(Jordan V., Gerardo M.)
-Late entry
On Friday we removed and replaced the ion pump for HAM3. We replaced the copper gasket twice, the first gasket seal had a bad leak, it was hard to see the mating surfaces due to visibility issues (laser safety goggles and not enough light).
After installing a second gasket, we started pumping down the annulus system and pressure went down fast. Last pressure reading at the aux-cart was 4.63x10^-05 Torr.
BTW, we have other 4 (four) ion pumps to replace.
EPO taggin'.
(Jordan V., Gerardo M.)
After a couple of days of "assisted" pumping, the annulus system isolation valve was closed. After a day of solo pumping the ion pump was able to maintain the annulus pressure at nominal. Now the aux-cart, can turbo and hoses were removed, pressure looks good.
