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Powreing Test Sector 7-8 - Report 06/06/07

Test Report Wednesday 06/06/2007

• RQ4.L8
  • Manual Squeezing test (PSQ). Test OK. (The test will be considered as fully passed only once automatic function is used)
  • When Squeezing was finished, the magnet was ramped to nominal current (3610 A) and kept there for "endurance test"; after one hour, the B2 converter tripped and a FPA was initiated: analysis of the PM signals was indicating an external interlock alarm - red emergency button pressed. Nobody was in the area at that moment.
  • The two converters were ramped back to nominal and kept there; after three hours, the same trip as before was experienced on B2 and the FPA initiated. The circuit was blocked for powering.
  • Further investigations showed that the two trips were provoked by a mispositioned pin in the connector on the emergency red button. Already fixed by PO.

• RQ6.R7B1 and RQ6.R7B2
  • PCC completed by PO and QPS in the tunnel of point 7.
  • PIC2 CRYO-OK passed on RQ6.R7B1, RQ6.R7B2, RCBH6.R7B2 and RCBV6.R7B1.
  • Remaining steps of PIC2 passed on RCBH6.R7B2. Not possible to continue with the others due to a communication problem with QPS detectors; a manual reset in UA83 is needed.

Planning for Thursday 07/06/2007

• RQ6.R7B1 and RQ6.R7B2
  • Complete PIC2 on the two 600 A circuits and the corrector RCBV6.R7B1
  • PCS.1, PCS.2, PCS.3, PCS.4 (Ramp rate 0.2-0.5 A/s)

• 600 A correctors
  • Cable connection on the circuits released by ElQA (after verification by PO of the condemnation of those converters)

• 80 A correctors of Q4 and Q5: "Endurance test" after Reiner's intervention

• ElQA tests:
  • Further investigations on RB circuit/instrumentation

• ML8: once D2 is available, special cycle with D2, Q4 and Q5.

• Powering of RQ4.L8 and RQ5.L8 to validate the FGC software update

• Boil-off tests on DFBAN in the morning.