We just had an alarm that indicated the scattering chamber vacuum pressure had shot up to 0.04 Torr. Beam was off and valves were closed when this happened. Target appeared steady as a rock but so did the high pressure reading. We called MCC and Silviu. It turned out that the gauge controller in the hall needed to be reset. MCC took an access, reset the controller, and all is well. phew.
Figure 1
