TMCI, why is the horizontal plane so different from the vertical one?

Authors

  • T. Günzel

DOI:

https://doi.org/10.23732/CYRCP-2020-009.378

Abstract

Based on the recent work of R. Lindberg on transverse collective instabilities it was observed that if the ratio of quadrupolar to dipolar impedance ρ is equal to -1 there is no TMC-instability. This relationship is actually fulfilled by resistive wall (RW)-impedance on the horizontal plane in case of a flat vacuum chamber. HEADTAIL simulations were carried out to check if this observation can be confirmed. Additionally the effect of radial modes on the TMC-instability was studied.

Published

2020-12-16