Hall D Maintenance Status Long Description

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TASK Primary Contact Secondary Contact PERIOD (days) NEXT MAINTENANCE LAST MAINTENANCE
Pump out Saguaro keithb@jlab.org dallen@jlab.org 360 01/17/24 01/22/23

Check insulating vacuum at Helium Relief Tree and pump down to <1.0 mtorr. 8/28/2019 Pump down insulating vacuum on helium transfer lines to <2.0 mtorr and pump down insulating vacuum on helium tree,nitrogen vent and helium warm return using turbo cart to <.1 mtorr. 10/22/2020 pump down Saquaro , helium transfer lines and U tubes insulating vacuum. 1/20/22 pump down all insulating vacuum lines. 3/22/22 Pump nitrogen insulating vacuum because the outer metal was cold and sweating.