1. R2E Availability October 15 th 2014 Experience from Past LHC and Injector Operation and scaling to the future G. Spiezia

2. R2E Availability October 15 th 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

3. R2E Availability October 15 th 2014 Failures 2012 Dump ConfirmedDump TBCNo DumpNo Dump TBC 5810367 Destructive failures Dump ConfirmedDump TBCNo DumpNo Dump TBC 17140

4. R2E Availability October 15 th 2014 What was done and what remains  Previous LS1  Immediate relocation  Shielding (2011)  LS1  Main impacted systems – observed failure signatures:  Equipment Upgrades and new developments  Relocation (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

5. R2E Availability October 15 th 2014 SEE Failure analysis Without giving numbers it is clear that the there is little margin on the budget for radiation failures ~250 h Downtime ~400 h Downtime LS1 – LS2 Aiming for <0.5 dumps / fb -1 ~12 dumps / fb -1 ~3 dumps / fb -1 HL-LHC: < 0.1 dumps / fb -1 Relocation & Shielding Equipment Upgrades Mitigation Prevention Rad-tol design No unqualified equipment in exposed areas

6. R2E Availability October 15 th 2014 Equipment overview (LHC and Injectors) A&T QPS Power Converter Cryogenic Interlock systems Radiation Monitor &Testing Beam Instruments RF Kicker magnet Control Equip SurveyVacuum CV IT tools Safety and Alarms Light system 100 Gy – 10 kGy 10 11 10 13 HEH/cm 2 100-1000 subsystems for each equipment 100 Gy – 10 kGy 10 11 10 13 HEH/cm 2 100-1000 subsystems for each equipment LHC & PSB,PS, SPS LHC

7. R2E Availability October 15 th 2014 Equipment overview (LHC and Injectors) A&T QPS Power Converter Cryogenic Interlock systems Radiation Monitor &Testing Beam Instruments RF Kicker magnet Control Equip SurveyVacuum CV IT tools Safety and Alarms Light system LHC & PSB,PS, SPS LHC SEE

8. R2E Availability October 15 th 2014 Equipment overview (LHC and Injectors) A&T QPS Power Converter Cryogenic Interlock systems Radiation Monitor &Testing Beam Instruments RF Kicker magnet Control Equip SurveyVacuum CV IT tools Safety and Alarms Light system LHC & PSB,PS, SPS LHC Cumulative effects 70 Gy

9. R2E Availability October 15 th 2014 Equipment overview (LHC and Injectors) A&T QPS Power Converter Cryogenic Interlock systems Radiation Monitor &Testing Beam Instruments RF Kicker magnet Control Equip SurveyVacuum CV IT tools Safety and Alarms Light system LHC & PSB,PS, SPS LHC Cumulative effects

10. R2E Availability October 15 th 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

11. R2E Availability October 15 th 2014 Examples to clarify TID effect and prevention Acquisition 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

12. R2E Availability October 15 th 2014 Recipe for Prevention/Availability Availability Rad Tol development Monitor Calibration Radiation levels Failures Test Facilities Instruments

13. R2E Availability October 15 th 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 testssummary table Twiki

14. R2E Availability October 15 th 2014 Monitor (done and needed)  Follow up and tracking of the equipment failures  Radiation levels reports on a weekly basis  New RadMon version

15. R2E Availability October 15 th 2014 Rad Tolerant Developments  FGC Lite development  Power Converter development  QPS equipment upgrade  Cryogenic update for the heater  And others (see talks Session2)

16. R2E Availability October 15 th 2014 Rad Tolerant Developments  Why not evaluating common needs for qualifying rad-hard devices? Today

17. R2E Availability October 15 th 2014 Rad Tolerant Developments  Why not evaluating common needs for qualifying rad-hard devices? Tomorrow ?

18. R2E Availability October 15 th 2014 Structure

19. R2E Availability October 15 th 2014 Conclusion  Past  Errors identified and mostly corrected  Direct impact on the beam dump mitigated  Today  Budget for failure rate is low  After LS1 effort Equipment availability is good  Effort 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)