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Fully-staggered-array bulk Re-Ba-Cu-O short-period undulator: large-scale 3D electromagnetic modelling and design optimization using A-V and H-formulation methods
- Source :
- Superconductor Science and Technology. 34:094002
- Publication Year :
- 2021
- Publisher :
- IOP Publishing, 2021.
-
Abstract
- The development of a new hard x-ray beamline I-TOMCAT equipped with a 1-meter-long short-period bulk high-temperature superconductor undulator (BHTSU) has been scheduled for the upgrade of the Swiss Light Source (SLS 2.0) at the Paul Scherrer Institute (PSI). The very hard x-ray source generated by the BHTSU will increase the brilliance at the beamline by over one order of magnitude in comparison to other state-of-the-art undulator technologies and allow experiments to be carried out with photon energies in excess of 60 keV. One of the key challenges for designing a 1-meter-long (100 periods) BHTSU is the large-scale simulation of the magnetization currents inside 200 staggered-array bulk superconductors. A feasible approach to simplify the electromagnetic model is to retain five periods from both ends of the 1-meter-long BHTSU, reducing the number of degrees of freedom (DOFs) to the scale of millions. In this paper, the theory of the recently-proposed 2D A-V formulation-based backward computation method is extended to calculate the critical state magnetization currents in the ten-period staggered-array BHTSU in 3D. The simulation results of the magnetization currents and the associated undulator field along the electron beam axis are compared with the well-known 3D H-formulation and the highly efficient 3D H-{\phi} formulation method, all methods showing excellent agreement with each other as well as with experimental results. The mixed H-{\phi} formulation avoids computing the eddy currents in the air subdomain and is significantly faster than the full H-formulation method, but is slower in comparison to the A-V formulation-based backward computation. Finally, the fastest and the most efficient A-V formulation in ANSYS 2020R1 Academic is adopted to optimize the integrals of the undulator field along the electron beam axis by optimizing the sizes of the end bulks.<br />Comment: 19 pages, 12 figures
- Subjects :
- Accelerator Physics (physics.acc-ph)
Paper
Photon
Field (physics)
finite element method
FOS: Physical sciences
Applied Physics (physics.app-ph)
01 natural sciences
7. Clean energy
law.invention
Superconductivity (cond-mat.supr-con)
Magnetization
critical state model
law
0103 physical sciences
Materials Chemistry
Eddy current
backward computation
bulk superconductors
The Jan Evetts SUST Award 2021
Electrical and Electronic Engineering
010306 general physics
undulator
010302 applied physics
Physics
Condensed Matter - Superconductivity
Metals and Alloys
Physics - Applied Physics
Undulator
Condensed Matter Physics
Computational physics
Beamline
HTS modelling
Ceramics and Composites
Physics::Accelerator Physics
H-formulation
Physics - Accelerator Physics
Order of magnitude
Swiss Light Source
Subjects
Details
- ISSN :
- 13616668 and 09532048
- Volume :
- 34
- Database :
- OpenAIRE
- Journal :
- Superconductor Science and Technology
- Accession number :
- edsair.doi.dedup.....0b6e24c1df331ff75682430318c5ce4f