abstract:An electrostatic analyzer or ESA is an instrument used in ion optics that employs an electric field to allow the passage of only those ions or electrons that have a given specific energy. It usually also focuses these particles (concentrates them) into a smaller area.
The high resolutionenergyachromaticsystemconsists of an electrostaticanalyzeranda magneticanalyzer, which mass resolution canreach 600 and transmission is betterthan 80%.