An example: recovering from a leak in a vacuum joint of the storage ring Action People Time [h] Shutting down the SR 2 1 Removing the SR ceiling Filling the dewar with liquid nitrogen 0.5 Switching off local instrumentation and power supply Moving the pumping stations, dewar and mechanical tools to the SR 1+2 Dismounting/ remounting flanges, replacement of joint Starting vacuum and leak test 1.5 Starting bake-out of ion pumps Bake-out (ion pumps only) 16 Action People Time [h] Switching off the bake-out and cooling 1 2 Discharging the ion pumps, switching on the power supply and instrumentation 1.5 Removing the pumping stations, dewar and mechanical tools from the SR 2+2 Closing the SR ceiling “Searching” operation 0.5 OLAV Workshop CERN, April 11–12 2005 * People external to the vacuum group