Presentation is loading. Please wait.

Presentation is loading. Please wait.

R2E Mitigation Project – Status & Outlook July 15 th 2011 (R2E) Mitigation Project: www.cern.ch/r2e Mini-Chamonix, July 15 th 2011 Radiation To Electronics.

Similar presentations


Presentation on theme: "R2E Mitigation Project – Status & Outlook July 15 th 2011 (R2E) Mitigation Project: www.cern.ch/r2e Mini-Chamonix, July 15 th 2011 Radiation To Electronics."— Presentation transcript:

1 R2E Mitigation Project – Status & Outlook July 15 th 2011 (R2E) Mitigation Project: Mini-Chamonix, July 15 th 2011 Radiation To Electronics Status & Outlook Radiation To Electronics Status & Outlook M. Brugger on behalf of the R2E Project !!! Many Thanks To Everybody !!! Snapshot

2 R2E Mitigation Project – Status & Outlook July 15 th 2011 Overview Radiation Levels & Evolution Observed Equipment Failures 2011/2012 To-Dos XmasBreak & Patch-Solutions Mitigation Plan & Strategy 2

3 R2E Mitigation Project – Status & Outlook July 15 th 2011 Measured & Expected Rad-Levels 3 Weekly ReportDetailed Analysis Link1 Link1 & Link2Link2 Comparison & Extrapolation x50

4 R2E Mitigation Project – Status & Outlook July 15 th Operation up to Week 25 (2010 excluded): -> 1fb-1 (nominal: x50 for lumi scaling) Scaling might be non-linear for areas being dominated by direct losses (& distributions) Luminosity Dominant OLD ESTIMATE Measured & Expected Rad-Levels

5 R2E Mitigation Project – Status & Outlook July 15 th 2011 Performed R2E Mitigation Actions Shielding: P6 (RA63/UA63 and RA67/UA67) (gain ~factor 5-10) UJ22/23/76/88/87 (gain ~factor 10) RR77/73 (gain ~factor 10) US85 Safe-Room (gain ~factor 10) Relocations: Fire-Control Racks UJ56/76, US85 (safe) RTU relocated from safe room in UJ56/76 (safe) Cryo-relocations/valve replacement in UX85 (safe) UPS from UJ76 (safe) Fire-Detectors: US85, other points prepared (safe) Preparations: Cabling preparations and Rack Installations: P1, P7, P8 5

6 R2E Mitigation Project – Status & Outlook July 15 th 2011 Radiation Levels: Follow-Ups! UX45: Increase of radiation levels in UX45 12 RadMon counts so far REs: Increase of radiation levels 18 RadMon counts so far ARCs: Increase of radiation levels very low radiation so far (<1mGy/week) nominal (expected): few Gy per year How much will residual gas densities go up? How to scale to nominal operation?

7 R2E Mitigation Project – Status & Outlook July 15 th 2011 Equipment Failures Sources of Information eLogBook 8:30h meetings RadWG list (see link)link Cryogenics List (see link)link QPS analysis/list (see intermediate summary)intermediate summary TE/EPC List (updated log)updated log s and discussions Your observations/input ! !!! NOT AN EASY EXERCISE !!!

8 R2E Mitigation Project – Status & Outlook July 15 th 2011 Equipment Failures ??? Definition of Failure linked to SEE ??? One or several (ideally all) of the following conditions: Failure occurs during beam-on/ collisions/losses (source of radiation) Failure is not reproducible in the lab Failure signature was already observed during radiation tests (CNRAD and others) Failure frequency increases with higher radiation (hopefully we dont get there)

9 R2E Mitigation Project – Status & Outlook July 15 th 2011 Limitations in Analysis Limitation-1: SEEs which are not SEEs? Limitation-2: Hidden failures ! (not related to SEEs, caused by 3 rd party equipment with indirect impact, e.g. Ethernet Switches)? Limitation-3: High probability to miss those not causing a dump! 9

10 R2E Mitigation Project – Status & Outlook July 15 th 2011 Observed SEE Failures 10 How to Scale to Nominal Operation? Luminosity: P1/5 (x50), P8: (x3-5) Energy: P1/5/7/8: (x1.5) Intensity: P7: Losses & Distribution (x ???) Beam-Gas: P1/5/7/8 + & Scrubbing (x ???) !!! STILL NOT AN EASY EXERCISE !!! Except QPS, only failures leading to dump? G. Spiezia LBOC (link) + Updates (not easy)link

