5. Annual MT Meeting

Estimation of the Critical RF Fields on a SRF Cavity Flange Transition

Not scheduled

20m

various rooms, please see programme (Helmholtz Institute Jena)

Poster ARD

Speaker

Mr Jonas Christian Wolff (DESY)

Description

To optimize the length of the drift tube of a superconducting radio frequency (SRF) cavity, it is required to know the critical value of the RF fields. This prevents a potential early quench at the flange contact area (transition) in case of a drift tube length reduction. 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 the 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 field limitations of 1.3 GHz TESLA-Shape SRF cavity flanges, originally designed for low field areas. Due to the high losses at the normal conducting 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.