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TY - CONF AU - Park, G.-T. AU - Rimmer, R.A. AU - Wang, H. ED - Liu, Lin ED - Byrd, John M. ED - Neuenschwander, Regis T. ED - Picoreti, Renan ED - Schaa, Volker R. W. TI - The Relation Between Field Flatness and the Passband Frequency in the Elliptical Cavities J2 - Proc. of IPAC2021, Campinas, SP, Brazil, 24-28 May 2021 CY - Campinas, SP, Brazil T2 - International Particle Accelerator Conference T3 - 12 LA - english AB - A technique that predicts the field flatness of the operating pi-mode based on the passband frequency is highly desirable when the direct measurement of the field is not available. Such a technique was developed for the SNS-PPU cavity, a 6-cell SRF cavity whose field flatness is important for cold operation. In this paper, we will present the theory on the relations between field profile and passband frequencies of the arbitrary deformed cavities, the simulation studies, and comparison with the experimental measurements. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2636 EP - 2639 KW - cavity KW - SRF KW - simulation KW - gun KW - accelerating-gradient DA - 2021/08 PY - 2021 SN - 2673-5490 SN - 978-3-95450-214-1 DO - doi:10.18429/JACoW-IPAC2021-WEPAB020 UR - https://jacow.org/ipac2021/papers/wepab020.pdf ER -