ATLAS-AFP interlock validation Sune Jakobsen (EP-UAT) on behalf of ATLAS-AFP 148th MPP 19-05-2017

AFP Interlock validation - outline Outline Injection Permits LVDT-to-limit comparison Reaction to flags LVDT-bypass box Buttons Conclusion Settings for 2017 AFP Interlock validation - outline Test of Injection Permits Test of response to the LVDT-to-limit comparison New in 2017 Test of USER_PERMIT and automatic extraction as a function of all input flags Test of the LVDT-bypass box Test of hardware and software buttons Conclusion of interlock tests Reminder of settings for 2017 ATLAS-AFP interlock validation 148th MPP 19-05-2017 Sune Jakobsen 2/12 2

AFP Interlock validation – Injection Permits Purpose: Check that the Injection Permit is removed if a Roman Pot is out of garage position. Test sequence: 1. All Roman Pots at HOME position. 2. Observe that the AFP inputs to the ATLAS injection permit are TRUE. 3. Move in the Roman Pot to be tested. 4. Observe that the AFP to the ATLAS injection input for the correct beam is FALSE. 5. Move the Roman Pot to be tested to HOME. 6. Observe that the AFP inputs to the ATLAS injection permit are TRUE. 1 3 5 4 ATLAS-AFP interlock validation 148th MPP 19-05-2017 Sune Jakobsen 3/12 3

AFP Interlock validation – Injection Permits result Test performed separately on each Roman Pot on 15-05-2017 (details in collimation logbook). All worked correctly. Summary table: ATLAS-AFP interlock validation 148th MPP 19-05-2017 Sune Jakobsen 4/12 4

AFP Interlock validation – LVDT-to-limit comparison Purpose: Check of the automatic extraction and loss of USER_PERMITs when a limit is violated. Test sequence: Not possible to move to illegal position, therefore: 1. Move in the Roman Pot to be tested. 2. Make position illegal by changing limit. 3. Observed automatic extraction and (not for WARNING) loss of USER PERMIT for the beam affected. 4. When extracted beyond the limit, observe the return of the USER PERMIT. 5. “Ringing” observed for several Roman Pots (not a problem for safety, but not nice for the log). 4 5 5 1 3 3 2 ATLAS-AFP interlock validation 148th MPP 19-05-2017 Sune Jakobsen 5/12 5

AFP Interlock validation – LVDT-to-limit comparison result Test performed separately on each Roman Pot on 15-05-2017 (details in collimation logbook). All worked correctly. Summary table: “Ringing” for the USER PERMIT observed for several Roman Pots ATLAS-AFP interlock validation 148th MPP 19-05-2017 Sune Jakobsen 6/12 6

AFP Interlock validation – Reaction to flags Purpose: Check of the reaction to SMP flags and the override key. Test sequence (simplified): 1. Cycle though STABLE_BEAM, UNSTABLE_BEAM and ADJUST and observed extraction and loss of USER PERMITs. 2. Observe correct behavior to LVDT-to-limit comparison in all relevant combinations. 3. Repeat with OVERRIDE in place. STABLE BEAM ADJUST ATLAS-AFP interlock validation 148th MPP 19-05-2017 Sune Jakobsen 7/12 7

AFP Interlock validation – Reaction to flags Test performed for one Roman Pot per beam on 15-05-2017 (details in collimation logbook). All worked correctly. Summary table on the right: “Ringing” for the USER PERMIT observed for several Roman Pots. ATLAS-AFP interlock validation 148th MPP 19-05-2017 Sune Jakobsen 8/12 8

AFP Interlock validation – LVDT-bypass box and results Purpose: Check that the LVDT-bypass box force the LVDT comparison TRUE while simultaneously disabling the motors. Fake situations (full definitions in EDMS note): TEST1: Failure with AFP Roman Pots inserted. Beam dump and then insure LHC operation without AFP Roman Pots. TEST2 (The forbidden use case): Problem with AFP Roman Pot inserted. Recovery without beam dump. TEST3 (Holiday mode): Insure LHC operation without AFP Roman Pots when manpower is not available to react fast. TEST4: Failure with AFP Roman Pots in garage. Beam dump and then insure LHC operation without AFP Roman Pots Test performed for one Roman Pot per beam on 15-05-2017 (details in collimation logbook). Result: All worked correctly. PXI OFF PXI OFF ATLAS-AFP interlock validation 148th MPP 19-05-2017 Sune Jakobsen 9/12 9

ATLAS SLIMOS hardware panel AFP Interlock validation – Test of buttons Purpose: Check functionality of hardware and software buttons. ATLAS SLIMOS hardware panel Tests: Hardware emergency extract: Hardware disable of power to all motors => Extraction (no change in USER PERMITs). Software extract per Roman Pot: Extraction via DCS command to PXI (no change in USER PERMITs). Test performed for one Roman Pot per beam on 15-05-2017 (details in collimation logbook). Result: All worked correctly. ATLAS-AFP interlock validation 148th MPP 19-05-2017 Sune Jakobsen 10/12 10

AFP Interlock validation – Conclusion Full serious of all the test originally performed for TOTEM and ALFA has now also been performed for the final AFP movement and interlock systems. All is working correctly. Some “ringing observed” on the USER PERMITs, but has no influence on safety aspects. EDMS note in preparation: 1808750 Does the signature list need updating? ATLAS-AFP interlock validation 148th MPP 19-05-2017 Sune Jakobsen 11/12 11

Reminder for setting for 2017 Previously agreed settings: General Roman Pot setting: TCT + 3 σnominal + 0.3 mm = 12 σnominal + 0.3 mm Minimum 1.5 mm (not relevant for AFP). Extra margin for new system for startup phase: TCT + 3 σnominal + 0.3 mm + 0.5 mm = 12 σnominal + 0.8 mm Settings for AFP in startup phase: Ultimate settings for AFP: AFP suggests to move to the ultimate settings in the middle of the summer (e.g. after MD2). Important to make the change to the ultimate settings no later than in TS2. Suggested margin to WARNING LIMIT: 0.2 mm. Suggested margin to DUMP LIMITs: 0.3 mm. ATLAS-AFP interlock validation 148th MPP 19-05-2017 Sune Jakobsen 12/12 12