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Wednesday

Wednesday. 08h00: PS back. Injection and setup with beam . 09h00 : LBDS Test. Injection protection check . Switching off LBDS for beam 1. Correct dump. Switching off LBDS for beam 2. Correct dump. System dumped by the LBDS slow control via the BIS loop.

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Wednesday

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  1. Wednesday • 08h00: PS back. Injection and setup with beam. • 09h00: LBDS Test. Injection protection check. • Switching off LBDS for beam 1. Correct dump. • Switching off LBDS for beam 2. Correct dump. • System dumped by the LBDS slow control via the BIS loop. • Checking TDI for beam 1: Sensor calibration seems OK. • 10h00: Check of new MQW functions with beam (during PS intervention). • Tunes went off and most of beam lost. • Not usable for ramp and beta beat measurements. LHC planning

  2. LBDS OFF test: Beam 1 LHC planning

  3. TDI test: Sensor readings at full gap LHC planning

  4. Wednesday • 13h30: RF synchronization test for LBDS. Collimation ramp without beam. • Both channels are properly connected: trims on B1 were properly recorded on LBDS for B1 and the same for B2. We had nevertheless to trim by 1 kHz to see any change. • Collimators ramped OK. No interlock. • 16h00: Beam setup at injection. • 17h00: Ramp with collimators closing and orbit feedback. Ramp down and cycle. • Beam 2 heavily jumping (“dancing beam”). Orbit feedback driving orbit correctors. • Beam 2 dumped due to beam position interlock. • Beam 1 up without losses and with closing collimators (primary collimators staying at 6 sigma. • No collimator interlocks. Position + gap thresholds around closing jaw positions. LHC planning

  5. Collimator Ramp Test w/o Beam LHC planning

  6. Collimator Ramp Test w/o Beam: TCDQ LHC planning

  7. Ramp with Collimators & Orbit Feedback LHC planning

  8. Ramp with Collimators & Orbit Feedback LHC planning

  9. Ramp with Collimators & Orbit Feedback LHC planning

  10. Ramp with Collimators & Orbit Feedback LHC planning

  11. Ramp with Collimators & Orbit Feedback Parasitic beta beat measurement (R. Steinhagen) LHC planning

  12. Wednesday • 21h00: Beam setup at injection. • 01h40: Start of ramp for beta beat studies. • Beam 1 dumped due to new energy-dependent gap threshold on four primary collimators. • Collimators saw energy ramping and ran out of allowed gap. Involuntary MPS test. • Not foreseen to change between two setups rapidly. Forgotten thresholds. • 02h47: Beam dump 3.5 TeV. Ramp down and cycle. • 05h47: Start of ramp for beta beat studies. • 07h20: Start of RF studies at 3.5 TeV. LHC planning

  13. Ramps for beta beat LHC planning

  14. Ramps for beta beat LHC planning

  15. Ramps for beta beat LHC planning

  16. Ramps for beta beat: B1 LHC planning

  17. Ramps for beta beat: B1 LHC planning

  18. Ramps for beta beat: B2 LHC planning

  19. Ramps for beta beat: B2 LHC planning

  20. Ahead LHC planning

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