Participants: Cedric, Luisa, Roderik, Natalia, Belen, Anton, Sara

Anton:

• 18 BLM dumps in 2023 ion run
  • 9 in ramp, 9 at top energy
  • 7 on Q6R7
  • 4 on TCLD
  • 4 on TCTs -> 2 on H.4L1 and 2 on V.4L2
  • 10Hz losses should be mitigated this year
• 2.7e8 ions per bunch in SPS -> 50% more compared to 2023
• TCLDs
  • BFPP ions 
  • Losses on TCLDs due to IP7 should be better this year... but we cannot fully exclude it
  • Limit set for power loss of more than 500kW in long RS (RS07-12)
  • For RS06, and MF = 0.35 in 2023, estimated power impact is 1.5-3kW, estimated power deposition around 0.8-1.5kW
    • Energy deposition of 8-15J in 10ms
  • Could we increase only RS06 for 10Hz losses?

• TCTs
  • Warnings towards the end of the ramp due to slow losses
  • 10Hz events triggering dumps
  • All dumps were 10hz events
  • Three dumps in ramp, one in FT
  • Flat threshold profile for RS08-RS12 
  • Increased in intermediate energies for RS07 for fast losses
  • Estimated power deposition in jaw 350W
    • Depends on loss scenario and BLM response (position of BLMs not the same for all TCTs)

• Proposals:
  • Increase an increase of thresholds in intermediate and longer RS

• Simulations of impacts scenarios on vertical TCTPV
  • Case 1: halo leakage of ions from IR7 to TCTPV
  • Case 2: accidental impacts of Pb ions on TCTPV (scraping scenario)
    • Lower impact parameter
  • For 2kW power deposited, power density simulated, much higher in the scraping scenario
  • Do we want to interlock based on the halo scenario or the scraping scenario?

Luisa:

• Simulated case 1.a) before discussions on approach
• Deposited power of 3kW on 1 jaw input for simulations
• Steps from 0.1s to 20s
  • Other steps needed below?
  • 3kW 20 s for 1b and 2
  • Check also faster losses, 0.01 s (10ms) to check for 10Hz losses
    
• For 20 s:
  • 75 degrees in the jaw
  • Directional deformation
  • Eq. stress
• Table with different power deposition and time of impact
  • Close to the threshold for stress in the pipes only in the case of 15kW for 20s
  • 267 degrees also high 
    • Elastic deformation could change cleaning efficiency

Natalia:

• 2023 ion loss maps in CH, VR, AM
• Allowed power loss for the three orientations?
• Volume reflection higher BLM response in TCLA upstream Q6 for B1H
  • Include Q6 BLMs in analysis
• B1H loss map used for 2023 calibration had worse IR7 DS inefficiency?
• Allow 60kW for channeling, 15kW for amorphous and 15kW for VR?
• Double-check the factors that were applied as corrections on the ECR