148 th MPP 19052017 Sune Jakobsen EPUAT on behalf of ATLASAFP AFP Interlock validation outline Sune Jakobsen ATLASAFP interlock validation 148 ID: 796490
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Slide1
ATLAS-AFP interlock validation
148
th
MPP 19-05-2017
Sune Jakobsen
(EP-UAT
) on behalf of ATLAS-AFP
Slide2AFP Interlock validation - outline
Sune Jakobsen
ATLAS-AFP interlock validation
148
th
MPP
19-05-2017
Test of USER_PERMIT and automatic extraction as a function of all input flags
Test of the LVDT-bypass box
2
/12
Test of hardware and software buttons
Test of Injection Permits
Conclusion of interlock tests
Test of response to the LVDT-to-limit comparison
Reminder of settings for 2017
New in 2017
Outline Injection Permits LVDT-to-limit comparison Reaction to flags LVDT-bypass box Buttons Conclusion Settings for 2017
Slide3AFP Interlock validation – Injection Permits
Sune Jakobsen
ATLAS-AFP interlock validation 148
th
MPP 19-05-2017
1. All Roman Pots at HOME position.
2.
Observe
that the AFP inputs to the ATLAS injection permit are TRUE.
3/12
3. Move in the Roman Pot to be tested.
Purpose: Check that the Injection Permit is removed if a Roman Pot is out of garage position.
4. Observe that
the AFP to the ATLAS injection
input for the correct beam is FALSE.
Test sequence:
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
4
5
Slide4AFP Interlock validation – Injection Permits result
Sune Jakobsen
ATLAS-AFP interlock validation 148
th
MPP 19-05-2017
4/12
Test performed separately on each Roman Pot on 15-05-2017 (details in collimation logbook).
All worked correctly.
Summary table:
Slide5AFP Interlock validation – LVDT-to-limit comparison
Sune Jakobsen
ATLAS-AFP interlock validation 148
th
MPP 19-05-2017
Not possible to move to illegal position, therefore:
1. Move
in the Roman Pot to be tested.
5/12
2. Make position illegal by changing limit.
Purpose: Check of the automatic extraction and loss of USER_PERMITs when a limit is violated.
3. Observed automatic extraction and (not for WARNING) loss of USER PERMIT for the beam affected.
Test sequence:
4. When extracted beyond the limit, observe the return of the USER PERMIT.
1
2
3
4
3
5. “Ringing” observed for several Roman Pots (not a problem for safety, but not nice for the log).
5
5
Slide6AFP Interlock validation – LVDT-to-limit comparison result
Sune Jakobsen
ATLAS-AFP interlock validation 148
th
MPP 19-05-2017
6/12
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
Slide7AFP Interlock validation – Reaction to flags
Sune Jakobsen
ATLAS-AFP interlock validation 148
th
MPP 19-05-2017
1. Cycle though STABLE_BEAM, UNSTABLE_BEAM and ADJUST and observed extraction and loss of USER PERMITs.
7/12
2.
Observe correct behavior to LVDT-to-limit comparison in all relevant combinations.
Purpose: Check of the reaction to SMP flags and the override key.
3.
Repeat with OVERRIDE in place.
Test sequence (simplified):
STABLE BEAM
ADJUST
Slide8AFP Interlock validation – Reaction to flags
Sune Jakobsen
ATLAS-AFP interlock validation 148
th
MPP 19-05-2017
8/12
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.
Slide9AFP Interlock validation – LVDT-bypass box and results
Sune Jakobsen
ATLAS-AFP interlock validation 148
th
MPP 19-05-2017
TEST1: Failure with AFP Roman Pots inserted.
Beam dump and then insure LHC operation without AFP Roman Pots.
9/12
TEST2 (The forbidden use case): Problem with AFP Roman Pot inserted. Recovery without beam dump.
Purpose: Check that the LVDT-bypass box force the LVDT comparison TRUE while simultaneously disabling the motors.
TEST3 (Holiday mode): Insure LHC operation without AFP Roman Pots when manpower is not available to react fast.
Fake situations (full definitions in EDMS note):
PXI OFF
TEST4: Failure with AFP Roman Pots in garage.
Beam dump and then insure LHC operation without AFP Roman Pots
PXI OFF
Result: All worked correctly.
Test performed for one Roman Pot per beam on 15-05-2017 (details in collimation logbook).
Slide10AFP Interlock validation – Test of buttons
Sune Jakobsen
ATLAS-AFP interlock validation 148
th
MPP 19-05-2017
Hardware emergency extract: Hardware disable of power to all motors => Extraction (no change in USER PERMITs).
10/12
Software extract per Roman Pot: Extraction via DCS command to PXI (no change in USER PERMITs).
Purpose: Check functionality of hardware and software buttons.
Tests:
ATLAS SLIMOS hardware panel
Result: All worked correctly.
Test performed for one Roman Pot per beam on 15-05-2017 (details in collimation logbook).
Slide11AFP Interlock validation – Conclusion
Sune Jakobsen
ATLAS-AFP interlock validation 148
th
MPP 19-05-2017
11/12
Some “ringing observed” on the USER PERMITs, but has no influence on safety aspects.
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.
Does the signature list need updating?
EDMS note
in preparation: 1808750
Slide12Reminder for setting for 2017
Sune Jakobsen
ATLAS-AFP interlock validation 148
th
MPP 19-05-2017
12
/12
Extra margin for new system for startup phase:
TCT + 3
σ
nominal
+ 0.3
mm + 0.5 mm
= 12
σ
nominal
+
0.8 mm
Previously agreed settings:
General Roman Pot setting: TCT + 3
σnominal + 0.3 mm = 12 σ
nominal + 0.3 mm
Settings for AFP in startup phase:
Minimum 1.5 mm (not relevant for AFP).
Ultimate settings for AFP:
Suggested margin to WARNING LIMIT: 0.2 mm.
Suggested margin to DUMP LIMITs: 0.3 mm.
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.