may’02, trt workshop jack fowler – duke university sem analysis of radiation test samples at...
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May’02, TRT WorkshopJack Fowler – Duke University
SEM Analysis of RadiationTest Samples atDuke University
Jack Fowler
May’02, TRT WorkshopJack Fowler, Duke HEP
Gas Stream Component Samples
Samples of components and construction materials were placed in a sealed box outside the radiation area with the exit ionization gas passing through
The samples were exposed for ~ 960 hrs
May’02, TRT WorkshopJack Fowler, Duke HEP
Gas Stream Component Samples
The samples were removed and some were stuck together.
Stycast 1266 was sticky Did the glue spread /
evaporate and stick the parts together??
May’02, TRT WorkshopJack Fowler, Duke HEP
Conductive Glue Sample in Outlet Gas Stream
This is the surface as cured of a sample of conductive glue Tra Bond 2902
Visually the surface appeared brown from an unexposed sample.
May’02, TRT WorkshopJack Fowler, Duke HEP
Conductive Glue Sample in Outlet Gas Stream
Notice the large F peak from the analysis of the surface of the epoxy
May’02, TRT WorkshopJack Fowler, Duke HEP
Cross Section of Conductive Glue Sample
May’02, TRT WorkshopJack Fowler, Duke HEP
Cross Section of Conductive Glue Sample
F was only found near the surface of the section
F had penetrated ~ 150m
May’02, TRT WorkshopJack Fowler, Duke HEP
Summary
Samples of Stycast 1266 were tacky after exposure Conductive epoxy Tra Bond 2902 appeared brown after
exposure Many of the small parts were stuck together after exposure None of the other materials were visibly damaged but they were
only observed optically and were not examined under the SEM F deposits were on the surface of the conductive epoxy and found
~150 m below the surface The glass from our flow meter was more frosted than prior to
the start of the run