Name: 9th meeting on HEMAC discussions
Start: 2022-09-06T16:45:00+02:00
End: 2022-09-06T17:30:00+02:00
Location: Zoom

- 1
  
  Stability thresholds of first RCS stage for resonator wakefield
  
  Speaker: Dr David Amorim (CERN)
  
  2022-09-06_HEMAC_RCS1_impedance_resonator_scan_v2.pdf
- 2
  
  How many RF stations do we need in the RCS chain?
  
  Speaker: Fabian Batsch (CERN)
  
  MC_HEMAC_FB_220906.pdf
- 3
  
  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?
- 4
  
  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)