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1.
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Chapter 6: Superconducting Magnet Technology for the IR Upgrade
/ Todesco, E (CERN) ; Ambrosio, G (Fermilab) ; Ferracin, P (LBL, Berkeley) ; Sabbi, G L (SLAC) ; Nakamoto, T (KEK, Tsukuba) ; Sugano, M (KEK, Tsukuba) ; Weelderen, R Van (CERN) ; Fabbricatore, P (INFN, Genoa) ; Farinon, S (INFN, Genoa) ; Toral, F (Madrid, CIEMAT) et al.
In this section we present the magnet technology for the High Luminosity LHC. After a short review of the project targets and constraints, we discuss the main guidelines used to determine the technology, the field/gradients, the operational margins, and the choice of the current density for each type of magnet. [...]
2024 - 33 p.
- Published in : Adv. Ser. Direct. High Energy Phys. 31 (2024) 165-197
Fulltext: PDF;
In : The High Luminosity Large Hadron Collider, pp.165-197
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2.
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Evaluation of the Parallel-Scheme Varistors as Energy-Extraction System for a Test Facility of Superconducting Accelerator Magnet
/ Suzuki, K (KEK, Tsukuba) ; Ikemoto, Y (KEK, Tsukuba) ; Nakamoto, T (KEK, Tsukuba) ; Ogitsu, T (KEK, Tsukuba) ; Okada, N (KEK, Tsukuba) ; Sugano, M (KEK, Tsukuba) ; Kirby, G (CERN) ; Galvin, T (Unlisted, GB)
A varistor is a non-linear V - I resistor and its feature helps to extract stored energy of the magnet quickly while suppressing the magnet voltage. High Energy Accelerator Research Organization (KEK) decided to install the varistor for the test facility in order to conduct quench training of a superconducting magnet safely. [...]
2024 - 7 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 9501407
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3.
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Test Results of the First Series Magnet of Beam Separation Dipole for the HL-LHC Upgrade
/ Suzuki, K (KEK, Tsukuba) ; Ikemoto, Y (KEK, Tsukuba) ; Kawamata, H (KEK, Tsukuba) ; Kimura, N (KEK, Tsukuba ; Tokyo U., ICRR) ; Nakamoto, T (KEK, Tsukuba) ; Ogitsu, T (KEK, Tsukuba) ; Okada, N (KEK, Tsukuba) ; Okada, R (KEK, Tsukuba) ; Sugano, M (KEK, Tsukuba) ; Tanaka, K (KEK, Tsukuba) et al.
We report the test results of the first series beam separation dipole, MBXF1, for the HL-LHC project. The magnet has a full length of 7 m and is designed to generate a field integral of 35 T $\cdot$m at a nominal operating current ($I_\text{nominal}$) of 12.11 kA. [...]
2024 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4001805
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4.
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Cold Mass Assembly of First Full-Scale Prototype of Beam Separation Dipole Magnet for the High-Luminosity LHC Upgrade
/ Sugano, M (KEK, Tsukuba) ; Nakamoto, T (KEK, Tsukuba) ; Suzuki, K (KEK, Tsukuba) ; Ogitsu, T (KEK, Tsukuba) ; Ikemoto, Y (KEK, Tsukuba) ; Terashima, A (KEK, Tsukuba) ; Okada, N (KEK, Tsukuba) ; Kimura, N (Tokyo U., ICRR) ; Kido, S (Ibaraki U., Hitachi) ; Chiba, T (Ibaraki U., Hitachi) et al.
As a Japanese contribution to the High-Luminosity Large Hadron Collider (HL-LHC) upgrade, KEK is in charge of developing the beam separation dipole cold masses. The full-scale prototype magnet (MBXFP1) was constructed in Hitachi and powering test at cold was conducted at KEK. [...]
2024 - 6 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 4002106
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5.
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Influence of Axial Strain and Transverse Compressive Load on Critical Current of Nb3Sn Wires for the FCC
/ Nakamoto, M (Sokendai, Tsukuba) ; Sugano, M (KEK, Tsukuba) ; Dhakarwal, M (KEK, Tsukuba) ; Ogitsu, T (KEK, Tsukuba) ; Nishijima, G (Tsukuba Magnet Lab.) ; Awaji, S (Tohoku U. (main)) ; Kawashima, S (Kobe Steel) ; Hopkins, S C (CERN) ; Ballarino, A (CERN)
Nb 3 Sn superconducting wires are under consideration for producing high field accelerator magnets for the proposed Future Circular Collider (FCC) due to their high critical field. R&D; studies are ongoing worldwide with a target non-Cu critical current density ( Jc ) of 1500 A/mm 2 at 4.2 K, 16 T. [...]
2023 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 33 (2023) 8400505
In : Applied Superconductivity Conference, Honolulu, Hawaii, United States, 23 - 28 Oct 2022, pp.8400505
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6.
