A perpendicularly biased tuneable 2nd harmonic cavity is being constructed for use in the Fermilab Booster. The cavity's tuner uses National Magnetics AL800 garnet as the tuning media. For quality control, the magnetic properties of the material and the uniformity of the properties within the tuner must be assessed. We describe two tests which are performed on the rings and on their corresponding witness samples.
@article{arxiv.1806.05716,
title = {Garnet Ring Measurements For The Fermilab Booster 2nd Harmonic Cavity},
author = {J. Kuharik and J. Dey and K. Duel and R. Madrak and A. Makarov and W. Pellico and J. Reid and G. Romanov and M. Slabaugh and D. Sun and C. Y. Tan and I. Terechkine},
journal= {arXiv preprint arXiv:1806.05716},
year = {2018}
}