1. M. Gilchriese Glued Fittings October 5, 2005

2. M. Gilchriese 2 Samples and Prep Three samples using Hysol 9396 Seven samples using Hysol 9394 Surface prep tubes –Sandpaper(600) with alcohol –Wash with alcohol –Wash with acetone Surface prep fitting –Brass wire brush with alcohol –Wash with alcohol –Wash with acetone Irradiate to about 25 MRad (exact value TBD) He leak -> P to 15.5 bar -> He leak -> irradiate -> P to 15.5 bar -> He leak

3. M. Gilchriese 3 Samples After Irradiation Note that epoxy turns blue-like color. No evidence of epoxy running.

4. M. Gilchriese 4 Before/After Comparison Small weight gain Note that did not try to control electrical contact between fittings and pipe. Resistance after. Did not measure before. Change in leak rate not significant. Small change from setup on different days.

5. M. Gilchriese 5 9396 Pictures

6. M. Gilchriese 6 9394 Pictures

7. M. Gilchriese 7 Cross Section 9396 9396 Tube in about Correct Longitudinal position

8. M. Gilchriese 8 Cross Section 9394 9394 Tube not Fully Inserted Big void Glue film

9. M. Gilchriese 9 First Conclusion Promising but need more testing Thermal cycling about to start Will do pressure cycling also Mechanical strength tests to follow, need to define protocol Need more tests in C3F8 not irradiated and irradiated to understand penetration into epoxy. Bulk epoxy samples Assuming all is OK, better control of glue application and assembly. These samples were done in a hurry.