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175th HiLumi WP2 Meeting
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Europe/Zurich
6/R-012 - conference room (CERN)
Description
Join Zoom meeting room: HiLumi WP2 meeting
Other comments on Sofia's talk made after the meeting:
- Discussion with Hector on the distribution is ongoing. It was suggested to use a double Gaussian with σ2=2σ1 and I1/I2=65/35 but still to be discussed further if to use a q-Gaussian or a double Gaussian.
- Regarding the impact of the ADT on the high-frequency cluster but not on the low-frequency one, Sofia commented that this has to do with the fact that the high-f cluster has a large amplitude and it is “seen” and mitigated by the ADT, while the low-f cluster is lower than the ADT noise floor, which is <0.9 μm (number from M. Soderen paper Evian 2019 )→ We are able to observe these lines which are below the ADT noise floor because we combine multiple bunch information in the post-processing, the ADT is looking at the single bunch signal. To verify, possibly have a measurement of the amplitude of the high-f cluster when the ADT gain is further reduced or even switched off for a few minutes
- Gianluigi asked what is the impact on lifetime of higher telescopic factors at constant beta*. This is important for HL-LHC. Is the noise on the man power converter going to be a limitation?
Sofia replied that this can be checked. The main assumption is that the LHC noise spectrum will remain the same for HL-LHC (although this is not what we expect). Then the impact of changing the tele-index can be checked.
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