Event Title

Session C1: APS, AAPT, and SPS Poster Session - Temperature Dependence of Helium Diffusion Through Common Epoxies

Location

Concourse, Campus Center, University of Massachusetts - Amherst

Event Website

http://blogs.umass.edu/nes2011/

Start Date

18-11-2011 5:40 PM

End Date

18-11-2011 7:00 PM

Description

Helium gas at room temperature is known to diffuse through the epoxies commonly used in various low temperature apparatus, which can complicate leak detection. The helium flux typically decreases with decreasing temperature. We have measured the flux of helium that passes though thin sections of as-cast clear Stycast 1266, Stycast 2850FT (black) and TRA-BOND 2151 (blue) epoxies as a function of temperature in the range 130K < T < 300K. We analyze the data to create normalized (to constant sample thickness and pressure differential) data for comparison. We report the preliminary temperature-dependent fluxes we have measured, which show significant differences among the epoxies studied.

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Nov 18th, 5:40 PM Nov 18th, 7:00 PM

Session C1: APS, AAPT, and SPS Poster Session - Temperature Dependence of Helium Diffusion Through Common Epoxies

Concourse, Campus Center, University of Massachusetts - Amherst

Helium gas at room temperature is known to diffuse through the epoxies commonly used in various low temperature apparatus, which can complicate leak detection. The helium flux typically decreases with decreasing temperature. We have measured the flux of helium that passes though thin sections of as-cast clear Stycast 1266, Stycast 2850FT (black) and TRA-BOND 2151 (blue) epoxies as a function of temperature in the range 130K < T < 300K. We analyze the data to create normalized (to constant sample thickness and pressure differential) data for comparison. We report the preliminary temperature-dependent fluxes we have measured, which show significant differences among the epoxies studied.

http://scholarworks.umass.edu/climate_nuclearpower/2011/nov18/29