ssd seu candidates investigation
Download
Skip this Video
Download Presentation
SSD SEU Candidates Investigation

Loading in 2 Seconds...

play fullscreen
1 / 26

SSD SEU Candidates Investigation - PowerPoint PPT Presentation


  • 57 Views
  • Uploaded on

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

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' SSD SEU Candidates Investigation' - annora


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
measured and integrated dose
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
ddl 521 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.

dose absorbed when the seu happened pmil2513 pm2511
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)
conclusions
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?
ad