Abstract
An optimization procedure for the design of an electron spectrum analyzer (ELSA), which consists of the combination of a triple focusing magnet with an energy sensitive detector was developed. The resulting magnet focuses a solid angle of 7.6 msr (5° × 5°) and a momentum band of Δp/ p = 490% ( p max/ p min = 5.9) into a circle with less than 10 mm ⋉, so that small SB-detectors with correspondingly good resolution can be applied. Since ELSA can observe electrons within a wide energy band (e.g. 10–275 keV) and with very low background, it may be a helpful device in scattering experiments such as (e, 2e), (e, eγ) and (e, 2eγ) as well as for conversiom electron measurements.
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