are the experiments installed in North experimental Area (NA) which are served with a continuous 4.8 s long spill of protons and heavy ions. A third-integer resonant slow extraction is used to provide a uniform, long spill. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) MOPA098
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPA098
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9.
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Protection of extraction septa during asynchronous beam dumps in HL-LHC operation
/ Farina, E (CERN) ; Atanasov, M (CERN) ; Borburgh, J (CERN) ; Bracco, C (CERN) ; Dutheil, Y (CERN) ; Lechner, A (CERN) ; Maestre, J (CERN) ; Muñoz, P Andreu (CERN) ; Nuiry, F X (CERN) ; Schwarz, P (CERN) et al.
The LHC beam dump system was developed to safely and reliably dispose of the LHC beams at the end of physics fills or in case of emergency aborts. The beams are extracted by means of kicker magnets, deflecting the beams horizontally, and septa, which provide a vertical kick. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) MOPA100
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPA100
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10.
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Production of slow extracted beams for CERN's East Area at the Proton Synchrotron
/ Delrieux, M (CERN) ; Sota, P Arrutia (CERN) ; Bass, T (CERN) ; Bilko, K (CERN) ; Coly, M (CERN) ; Cotte, D (CERN) ; Fraser, M A (CERN) ; Garcia Alia, R (CERN) ; Huschauer, A (CERN) ; Lasheen, A (CERN) et al.
Since the upgrade and renovation of the East Experimental Area at CERN during Long Shutdown 2 (LS2: 2019 - 2021), demand has increased for slowly extracted beam from the CERN Proton Synchrotron (PS). The East Area is a multi-user facility carrying out a diverse experimental physics programme. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) MOPA099
Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPA099
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