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Test Result of a Full-Scale Prototype of Beam Separation Dipole Magnet for the High-Luminosity LHC Upgrade
/ Sugano, M (KEK, Tsukuba) ; Suzuki, K (KEK, Tsukuba) ; Nakamoto, T (KEK, Tsukuba) ; Iida, M (KEK, Tsukuba) ; Ikemoto, Y (KEK, Tsukuba) ; Kawamata, H (KEK, Tsukuba) ; Ogitsu, T (KEK, Tsukuba) ; Ohata, H (KEK, Tsukuba) ; Okada, N (KEK, Tsukuba) ; Okada, R (KEK, Tsukuba) et al.
High Energy Accelerator Research Organization (KEK) is developing Nb-Ti based beam separation dipole (MBXF) for the high-luminosity Large Hadron Collider (HL-LHC) upgrade within the framework of CERN–KEK collaboration. This magnet produces field integral of 35 T•m in a 150 mm bore at 12 kA and 1.9 K. [...]
2022 - 7 p.
- Published in : IEEE Trans. Appl. Supercond. 32 (2022) 4003407
In : 27th International Conference on Magnet Technology (MT-27), Fukuoka, Japan, 15 - 19 Nov 2021, pp.4003407
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7.
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Status and challenges of the interaction region magnets for HL-LHC
/ Todesco, E (CERN) ; Izquierdo Bermudez, S (CERN) ; Foussat, A (CERN) ; Gautheron, E (CERN) ; Kirby, G (CERN) ; Felice, H (CERN) ; Perez, J C (CERN) ; Fleiter, J (CERN) ; Barth, C (CERN) ; Milanese, A (CERN) et al.
About one hundred magnets of six different types shall be installed in the High Luminosity LHC (HL-LHC) in the years 2026-2028 at CERN. The magnets design, construction and test are based on CERN collaborations with institutes and industrial partners in USA, Spain, Italy, Japan and China. [...]
FERMILAB-PUB-22-861-TD.-
2023 - 8 p.
- Published in : IEEE Trans. Appl. Supercond. 33 (2023) 4001608
Fulltext: PDF; External link: Fermilab Accepted Manuscript
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8.
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Characterization of the Radiation Resistance of Glass Fiber Reinforced Plastics for Superconducting Magnets
/ Musso, Andrea (CERN) ; Nakamoto, Tatsushi (KEK, Tsukuba) ; Grande, Beatriz Del Valle (Bern U.) ; Borderas, Cinta Lucia Marraco (LPHE, Lausanne) ; Sousa, Daniela Fagundes da (Lisbon, IST) ; Sugano, Michinaka (KEK, Tsukuba) ; Ogitsu, Toru (KEK, Tsukuba) ; Tavares, Sandra Sequeira (Lausanne U.)
The overall performance of accelerator magnets strongly relies on electrical and mechanical robustness of their components. With an increase of the energy, future particle accelerators will have to withstand integral doses of ionizing radiation of up to several tens of MGy. [...]
2022 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 32 (2022) 7700405
In : 27th International Conference on Magnet Technology (MT-27), Fukuoka, Japan, 15 - 19 Nov 2021, pp.7700405
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9.
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Magnetic Measurements of a Full-Scale Prototype of the HL-LHC Beam Separation Dipole
/ Suzuki, K (KEK, Tsukuba) ; Ikemoto, Y (KEK, Tsukuba) ; Kawamata, H (KEK, Tsukuba) ; Kimura, N (Tokyo U., ICRR) ; Nakamoto, T (KEK, Tsukuba) ; Ogitsu, T (KEK, Tsukuba) ; Ohata, H (KEK, Tsukuba) ; Okada, N (KEK, Tsukuba) ; Okada, R (KEK, Tsukuba) ; Sasaki, K (KEK, Tsukuba) et al.
High Energy Research Organization (KEK) has engaged in development of the beam separation dipole, MBXF, toward the HL-LHC project. The magnet has a full length of 7 m and generates a magnetic field of 5.6 T in the magnet center at nominal operating condition of 12 kA and 1.9 K. [...]
2022 - 7 p.
- Published in : IEEE Trans. Appl. Supercond. 32 (2022) 9000407
In : 27th International Conference on Magnet Technology (MT-27), Fukuoka, Japan, 15 - 19 Nov 2021, pp.9000407
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10.
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The High Luminosity LHC interaction region magnets towards series production
/ Todesco, E (CERN) ; Bajas, H (CERN) ; Bajko, M (CERN) ; Ballarino, A (CERN) ; Bermudez, S Izquierdo (CERN) ; Bordini, B (CERN) ; Bottura, L (CERN) ; De Rijk, G (CERN) ; Devred, A (CERN) ; Duarte Ramos, D (CERN) et al.
The High Luminosity Large Hadron Collider (HL-LHC) is the new flagship project of CERN. First endorsed in 2013 and approved in 2016, HL-LHC is an upgrade of the accelerator aiming to increase by a factor of ten the statistics of the LHC collisions at the horizon of 2035–2040. [...]
FERMILAB-PUB-21-134-TD.-
2021 - 38 p.
- Published in : Supercond. Sci. Technol. 34 (2021) 053001
Fulltext: PDF;
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