2012/04/29 1930 Fill N2 cold trap full. 2355 Stop 1 K pot pump. Pump mixture into dump. Start warm up. Mechanical Vibrations Induced by 1 K Pot Pump Figure 1: DCRC32 attached to flexible side coax, DCRC33 attached to vacuum side coax: 1 K pot pump on (left); and off (right). Figure 2: DCRC32 attached to flexible side coax, DCRC33 attached to vacuum side coax: Ratio of PSD data for 1K pot pump on/1K pot pump off.