7 Starting Cesium source

This chapter covers the operating principle and step-by-step startup procedure of the Cesium (Cs⁺) primary microbeam ion source from the IMS 7f-Auto Tuning software:

• 7.1 Principle of the Cesium source: Thermal surface ionization mechanism, reservoir heating, ionizer temperature, and motorized mechanical movement.
• 7.2 Starting Cesium source from tuning software: Step-by-step starting process, reservoir heating phases, high voltage validation, and source alignment calibration.