Measurement of the dielectric properties of high-purity sapphire at 1.865 GHZ from 2-10 Kelvin Conference Paper uri icon


  • A dielectric test cavity was designed and tested to measure the microwave dielectric properties of ultrapure sapphire at cryogenic temperatures. Measurements were performed by placing a large cylindrical crystal of sapphire in a Nb superconducting cavity operating in the TE 01 mode at 1.865 GHz. The dielectric constant, heat capacity, and loss tangent were all calculated using experimental data and RF modeling software. The motivation for these measurements was to determine if such a sapphire could be used as a dielectric lens to focus the magnetic field onto a sample wafer in a high field wafer test cavity. The measured properties have been used to finalize the design of the wafer test cavity. © 2012 American Institute of Physics.

author list (cited authors)

  • Pogue, N., McIntyre, P., Sattarov, A., & Reece, C.

publication date

  • January 1, 2012 11:11 AM


  • AIP  Publisher