Gerardo, Jordan, Rahul, Richrad, Daniel

We attempted a test mass discharging at 10:45AM. During the preparation everything was working fine with decent ion production. Once we opened the valve to let ionized air into the vacuum the electrometer readback dropped to zero. We stopped at 0.33 Torr. After swapping the controller we concluded that the ionizer probably broke and we needed to replace it with a spare. It is unclear if the injected air was ionized at all, or if the TMDS broke before we opened the valve. In any case, an early SUS measurement indicated that we were unstuck!

We decided to continue with the TMDS swap and run another cycle in the afternoon. This one worked as expected and we stopped at 7.9 Torr. The included docs show the log.