München 2019 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 1: Particle Sources and Radiofrequency 1
AKBP 1.7: Vortrag
Montag, 18. März 2019, 15:30–15:45, HS 8
Estimation of the Critical RF Fields on a SRF Cavity Flange Transition — •Jonas Christian Wolff1, 2, Jens Iversen1, Daniel Klinke1, Denis Kostin1, Detlef Reschke1, Sven Thorsten Sievers1, Alexey Sulimov1, Jan-Hendrik Thie1, Ralf Wendel2, and Mateusz Wiencek1 — 1DESY, Notkestraße 85, 22607 Hamburg, Germany — 2Hochschule für Angewandte Wissenschaften Hamburg, Berliner Tor 7, 20099 Hamburg, Germany
To minimize the distance between the flange contact and the iris of a superconducting radio frequency (SRF) cavity, it is required to know the critical value for the RF fields. This allows us to prevent a potential early quench at its flange contact area (transition). To avoid changes on the SRF cavity used for the tests, all RF cryogenic experiments will be carried out by using a cylinder in the center of a 1-cell cavity drift tube to increase the field density at its flange contact. This cylinder was designed and optimized by CST Microwave Studio simulations for the use of a test cavity with a comparatively low gradient to avoid field restrictions by the cavity. The ongoing work investigates the distance limitation for commonly used flanges at 1.3 GHz TESLA-Shape SRF cavities, originally designed for low field areas. Due to the high losses at the non superconducting seal a relatively low value can be expected to be critical. For this reason approaches to increase the critical RF fields will be investigated during the further process.