1. May’02, TRT Workshop Jack Fowler – Duke University SEM Analysis of Radiation Test Samples at Duke University Jack Fowler

2. May’02, TRT Workshop Jack 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

3. May’02, TRT Workshop Jack 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??

4. May’02, TRT Workshop Jack 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.

5. May’02, TRT Workshop Jack Fowler, Duke HEP Conductive Glue Sample in Outlet Gas Stream  Notice the large F peak from the analysis of the surface of the epoxy

6. May’02, TRT Workshop Jack Fowler, Duke HEP Cross Section of Conductive Glue Sample

7. May’02, TRT Workshop Jack Fowler, Duke HEP Cross Section of Conductive Glue Sample  F was only found near the surface of the section  F had penetrated ~ 150  m

8. May’02, TRT Workshop Jack 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