r2e availability october 15 th 2014 experience from past lhc and injector operation and scaling to...
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R2E Availability October 15th 2014
Experience from Past LHC and Injector Operation and scaling to the future
G. Spiezia
R2E Availability October 15th 2014
Outline Recall of Run-1
What changes after LS1
Equipment and radiation impact to be expected for after LS1
How to face the challenge
Conclusion
R2E Availability October 15th 2014
Failures 2012
Dump Confirmed Dump TBC No Dump No Dump TBC58 10 36 7
Destructive failuresDump Confirmed Dump TBC No Dump No Dump TBC
17 1 4 0
R2E Availability October 15th 2014
What was done and what remains Previous LS1
Immediate relocation Shielding (2011)
LS1 Main impacted systems – observed failure signatures:
Equipment Upgrades and new developmentsRelocation (UJs, US85, UX45)Shielding (RRs)
Conditions after LS1 DS/ARC will be more and more loaded Long-term damage to be considered in cells 8-13 Impact of 25ns operation to be evaluated Future upgrades/changes/new installations to be evaluated Continuous check of the ‘safe areas’, e.g. RE
R2E Availability October 15th 2014
SEE Failure analysis
Without giving numbers it is clear that the there is little margin on the budget for radiation failures
~250 hDowntime
~400 hDowntime
LS1 – LS2 Aiming for
<0.5 dumps / fb-1
~12
dum
ps /
fb-1
~3 d
umps
/ fb
-1
HL-LHC: < 0.1 dumps / fb-1
Relocation& Shielding
Equipment Upgrades
Mitigation
Prevention
Rad-tol design
No unqualified equipment in exposed areas
R2E Availability October 15th 2014
Equipment overview (LHC and Injectors)
A&T
QPSPower
Converter
Cryogenic
Interlock systems
Radiation Monitor &Testing
Beam Instruments
RF
Kicker magnet
Control Equip
Survey
Vacuum
CV
IT tools
Safety and Alarms
Light system
100 Gy – 10 kGy1011 1013 HEH/cm2
100-1000 subsystems for each equipment
LHC&PSB,PS, SPS
LHC
R2E Availability October 15th 2014
Equipment overview (LHC and Injectors)
A&T
QPSPower
Converter
Cryogenic
Interlock systems
Radiation Monitor &Testing
Beam Instruments
RF
Kicker magnet
Control Equip
Survey
Vacuum
CV
IT tools
Safety and Alarms
Light system
LHC&PSB,PS, SPS
LHC SEE
R2E Availability October 15th 2014
Equipment overview (LHC and Injectors)
A&T
QPSPower
Converter
Cryogenic
Interlock systems
Radiation Monitor &Testing
Beam Instruments
RF
Kicker magnet
Control Equip
Survey
Vacuum
CV
IT tools
Safety and Alarms
Light system
LHC&PSB,PS, SPS
LHC Cumulative effects
70 Gy
R2E Availability October 15th 2014
Equipment overview (LHC and Injectors)
A&T
QPSPower
Converter
Cryogenic
Interlock systems
Radiation Monitor &Testing
Beam Instruments
RF
Kicker magnet
Control Equip
Survey
Vacuum
CV
IT tools
Safety and Alarms
Light system
LHC&PSB,PS, SPS
LHC Cumulative effects
R2E Availability October 15th 2014
Examples to clarify SEE and prevention LHC: few thousand electronic units exposed Aim: less than one radiation induced failure per operational week
Reliability in FIT: aiming for few hundred FITs/SYSTEM!
Example of System
© R. Baumann
LHC case: REALLY CARE
R2E Availability October 15th 2014
Examples to clarify TID effect and preventionAcquisition system example Repeated N times in the ring
Failure at 70 Gy
Multiplexer behaviour
month1 2 3 4 5 6 7
Sample to sample variation is limited for TID
N acquisition systems in error between month 4 and 5
TID (Gy)15 30 45 60 75 90
R2E Availability October 15th 2014
Recipe for Prevention/Availability
Availability
Rad Tol development
Monitor• Calibration• Radiation levels• Failures
Test• Facilities• Instruments
R2E Availability October 15th 2014
Test (done and needed) A&Ts electronic designs based predominantly
on COTS 2011-2014:almost 100 components
tested/qualified Special agreements & Blanket Contracts
with facilities “Prime-Time” at PSI “Main customer” of Fraunhofer
In house facilities Co60 source (with RP) CHARM
Radiation test team of EN/STI working together with all equipment groups Coordinated through the RadWG Available Data: See summary table of
RadWG test campaigns, Twiki for all Fraunhofer related tests
R2E Availability October 15th 2014
Monitor (done and needed)
Follow up and tracking of the equipment failures
Radiation levels reports on a weekly basis
New RadMon version
R2E Availability October 15th 2014
Rad Tolerant Developments FGC Lite development
Power Converter development
QPS equipment upgrade
Cryogenic update for the heater
And others (see talks Session2)
R2E Availability October 15th 2014
Rad Tolerant DevelopmentsWhy not evaluating common needs for qualifying rad-hard
devices?
Today
R2E Availability October 15th 2014
Rad Tolerant DevelopmentsWhy not evaluating common needs for qualifying rad-hard
devices?Tomorrow ?
R2E Availability October 15th 2014
Structure
R2E Availability October 15th 2014
Conclusion Past
Errors identified and mostly correctedDirect impact on the beam dump mitigated
TodayBudget for failure rate is lowAfter LS1 effort Equipment availability is goodEffort to move from mitigation to prevention
Run2 and next SEE and cumulative effects (TID+DD)Keep doing what was done so far ….
Test, monitor, continue rad tolerant developments Individuate the common requirements to share effort
(cost/time/manpower)
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