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TY - CONF AU - Kuharik, J. AU - Madrak, R.L. AU - Makarov, A.V. AU - Pellico, W. AU - Sun, D. AU - Tan, C.-Y. AU - Terechkine, I. ED - Schaa, Volker RW ED - Arduini, Gianluigi ED - Pranke, Juliana ED - Seidel, Mike ED - Lindroos, Mats TI - Static Magnetization Properties of AL800 Garnet Material J2 - Proc. of IPAC2017, Copenhagen, Denmark, 14â19 May, 2017 C1 - Copenhagen, Denmark T2 - International Particle Accelerator Conference T3 - 8 LA - english AB - A second harmonic tunable RF cavity is being developed for the Fermilab Booster. This device, which promises reduction of the particle beam loss at the injection, transition, and extraction stages, employs perpendicularly biased garnet material for the frequency tuning. The required range of the tuning is significantly wider than in previously built and tested tunable RF devices. As a result, the magnetic field in the garnet becomes fairly close to the gyromagnetic resonance line at the lower end of the frequency range. The chosen design concept of a tuner for the cavity cannot ensure uniform magnetic field in the garnet material; thus it is important to know the static magnetic properties of the material to avoid significant increase in the local RF loss power density. This report summarizes studies performed at Fermilab to understand variations in the magnetic properties of the AL-800 garnet material used to build the tuner of the cavity. PB - JACoW CP - Geneva, Switzerland SP - 4370 EP - 4373 KW - cavity KW - booster KW - injection KW - extraction KW - power-supply DA - 2017/05 PY - 2017 SN - 978-3-95450-182-3 DO - 10.18429/JACoW-IPAC2017-THPIK116 UR - http://jacow.org/ipac2017/papers/thpik116.pdf ER -