TMCI, why is the horizontal plane so different from the vertical one?
DOI:
https://doi.org/10.23732/CYRCP-2020-009.378Abstract
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.
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2020-12-16
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