3D multiphysics modeling of superconducting cavities with a massively parallel simulation suite

Radiofrequency cavities based on superconducting technology are widely used in particle accelerators for various applications. The cavities usually have high quality factors and hence narrow bandwidths, so the field stability is sensitive to detuning from the Lorentz force and external loads, includ...

Full description

Saved in:
Bibliographic Details
Published in:Physical review. Accelerators and beams 2017-10, Vol.20 (10), p.102001, Article 102001
Main Authors: Kononenko, Oleksiy, Adolphsen, Chris, Li, Zenghai, Ng, Cho-Kuen, Rivetta, Claudio
Format: Article
Language:English
Subjects:
Coherent light
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
External pressure
Harmonic response
Holes
Light sources
Lorentz force
Mathematical analysis
Mechanical analysis
Particle accelerators
Performance degradation
Piezoelectric actuators
Q factors
Radio frequency
Simulation
Stability
Supercomputers
Superconductivity
Three dimensional models
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Radiofrequency cavities based on superconducting technology are widely used in particle accelerators for various applications. The cavities usually have high quality factors and hence narrow bandwidths, so the field stability is sensitive to detuning from the Lorentz force and external loads, including vibrations and helium pressure variations. If not properly controlled, the detuning can result in a serious performance degradation of a superconducting accelerator, so an understanding of the underlying detuning mechanisms can be very helpful. Recent advances in the simulation suite ace3p have enabled realistic multiphysics characterization of such complex accelerator systems on supercomputers. In this paper, we present the new capabilities in ace3p for large-scale 3D multiphysics modeling of superconducting cavities, in particular, a parallel eigensolver for determining mechanical resonances, a parallel harmonic response solver to calculate the response of a cavity to external vibrations, and a numerical procedure to decompose mechanical loads, such as from the Lorentz force or piezoactuators, into the corresponding mechanical modes. These capabilities have been used to do an extensive rf-mechanical analysis of dressed TESLA-type superconducting cavities. The simulation results and their implications for the operational stability of the Linac Coherent Light Source-II are discussed.
ISSN:2469-9888
2469-9888
DOI:10.1103/PhysRevAccelBeams.20.102001