| 1150 | Leak check performed on cold trap 2 flanges, pressure release port and ports to IGH with a background rate of 3.48E-7 mbarl/s. This background rate did not include the fluctuations seen yesterday. No significant leak was detected. Although the background rate did increase to 3.56E-7 mbarl/s during the course of this roughly 10 minute leak check, this was a gradual increase suggesting an overall increase in helium background, and not a sudden jump which usually suggests the presence of a leak. At time a leak test G1=6.3 mabr, G2=682.2 mbar and P1=0.032 mbar. Leak checker left on (but not pumping) in case another leak check must be performed. |