9th meeting on HEMAC discussions

Tuesday 6 Sept 2022, 16:45 → 17:30 Europe/Zurich

Zoom

https://cern.zoom.us/j/67424567340?pwd=NnVMdWh2SGZZdWdrMEs1N0lGR0dEQT09

16:45 → 16:55 Stability thresholds of first RCS stage for resonator wakefield

Speaker: Dr David Amorim (CERN)

2022-09-06_HEMAC_RCS1_impedance_resonator_scan_v2.pdf

16:55 → 17:05 How many RF stations do we need in the RCS chain?

Speaker: Fabian Batsch (CERN)

MC_HEMAC_FB_220906.pdf

17:05 → 17:20 Discussion

Few open points for follow-up:
- Optimize losses in RCS chain for best overall performance, allowing different transmission in the two or three machines
- Would two RCS be sufficient to accelerate from 60 GeV to 1.5 TeV?
- Cost functions per machine part: could one make an assumption for a cost per unit length of RF (plus some infrastructure cost offset per RF section), idem for unit length of magnets?
- Average gradient of RF sections: 30 MV/m
- Resistive wall impedance?
- Is transition gamma of ~20 a good number for the first RCS stage?
- FFA alternative for RCS?

17:20 → 17:30 Round table

Speakers: Alexej Grudiev (CERN), Antoine Chance (CEA Irfu), David Amorim (CERN), Elias Metral (CERN), Fabian Batsch (CERN), Heiko Damerau (CERN), Ivan Karpov (CERN)