Ssd seu candidates investigation
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SSD SEU Candidates Investigation. All Candidates 2010 - 2013. Measured and Integrated Dose. RAMSES Sensors , but dose given in Sv and not in Rad

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SSD SEU Candidates Investigation

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SSD SEU CandidatesInvestigation


AllCandidates 2010 - 2013


Measured and Integrated Dose

  • RAMSES Sensors, but dose given in Sv and not in Rad

  • No sensorsexatlynearourracks (seenext slide map). The twonearest (on A side) are one on the miniframe (PMIL2513) and one at the edgeof the ALICE Cavern (PMIL2511). Ourracks are in between. Notsureifthere are sensors on I side

  • Twovaluesofmeasured and integrated dose, one per sensor


Measured Dose 2010-2013 (Sv/h) – PMIL2513


Measured Dose 2010-2013 (Sv/h) – PMIL2511


Measured Dose 2010-2013 (Sv/h) – PMIL2513(Zoom)


Measured Dose 2010-2013 (Sv/h) – PMIL2511(Zoom)


Integrated Dose 2010-2013 (Sv) – PMIL2513


Integrated Dose 2010-2013 (Sv) – PMIL2511


DDL 513 – Event 1


DDL 513 – Event 2


DDL 513 – Event 3


DDL 514 – Event 1


DDL 514 – Event 2


DDL 514 – Event 3


DDL 516 – Event 1


DDL 519 – Event 1


DDL 521 – Event 1

The Log entry waswritten at 2.52 am (12/07/2010), butaccordingto the logbook the problemsstarted at leastaround 1 am.


DDL 523 – Event 1


Dose absorbedwhen the SEU happened(PMIL2513 – PM2511)

  • DDL 521: 0.0076 Sv – 0.00055 Sv (this DDL is on I side butthisvalueismeasured on the A side. Notsureifthereis a RAMSES on I side)

  • DDL 514:

    • 1 event: 0.474 Sv – 0.0079 Sv (Probablysolved just with a powercycle)

    • 2 event: 0.606 Sv – 0.0082 Sv (ie 0.132 Sv – 0.0003 Sv wrtevent 1)

    • 3 event: 1.998 Sv – 0.0115 Sv (ie 1.396 Sv – 0.0033 Sv wrtevent 2)

  • DDL 513:

    • 1 event: 1.357 Sv – 0.0108 Sv

    • 2 event: 2.356 Sv – 0.0117 Sv (ie 1.000 Sv – 0.0009 Sv wrtevent 1)

    • 3 event: 3.004 Sv – 0.0124 Sv (ie 0.648 Sv – 0.0007 Sv wrtevent 2)

  • DDL 516: 2,797 Sv – 0.0123 Sv

  • DDL 519: 2.855 Sv – 0.0123 Sv

  • DDL 523: 2.982 Sv – 0.0124 Sv (this DDL is on I side butthisvalueismeasured on the A side. Notsureifthereis a RAMSES on I side)


Total InstantaneousLuminosity


Total InstantaneousLuminosity (Zoom)


Total IntegratedLuminosity


Integrated Dose / IntegratedLuminosity


Conclusions

  • Some casesclearlyassociatedto a peak in the radiationmeasuredappeared just before the event:

    • DDL 513 event 1, DDL 514 events 2 and 3

  • Almostall the othershappenedduring STABLE BEAMS but no evidentpeak in the measured dose wrtimmediatelybefore or after.

  • Whichactionhastobetaken?


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