A spherical mirror-double cylindrical mirror electron spectrometer for simultaneous energy and angular distribution measurements: Design, construction and experiences

The design and construction of a triple-stage electrostatic electron spectrometer are described together with the experiences obtained during the utilization of the equipment in high energy ion-atom collision experiments. The spectrometer (called ESA-21) consists of a spherical (first stage) and a double-pass cylindrical mirror unit. It works in a rather board energy resolution range (from about 5x10-4 to 6x10-3) and a wide electron energy region (from 50 eV to 16 keV) with simultaneous measurement of the energy and the angular distribution (in the region from 0deg to 180deg) of the electrons. (orig.)