9th International Workshop on Numerical Modelling of High Temperature Superconductors - HTS 2024

Session

Session 3: Applications

12 Jun 2024, 15:20

Paul Scherrer Institute (PSI)

18. How to increase the field gradient produced by a superconducting Halbach array by modifying its geometric parameters?

Philippe Vanderbemden (University of Liege)

12/06/2024, 15:20

Oral

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....

15. Hybrid superconducting screens combining disk-shaped bulks and closed-loop coated conductors: modelling and experimental validation

Nicolas Rotheudt (University of Liège)

12/06/2024, 15:40

Oral

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...

16. A parameter-free reconstruction of HTS critical current magnetic field - angular dependency with sparse measurements

Dr Paweł Lasek (Silesian University of Technology)

12/06/2024, 16:00

Oral

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...

35. Multi-physics considerations of NI HTS Solenoid for PSI Positron Production Experiment

Jaap Kosse (PSI - Paul Scherrer Institut)

12/06/2024, 16:20

Oral

Please see the attachment for the abstract

17. Computing Hysteresis and Coupling AC losses in round cable made from filamented HTS tapes

Mykola Soloviov (Institute of Electrical Engineering, Slovak Academy of Sciences (SAS))

13/06/2024, 09:00

Oral

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...

51. Design Optimization of Ferromagnetic Poles for a High Temperature Superconducting Bulk Undulator

Carlos Gafa (PSI - Paul Scherrer Institut)

13/06/2024, 09:20

Oral

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...

39. Coupled Axial and Transverse Currents Method for Periodic Superconductors Modelling

Julien Dular (CERN)

13/06/2024, 09:40

Oral

In this contribution, we present a fast and accurate finite element approach for modelling the electric and magnetic behavior of periodic composite superconducting conductors. It uses two coupled two-dimensional models and accounts for the conductor periodicity via circuit equations. This allows to capture three-dimensional effects while leading to a significant reduction in computational time...

37. 2D FEM electro-magnetic modelling of straight soldered ReBCO stack cable in high magnetic field

Dmitry Sotnikov (PSI - Paul Scherrer Institut)

13/06/2024, 10:00

Oral

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...

57. Predicting the behavior of insulated REBCO coils up to their operation limit to identify safe operation domain

Dr arnaud badel (Université Grenoble Alpes - CNRS)

13/06/2024, 11:00

Oral

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...

20. High Temperature Superconducting Coating for the Beam Screen of the Future Circular Collider

Guilherme Telles (Institut de Ciència de Materials de Barcelona (ICMAB - CSIC))

13/06/2024, 11:20

Oral

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...