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TOTEM Interlock Revalidation

TOTEM Interlock Revalidation. Mario Deile MPP Meeting 19 June 2015. Movement System Architecture (strongly simplified). Collimator Control Application in CCC (adapted to RPs). DCS. Interlock Rack. General Machine Timing. request position, set limits. read position, give feedback.

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TOTEM Interlock Revalidation

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  1. TOTEM Interlock Revalidation Mario Deile MPP Meeting 19 June 2015 Mario Deile –

  2. Movement System Architecture (strongly simplified) Collimator Control Application in CCC (adapted to RPs) DCS Interlock Rack General Machine Timing request position, set limits read position, give feedback RP Extraction Info GMT FESA Server SMP flags (e.g. beam mode) Interlock Box LVDT Bypass Box PXI1 PXI2 USER_PERMIT INJECTION_PERMIT FPGA FPGA CIBU Beam user interlock control Motor Control LVDT BIC LHC Beam Interlock controller 26 Roman Pots Motor Control Rack Mario Deile –

  3. Revalidation • Based on previous validation note https://edms.cern.ch/document/1501228 : • Beam-mode dependent tests not redone (They concern the logic in the hardware “interlock box”; not touched) • Retested: - Correct transmission of all position limits to the interlock PXI and read-back to the CCC collimator application - Correct system reaction to violations of the limits (RP retraction for violation of warning limits, RP retraction + dump for violation of dump limits) Done for all 26 RPs and for all inner limits: - old inner warning - old inner dump - new inner dump Outer limits: no operational meaning  tested transmission for all pots, retraction and dump for a subset of pots • Test of the automated operational sequence (reset, set limits, drive pots) Mario Deile –

  4. Illustration All documentation in collimation logbook: https://www.cern.ch/ab-dep-op-elogbook/elogbook/secure/eLogbook.php?shiftId=1065515 https://www.cern.ch/ab-dep-op-elogbook/elogbook/secure/eLogbook.php?shiftId=1065549 https://www.cern.ch/ab-dep-op-elogbook/elogbook/secure/eLogbook.php?shiftId=1065583 LVDT IPL=“new inner limit” Mario Deile –

  5. Illustration (2) warning (extraction) with Bottom pot dump with Top pot Mario Deile –

  6. Summary of Test Results • No PXI crash since the fix (Thursday 11 June, evening) • No non-conformities in interlock functionality observed • Remaining operational annoyances: - execution of motor resets by sequence still leads sometimes to time-out in receiving the PXI acknowledgement, but command always correctly executed - same problem for new inner limits Mario Deile –

  7. RP Interlock Logic 2015 Interlock Logic 2015 Mario Deile –

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