Halbach arrays made of bulk melt-textured YBa2Cu3O7-δ superconductors are very promising systems to generate magnetic flux density gradients exceeding those given by classic Halbach arrays using permanent magnets. When assembling an array made of bulk superconductors, the challenge is to prevent a reorganization of induced currents in the superconductors and their subsequent demagnetization....
In this communication, we demonstrate numerically and experimentally the remarkable DC magnetic screening ability of hybrid superconducting screens combining a 30 mm-diameter disk-shaped superconducting bulk with different closed superconducting loops made from coated conductors. The loops are placed coaxially with the bulk. The axial, DC and inhomogeneous field to be screened is produced by...
This study delves into the application of sparse sensor placement, a data-driven approach that hinges on identifying an optimal orthogonal basis for representing the angular dependency of high-temperature superconducting tapes and other devices. The proposed method offers the potential to expedite measurements and computations substantially by acquiring data at select locations and...
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Filamenting is crucial for reducing AC losses in superconducting coated conductor tapes and cables. However, the metallic stabilizing layer can lead to additional energy dissipation due to coupling currents. Estimating AC losses in such cases is challenging due to the complex geometry of the cable. We demonstrate a FEM numerical model suitable for estimation of the AC losses in different...
This work presents the modelling done to
optimize the pole geometry to be used in the planned high
temperature superconducting bulk undulator in PSI. The H-ϕ
formulation is used to model the undulator field and the
magnetic forces inside the poles. A T-shaped pole with a width
of 10 mm and height of 8 mm was found to be optimal to
maximize the peak undulator field. This model was...
This work presents a 2D FEM modeling approach for a straight soldered ReBCO stack cable within Comsol Multiphysics, focusing on high magnetic field environments. The model incorporates a detailed structure of the ReBCO tapes, including properties like resistivity for the electromagnetic model, as well as the solder shell surrounding the tapes. Critical current dependence on magnetic field...
The development of compact REBCO HTS coils (Rare-EarthBiCaCuO High Temperature Superconductor) with large energy densities face two issues. The first is destructive thermal runaway induced by local dissipative zones, the second is dynamic field homogeneity. The first issue, thermal runaway, may be solved by using a non-insulation or partial insulation technique. These techniques however affect...
Abstract—CERN’s next generation particle accelerator, the Future Circular Collider (FCC), aims to reach center-of-mass collision energies of 100 TeV with a 91 km tunnel where charged particles are accelerated and collided. One of the key devices in circular accelerators is the beam screen, responsible for shielding the steering and focusing magnets from the synchrotron radiation generated by...