11 R2E Mitigation Project – Status & Outlook July 15 th 2011 Power-Converters & Tolerance Parts have been tested at CNRAD Expected sensitivity ~1x10 -8 (= one failure every ~1x10 8 cm 2 per converter) LHC Observations so far four failures confirmed as SEE (sensitive module: AC/DC part) + few cases of 2 nd failure signature New Test-Area H4IRRAD: LHC-like conditions (spectra) About 1 year of nominal LHC within one week of test Final results after the summer! What will we learn: confirm LHC observations verify weak links and investigate patch-solutions (important for 2012 and 2014/15/16 operation) optimize global mitigation strategy 11 SPS Beam Jura SideNorth Area: Saleve Side Power-Converters are the Key Point for the final R2E Mitigation Strategy

12 R2E Mitigation Project – Status & Outlook July 15 th 2011 What it Means in Reality 12 TEST THIS: HERE BEFORE … AND AFTER … (W)HOW ??? DANGEROUS LIQUID:

13 R2E Mitigation Project – Status & Outlook July 15 th 2011 Equipment Failures Low (weekly) statistics, but correlation visible

14 R2E Mitigation Project – Status & Outlook July 15 th 2011 Roadmap for 2011 Detailed radiation field analysis (Monitoring, TLDs, MD) Additional radiation tests (H4IRRAD, CNRAD) Provision/preparation of mitigation actions xMasBreak (shielding P1, some relocations, preparations) LS1 (shielding P1/5/8, relocations: P1/5/7/8) RadTol Power Converters TS & xMasBreak improvements Additional patch-solutions Evaluation of additional weak points (P4, REs) R2E Review in November 14

15 R2E Mitigation Project – Status & Outlook July 15 th 2011 Conclusion 2011: failures will continue to occur but not limit luminosity reach (patches -> 'shadow' of other problems) Continued testing/monitoring/analysis will allow to optimize R2E mitigation measures R2E Review in November 2012: xMasBreak actions will improve the situation impact of possible 25ns operation? (residual gas densities in the ARC & P4!) 15

16 R2E Mitigation Project – Status & Outlook July 15 th 2011 THANK YOU… 16 Keeping Track of Cables Target & MonitoringPeopleCooling Shielding AND…

17 R2E Mitigation Project – Status & Outlook July 15 th 2011 Backup 17

18 R2E Mitigation Project – Status & Outlook July 15 th 2011 Mitigation Options 18 SHIELDINGRELOCATION CIVIL ENGINEERING RAD-TOL DESIGN No Major CE Improve & Gain TimeSolve & Gain Time Solve & Remain Flexible What Can Be Done (in general)

19 R2E Mitigation Project – Status & Outlook July 15 th 2011 Mitigation Strategy 19 1 st Safety Critical 2 nd Easy Shielding 3 rd Most Sensitive 4 th Remaining Immediate Relocation Fast & Global Improvement Highest Impact on Operation: (1)Relocation (2)Shielding (1)Relocation (2)Shielding (3)New Design

20 R2E Mitigation Project – Status & Outlook July 15 th 2011 IR7 Performed Mitigation Actions Shielding installed: [ECRs: and ] RR73/77 (we gained ~factor 10 in radiation levels) UJ76 (we gained ~factor 10 for safe-room, 3-4 for the 1 st floor) Relocation of UPS from UJ76 (safe) [ECR: ] (safety critical at that time!) Relocation of fire control racks (safe) (possible impact on safety not excluded): UJ76 -> TZ76 [ECR ] Relocation of EN/EL control equipment (safe) RTU relocated from safe room in UJ76 -> TZ76 Relocation of fire detectors (possible impact on safety redundancy): Prepared for UJ76 and RR73/77 (see ECR ) Rack installation & cabling preparations: UJ76 -> TZ76 20

21 R2E Mitigation Project – Status & Outlook July 15 th 2011 Mitigation Actions Already Done Shielding installed: Ducts in P6 (RA63/UA63 and RA67/UA67) (gain ~factor 5-10) UJ22/23 and UJ88/87 (gain ~factor 10) US85 Safe-Room (gain ~factor 10) [ECR: ]ECR: Cryo-relocations/valve replacement in UX85 (safe) Relocation of fire control racks (possible impact on safety): US85, UJ56 [ECR: ] (safe)ECR: Relocation of fire detectors (possible impact on safety): US85 (other points prepared) [ECR: ] (safe)ECR: Relocation of EN/EL control equipment RTU safe room UJ56 (safe) Cabling preparations: P1, P7, P8 21

