Bortot, L. ; Mentink, M. ; Petrone, C. ; Van Nugteren, J. ; Deferne, G. ; Koettig, T. ; Kirby, G. ; Pentella, M. ; Perez, J. C. ; Pincot, F. O. ; De Rijk, G. ; Russenschuck, S. ; Verweij, A. P. ; Schöps, S. (2024)
High-temperature superconducting screens for magnetic field-error cancellation in accelerator magnets.
In: Superconductor Science and Technology, 2021, 34 (10)
doi: 10.26083/tuprints-00020507
Artikel, Zweitveröffentlichung, Verlagsversion
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Kurzbeschreibung (Abstract)
Accelerators magnets must have minimal magnetic field imperfections to reduce particle-beam instabilities. In the case of coils made of high-temperature superconducting (HTS) tapes, the magnetization due to persistent currents adds an undesired field contribution, potentially degrading the magnetic field quality. In this paper we study the use of superconducting screens based on HTS tapes for reducing the magnetic field imperfections in accelerator magnets. The screens exploit the magnetization by persistent currents to cancel out the magnetic field error. The screens are aligned with the main field component, such that only the undesired field components are compensated. The screens are self-regulating, and do not require any externally applied source of energy. Measurements in liquid nitrogen at 77 K show for dipole-field configurations a significant reduction of the magnetic field error up to a factor of four. The residual error is explained via numerical simulations accounting for the geometric defects in the HTS screens, achieving satisfactory agreement with experimental results. Simulations show that if screens are increased in width and thickness, and operated at 4.5 K, field errors may be eliminated almost entirely for the typical excitation cycles of accelerator magnets.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2024 |
| Autor(en): | Bortot, L. ; Mentink, M. ; Petrone, C. ; Van Nugteren, J. ; Deferne, G. ; Koettig, T. ; Kirby, G. ; Pentella, M. ; Perez, J. C. ; Pincot, F. O. ; De Rijk, G. ; Russenschuck, S. ; Verweij, A. P. ; Schöps, S. |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | High-temperature superconducting screens for magnetic field-error cancellation in accelerator magnets |
| Sprache: | Englisch |
| Publikationsjahr: | 5 März 2024 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 2021 |
| Ort der Erstveröffentlichung: | Bristol |
| Verlag: | IOP Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Superconductor Science and Technology |
| Jahrgang/Volume einer Zeitschrift: | 34 |
| (Heft-)Nummer: | 10 |
| Kollation: | 14 Seiten |
| DOI: | 10.26083/tuprints-00020507 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/20507 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung DeepGreen |
| Kurzbeschreibung (Abstract): | Accelerators magnets must have minimal magnetic field imperfections to reduce particle-beam instabilities. In the case of coils made of high-temperature superconducting (HTS) tapes, the magnetization due to persistent currents adds an undesired field contribution, potentially degrading the magnetic field quality. In this paper we study the use of superconducting screens based on HTS tapes for reducing the magnetic field imperfections in accelerator magnets. The screens exploit the magnetization by persistent currents to cancel out the magnetic field error. The screens are aligned with the main field component, such that only the undesired field components are compensated. The screens are self-regulating, and do not require any externally applied source of energy. Measurements in liquid nitrogen at 77 K show for dipole-field configurations a significant reduction of the magnetic field error up to a factor of four. The residual error is explained via numerical simulations accounting for the geometric defects in the HTS screens, achieving satisfactory agreement with experimental results. Simulations show that if screens are increased in width and thickness, and operated at 4.5 K, field errors may be eliminated almost entirely for the typical excitation cycles of accelerator magnets. |
| Freie Schlagworte: | high-temperature superconductors, magnetic field quality, screening currents, persistent magnetization, superconducting magnetic screens, finite-element analysis, accelerator magnets |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-205075 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 600 Technik, Medizin, angewandte Wissenschaften > 621.3 Elektrotechnik, Elektronik |
| Fachbereich(e)/-gebiet(e): | 18 Fachbereich Elektrotechnik und Informationstechnik 18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Teilchenbeschleunigung und Theorie Elektromagnetische Felder > Computational Electromagnetics 18 Fachbereich Elektrotechnik und Informationstechnik > Institut für Teilchenbeschleunigung und Theorie Elektromagnetische Felder |
| Hinterlegungsdatum: | 05 Mär 2024 10:48 |
| Letzte Änderung: | 07 Mär 2024 10:28 |
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