Cos-theta Nb3Sn Dipole for a Very Large Hadron Collider

Zlobin, A.V.

doi:10.1007/978-3-030-16118-7_7

Cited by 1 publication

(1 citation statement)

References 21 publications

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“…In the innermost two layers HTS cable turns are wound into individual slots in the coil support structure, as in a canted cos-theta (CCT) design [31]- [33]. In the two central layers, groups of turns (turn blocks) are wound in the coil structure groves, as it is done in the Stress Management cos-theta (SMCT) design [34]- [36]. Finally, the two outermost layers can be defined a traditional cos-theta coil with turn blocks separated by spacers [37], [38].…”

Section: A Cos-theta (Ct) Designmentioning

confidence: 99%

Conceptual Design of 20 T Hybrid Accelerator Dipole Magnets

Ferracin

Ambrosio

Anerella

et al. 2023

IEEE Trans. Appl. Supercond.

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Hybrid magnets are currently under consideration as an economically viable option towards 20 T dipole magnets for next generation of particle accelerators. In these magnets, High Temperature Superconducting (HTS) materials are used in the high field part of the coil with so-called "insert coils", and Low Temperature Superconductors (LTS) like Nb3Sn and Nb-Ti superconductors are used in the lower field region with so-called "outsert coils". The attractiveness of the hybrid option lays on the fact that, on the one hand, the 20 T field level is beyond the Nb3Sn practical limits of 15-16 T for accelerator magnets and can be achieved only via HTS materials; on the other hand, the high cost of HTS superconductors compared to LTS superconductors makes it advantageous exploring a hybrid approach, where the HTS portion of the coil is minimized. We present in this paper an overview of different design options aimed at generating 20 T field in a 50 mm clear aperture. The coil layouts investigated include the Cos-theta design (CT), with its variations to reduce the conductor peak stress, namely the Canted Costheta design (CCT) and the Stress Management Cos-theta design (SMCT), and, in addition, the Block-type design (BL) including a form of stress management and the Common-Coil design (CC). Results from a magnetic and mechanical analysis are discussed, with particular focus on the comparison between the different options regarding quantity of superconducting material, field quality, conductor peak stress, and quench protection.

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