22 R2E Mitigation Project – Status & Outlook July 15 th 2011 Possible SEE Failures Observed in 2010 TE/EPC power supply burnout in UA87 Same effect observed in CNRAD SEE is very likely the cause (Streaming through Maze) TE/EPC power supply burnout in UA87 Same effect observed in CNRAD SEE is very likely the cause (Streaming through Maze) CRYO tunnel card SEE in 8L2 1 Fault in uFip (as observed in CNRAD 2010) SEE confirmed CRYO tunnel card SEE in 8L2 1 Fault in uFip (as observed in CNRAD 2010) SEE confirmed PXI power supply burnout in UJ16 To be confirmed by producer (comparison with CNRAD burnouts) SEE unlikely (early 2010 operation) PXI power supply burnout in UJ16 To be confirmed by producer (comparison with CNRAD burnouts) SEE unlikely (early 2010 operation) QPS Tunnel Card Failures (2x in 9L7 [ions], 2x in 8R8 [inj.], + others) ISO150 -> permanent PM trigger SEE confirmed (EMC has same effect) QPS Tunnel Card Failures (2x in 9L7 [ions], 2x in 8R8 [inj.], + others) ISO150 -> permanent PM trigger SEE confirmed (EMC has same effect) VAC power supply burn out In UA23 between maze and duct (TDI losses + TCDI losses ) SEE rather unlikely VAC power supply burn out In UA23 between maze and duct (TDI losses + TCDI losses ) SEE rather unlikely WIC crate failure in TI8 Observed in 2009 Known problem with moderate x-section WIC crate failure in TI8 Observed in 2009 Known problem with moderate x-section QPS tunnel Card Failures in 9R7 & 9L7 uFip communication lost (2x) SEE confirmed (seen in CNRAD) QPS tunnel Card Failures in 9R7 & 9L7 uFip communication lost (2x) SEE confirmed (seen in CNRAD) CONFIRMED or very LIKELY NOT CONFIRMED (unlikely) 22

23 R2E Mitigation Project – Status & Outlook July 15 th 2011 Failures 2011 [Mitigation] Collimation Control (3x, confirmed) [Soft + Relocation] Cryogenics UJ14/16/56/76 (several confirmed)[Relocation] Biometry UJ14/16 (2x, likely) [Operation + Rel.?] US85 PLCs (Cryo, 3x, confirmed) [Relocation] Power Converters (4x, TE/EPC) [New Develop.] UPS UJ56/US85?(unlikely, but possible) [Relocation] QPS Control UJ14/16 (few, corrector circuits) [Relocation] QPS ISO-150 (many, tunnel & shielded areas) [Soft + New Develop.] uFIP as used in QPS/Cryo (few times, tunnel + shielded areas) [Soft + New Develop.] Limitation-1: SEEs which are not SEEs? Limitation-2: hidden failures (not related to SEEs, caused by 3 rd party equipment with indirect impact, e.g. Ethernet Switches)? 23

24 R2E Mitigation Project – Status & Outlook July 15 th 2011 Power Converter Failures 24 © TE/EPC

25 R2E Mitigation Project – Status & Outlook July 15 th 2011 Minimize the number of converter types: Only the LHC60A-08V was specified for a radioactive environment ! 3 other converter types are part now of the radioactive sensitive areas! LHC POWER CONVERTERs LHC4..6kA-08V 1-Quadrant 200 Units LHC120A-10V 4-Quadrant 300 Units LHC600A-10V 4-Quadrant 400 Units LHC60A-08V 4-Quadrant 752 Units Units : Quantity in all machine (UA, RR, UJ, tunnel) © V. Montabonnet, Y. Thurel 25

26 R2E Mitigation Project – Status & Outlook July 15 th 2011 IR7 Critical Areas & Equipment 26 Equipment UJ76 Fire/ODH control & detectors Cryogenics Instrumentation (Profibus) AUG controlVacuum UPSBeam Television Monitor Electrical Distribution & ControlRamses Remote-Reset & TimingGSM Diagnostics Access System ControlBeam Loss Monitors Power ConverterBeam Position Monitors (temporary) EthernetOptical Fiber Cooling and VentilationWorldFip Less radiation critical equipment Fire/ODH detectos to be relocated Current Lead Heaters ok for the levels QPS known patch solution Equipment RR73/77 Fire/ODH detectorsBeam Position Monitors Power ConverterCryogenics Instrumentation (FIP) QPSWorldFip Cooling and VentilationCurrent Lead Heaters Power InterlockElectrical Distribution Power Converters – Big Unknown Various critical equipments Several tested at CNGS and shown high radiation sensitivity Few cases allow for patch solutions Global Solution Required Equipment Inventory (EDMS # )EDMS #

27 R2E Mitigation Project – Status & Outlook July 15 th 2011 IR7 Radiation: Today? 27 Combined Loss Analysis (BLMs & Injected/Dumped Intensities): IR3 lost in 2011: ~6E13 protons (per beam) IR7 lost in 2011: ~2E14 protons (per beam) Were a factor of ~50x below nominal (~1x10 16 p/b/y) Can nominal operation lead to relatively higher losses? Latest Weekly Report (www.cern.ch/r2e)www.cern.ch/r2e RR73/77: ~2-3x10 6 cm -2 UJ76: ~1x10 6 cm -2 Nominal Year: RR73/77: ~2x10 8 cm -2 UJ76: ~8x10 7 cm -2 © A. Nordt, A. Thornton Scaling: x75 (Energy!)

