Document Type

Conference Paper

Publication Date


Publication Title

North American Particle Accelerator Conference Proceedings



Conference Name

North American Particle Accelerator Conference, Pasadena, California, September 29-October 4, 2013


The current requirements of higher gradients and strict dimensional constraints in the emerging applications have required the designing of compact deflecting and crabbing rf structures. The superconducting rf-dipole cavity is one of the first novel compact designs with attractive properties such as higher gradients, higher shunt impedance and widely separated higher order modes. The recent tests performed on proof-of-principle designs of the rf-dipole geometry at 4.2 K and 2.0 K in a vertical test assembly have proven the designs to achieve higher gradients with higher intrinsic quality factors and easily processed multipacting conditions. The design frequency sensitivity to pressure (df/dp) due to liquid He pressure fluctuations, Lorentz force detuning due to radiation pressure, and thermal and mechanical effects have also been measured during the tests. These effects lead to cavity frequency detuning while in operation and therefore needs to be reduced. This paper presents the detailed comparison of the measurement to the simulation results obtained from ANSYS.


Published under a Creative Commons Attribution 3.0 unported license.

Original Publication Citation

Park, H., De Silva, S. U., & Delayen, J. R. (2013). Comparison of electromagnetic, thermal and mechanical calculations with rf test results in rf-dipole deflecting/crabbing cavities. Paper presented at the North American Particle Accelerator Conference, Pasadena, CA, USA.


0000-0002-4809-9439 (De Silva), 0000-0002-8222-8740 (Delayen)