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The Superconducting Testing Facility (STF) is a project at KEK, Japan to build and operate a test linac with high-gradient superconducting cavities KEK STF website. Its phase I will have a 4-cavity chained superstructure shown in the following,
The STF 4-cavity superstructure was simulated at NCCS through an INCTIE/LCF award. The following shows the electromagnetic field distribution of a trapped dipole mode in the STF superstructure.
Click here to see an animated gif picture which shows the field distribution of the trapped mode as one traverses along the structure.
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With the advances in solvers and numerical algorithms, we were able to simulate the ILC 8-cavity cryomodule with both trapped mode analysis using Omega3P and initial wakefield analysis using T3P. The following is a dipole mode pattern in the 3rd dipole band.
The following is the picture of the model we used in EM analysis.
Because of the large aspect ratio, it has become very challenging to visualize the modes in the cryomodule. Collaborating with the SciDAC Visualization researchers, we are addressing this issue.
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