Optimization of Spherical Deflecting Analyzer for UTA Neutrino Experiment
Abstract
Spherical analyzers have been widely used in electron spectroscopy due to their high energy resolution. Here we present a way of optimizing the performance of a 90 degree spherical deflecting analyzer(SDA-90) considering finite-source effects, using an imaging matrix formalism. Reasults are shown for both symmetrically and asymmetrically charged cases. The asymmetrical case is found to be superior both in transmission and resolution. This unexpected advantage can be explained by the rotation of the image caused by the broken symmetry along the principle trajectory in the analyzer using an asymmetrical potential configuration. The net effect is equivalent to a reduction in the lateral magnification and a gain in energy dispersion. Both factors improve the performance of the analyzer. The fringe fields, carefully controlled by two Herzog lenses, are very important in the optimization. Implication to UTA neutrino experiment will be discussed.
- Publication:
-
APS Texas Sections Fall Meeting Abstracts
- Pub Date:
- October 1999
- Bibcode:
- 1999APS..TSF.F3303R