Speaker
Mr
Shahnam Gorgi Zadeh
(Universität Rostock)
Description
An $e^+e^-$ collider is foreseen in the design of future circular collider (FCC-ee) to make precise measurements of the properties of the Z, W, H bosons and the top quark ($\text{t}\bar{\text{t}}$). The two limiting cases from the SRF point of view are the Z operation which is characterized by low voltage and high beam current (1.39 A) and the $\text{t}\bar{\text{t}}$ operation which requires a high voltage of around 10.9 GV and has a relatively low beam current. In this presentation a single-cell cavity design is proposed for the Z-pole with the main focus on HOM-related aspects of the cavity. Moreover, a multi-cell cavity with minimal surface losses is designed for the W, H and $\text{t}\bar{\text{t}}$. A higher order mode damping scheme is proposed in each case to reduce the longitudinal and transverse impedance of the cavities below the impedance stability thresholds.
Primary author
Mr
Shahnam Gorgi Zadeh
(Universität Rostock)
Co-authors
Rama Calaga
(CERN)
Prof.
Ursula van Rienen
(University of Rostock)
