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TY - CONF AU - Yamamoto, Y. AU - Michizono, S. ED - Michel, Peter ED - Arnold, André ED - Schaa, Volker RW TI - Ceramic Study on RF Windows for Power Coupler, Waveguide, and Klystron in Particle Accelerator J2 - Proc. of SRF2019, Dresden, Germany, 30 June-05 July 2019 CY - Dresden, Germany T2 - International Conference on RF Superconductivity T3 - 19 LA - english AB - R&Ds on different types of ceramic used in power coupler, waveguide, and klystron for particle accelerators are under progress in Center of Innovation (COI) at KEK, and at some outside companies. There are five important parameters on the properties of ceramics; that is, relative permittivity, dielectric loss tangent, surface and volume resistivity, and secondary electron emission coefficient. For measurements of these parameters, eight kinds of ceramic samples supplied from five vendors have been measured using three different measurement systems since 2017. In this report, the recent results for these studies will be presented in detail. PB - JACoW Publishing CP - Geneva, Switzerland SP - 255 EP - 259 KW - electron KW - GUI KW - klystron KW - operation KW - multipactoring DA - 2019/08 PY - 2019 SN - "" SN - 978-3-95450-211-0 DO - doi:10.18429/JACoW-SRF2019-MOP077 UR - http://jacow.org/srf2019/papers/mop077.pdf ER -