Barrel TRT Straw Interior Inspection

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Barrel TRTStraw Interior Inspection

• K. McFarlane
• Hampton University
• DOE/NSF Review, BNL March 2001

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Summary

• The process of gluing in the center wire support
  (CWS) left glue spots in the straw rejection
  rates of 30 were found
• About 700 straws were lost due to excessive glue
• As a result, the CWS procedure was changed, and
  interior inspection begun, using an angioscope
  this continues for all straws.

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Interior Inspection Station
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Some interiors
Clean
Small glue spots
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More interiors
Foreign material?
Twister
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Spot on material
This is as received it is NOT a glue spot
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Conclusions

• Rejection rate 50 straws out of 3,700, not always
  for glue spots
• Interior inspection of straws will continue for
  all straws
• Only the side used for CWS insertion will be
  inspected.