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1.
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Magnets for a Muon Collider—Needs and Plans
/ Bottura, L (CERN) ; Accettura, C (CERN) ; Amemiya, N (Kyoto U.) ; Auchmann, B (PSI, Villigen) ; Berg, J S (Brookhaven Natl. Lab.) ; Bersani, A (INFN, Genoa) ; Bertarelli, A (CERN) ; Boattini, F (CERN) ; Bordini, B (CERN) ; Borges de Sousa, P (CERN) et al.
We describe the magnet challenges for a Muon Collider, an exciting option considered for the future of particle physics at the energy frontier. Starting from the comprehensive work performed by the US Muon Accelerator Program, we have reviewed the performance specifications dictated by beam physics and the operating conditions to satisfy the accelerator needs. [...]
2024 - 8 p.
- Published in : IEEE Trans. Appl. Supercond. 34 (2024) 1-8
Fulltext: PDF;
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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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A Work Proposal for a Collaborative Study of Magnet Technology for a Future Muon Collider
/ Bottura, L. (CERN) ; Aguglia, D. (CERN) ; Auchmann, B. (PSI, Villigen) ; Arndt, T. (KIT, Karlsruhe) ; Beard, J. (LNCMI, Grenoble) ; Bersani, A. (INFN, Genoa) ; Boattini, F. (CERN) ; Breschi, M. (Bologna U.) ; Caiffi, B. (INFN, Genoa) ; Chaud, X. (LNCMI, Grenoble) et al.
In this paper we elaborate on the nature and challenges for the magnet systems of a muon collider as presently considered within the scope of the International Muon Collider Collaboration (IMCC). [...]
arXiv:2203.13998.
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9 p.
eConf - Fulltext
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8.
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A Strategic Approach to Advance Magnet Technology for Next Generation Colliders
/ Ambrosio, G. (Fermilab) ; Amm, K. (Brookhaven Natl. Lab.) ; Anerella, M. (Brookhaven Natl. Lab.) ; Apollinari, G. (Fermilab) ; Arbelaez, D. (LBNL, Berkeley) ; Auchmann, B. (PSI, Villigen) ; Balachandran, S. (Natl. High Mag. Field Lab.) ; Baldini, M. (Fermilab) ; Ballarino, A. (CERN) ; Barua, S. (Natl. High Mag. Field Lab.) et al.
Colliders are built on a foundation of superconducting magnet technology that provides strong dipole magnets to maintain the beam orbit and strong focusing magnets to enable the extraordinary luminosity required to probe physics at the energy frontier. [...]
arXiv:2203.13985 ; FERMILAB-CONF-22-283-TD.
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Fermilab Library Server - eConf - Fulltext - Fulltext
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9.
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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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10.
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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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