Thermo Scientific Apreo User's Operation Manual page 85

E-column: Emitter Startup
This procedure enables electron source switching On / Off. In cases of emergency shut down, it allows starting the
IGP's (Ion Getter Pump) to pump the electron source space.
C O N F I D E N T I A L – limited rights
Revision A Feb 2018
Alignments: E-column: Emitter Startup
User Manual 4-5