28 R2E Mitigation Project – Status & Outlook July 15 th 2011 Collimation Review 28 Performed mitigation options 2011/12 Operation UJ76 relocation Power-converter tests & R&D for RadTol Dev. Betatron collimation in IR3 very efficient not limited by IR7 next step (safety) high-importance to judge for RRs Would provide additional flexibility

29 R2E Mitigation Project – Status & Outlook July 15 th 2011 RRs: Power-Converter R&D TE-EPC Planning for Rad Tolerant Converter Project © Y. Thurel 29 Link: R2E Power Converter R&DR2E Power Converter R&D

30 R2E Mitigation Project – Status & Outlook July 15 th 2011 RRs Additional/Alternative Options Betatron Collimation in IR3 No significant SEE impact for IR3 Low radiation levels in IR7 Additional flexibility Standard collimators to be added R&D for Superconducting Links 30 © A. Ballarino et al. © R. Assmann et al.

31 R2E Mitigation Project – Status & Outlook July 15 th 2011 Summary (Protons) In6.02E+15 Dumped5.82E % Lost in Machine1.99E % Of Lost protons Collisions2.33E % Elsewhere1.76E % LM01LM02LM03 RM05RM04 RM03 RM06 RR77 RadMonDcumRth SEU (3V) Measured Beam contribution SEU (FLUKA) Expected Error [%] Stat. onlyExp./Mes. 6L7.7LM03S B L7.7LM02S B L7.7LM01S B1+B R7.7RM03S B1+B R7.7RM04S B R7.7RM05S B RR77.7RM06S B1+B BLM ratio IR7 / IR3 Ratio % Loss in IR7 TCSG.A6L7.B1 / TCSG.5L3.B TCSG.A6R7.B2 / TCSG.5R3.B IR7 FLUKA Application Benchmark >500m UJ76 TCP TCAP MBW TCS TCLA MQW Loss-Term (SixTrack [ R. Assmann et al. ]) FLUKA Calculations RR73 Assumptions Normalisation © K. Roeed Operation

32 R2E Mitigation Project – Status & Outlook July 15 th 2011 Radiation Levels 2010 Source terms, operational conditions as well as monitor readings have to be carefully evaluated 32 VERY GOOD AGREEMENT (given the underlying uncertainties) FLUKA Predictions Operation Assumptions Rad-Level Estimate Monitor Readings CalibrationAssumptions Final Values Tracking/Be amGas/etc. Threshold of monitors is ~10 6 ! (lower values only by trick [big uncertainties!])

33 R2E Mitigation Project – Status & Outlook July 15 th /2012/Nominal/+++ ??? 2010/2011/2012 Radiation Levels 33 Close to ThresholdCriticalDramatic?!!! Amazing !!!

34 R2E Mitigation Project – Status & Outlook July 15 th 2011 IP8/TI8 Radiation Detectors 5RM05S 5RM06SPATL8711 PMIL8812 5RM07S PMIL8811 5RM08S Current location not known in full detail of the Radmon and RAMSES positions © V. Boccone 34 Large Gradient: 4-5 orders of magnitude

35 R2E Mitigation Project – Status & Outlook July 15 th 2011 TED Loss: RadMon Downstream 35 © V. Boccone

36 R2E Mitigation Project – Status & Outlook July 15 th 2011 R2E Mitigation Project – Status & Outlook July 15 th UJ87: Loss on TCDIH © V. Boccone

37 R2E Mitigation Project – Status & Outlook July 15 th 2011 Point-8 Application Benchmark Detector Measured dose ( Ratio (meas/simu) PMI8501 (UX85) PMI8511 (UX85) PAT8511 (US85) FLUKA/RAMSES benchmark FLUKA/RadMon benchmark DetectorRatio (FLUKA exp/measure) 8LE10S1.6 8LE07S2.0 8LE04S1.6 8LE08S2.2 FLUKA Simulations provide high energy hadron fluence, dose and 1 MeV Si equivalent in the LHCb cavern according to the Phase-2 shielding implementation proposed in the R2E Project UW85 US85 UX85 Very good agreement with PMIs and PATs RAMSES detectors RadMons set at 3V more difficult (at low count rates) Significant uncertainties to be considered (thermal neutron contribution, detector geometry, etc…) Uncertainty at least a factor of 2 © M. Calviani 37


Download ppt "R2E Mitigation Project – Status & Outlook July 15 th 2011 (R2E) Mitigation Project: www.cern.ch/r2e Mini-Chamonix, July 15 th 2011 Radiation To Electronics."

Similar presentations


Ads by Google