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Commissioning plans for 3.5 TeV

Commissioning plans for 3.5 TeV. Marco Zanetti CERN. Outline. Impact on main circuits test procedures Which energy for commissioning of IPQ/D and IT? Pros and contras of 3.5 vs 5 TeV Procedure for other circuits. RB. Only for 5 TeV. RQD/F. Only for 5 TeV. RB/RQ. PLI.3:

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Commissioning plans for 3.5 TeV

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  1. Commissioning plans for 3.5 TeV Marco Zanetti CERN

  2. Outline • Impact on main circuits test procedures • Which energy for commissioning of IPQ/D and IT? Pros and contras of 3.5 vs 5 TeV • Procedure for other circuits

  3. RB Only for 5 TeV

  4. RQD/F Only for 5 TeV

  5. RB/RQ • PLI.3: • I_INTERM_2 down to 6 kA (==3.54 TeV) • I_SM and I_SM_INT_n (PLI-s and first plateau of PLI.3): • Leave them as they are (I_SM=5kA, I_SM_INT_n=I_SM/5*n), or • Reduce I_SM to 4 kA and I_SM_INT_n accordingly • RB ending with heater-provoked quench and power failure • RQ ending with energy extraction from QPS • Not sizable gain on overall time (~1 shift per sector) Remark: commissioning for 5 TeV will require the re-qualification of the EE system (not enough to resume from PNO)

  6. IPQ/D and IT • Commissioning to 5 TeV: • No commissioning required when it will be decided to increase the energy. Overall gain in time (although small) • Electrical tests at 5 TeV current are more meaningful • All circuits were already commissioned to 7 TeV • No expected quenches below 5 TeV • Less parameters to be handled/memorised • No need to modify powering procedures • No change on sequencer and software in general • Commissioning to 3.5 TeV only: • possibly reduced risk (is there any risk at 5TeV?) • slightly less time for commissioning (insignificant) - however, this time might be lost due to the change of the procedures 

  7. Other circuits • No changes needed in the commissioning between 5 and 3.5 TeV

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