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Fringing field optimization of hemispherical deflector analyzers using BEM and FDM |
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| Authors: | Omer Sise Melike Ulu Mevlut Dogan Genoveva Martinez Theo JM Zouros |
| Institution: | 1. Department of Physics, Science and Arts Faculty, Afyon Kocatepe University, 03200 Afyonkarahisar, Turkey;2. Department Fisica Aplicada III, Fac. de Fisica, UCM 28040-Madrid, Spain;3. Department of Physics, University of Crete, P.O. Box 2208, 71003 Heraklion, Crete, Greece;4. TANDEM Accelerator Laboratory, Institute of Nuclear Physics, NCSR “Demokritos”, 153.10 Aghia Paraskevi, Athens, Greece |
| Abstract: | In this paper we present numerical modeling results for fringing field optimization of hemispherical deflector analyzers (HDAs), simulated using boundary-element and finite-difference numerical methods. Optimization of the fringing field aberrations of HDAs is performed by using a biased optical axis and an optimized entry position offset (paracentric) from the center position used in conventional HDAs. The described optimization achieves first-order focusing thus also further improving the energy resolution of HDAs. |
| Keywords: | 41 85 Qg 41 85 Ja |
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