Коллиматорный и телескопический режимы катодной линзы.
Авторы
DOI:
https://doi.org/10.31489/2025N4/123-131Ключевые слова:
электронная оптика, электростатическая линза, параксиальная оптика, распределение потенциалаАннотация
Один из способов улучшения характеристик эмиссионных систем (электронных микроскопов, микрофокусных рентгеновских трубок и др.) заключается в снижении аберраций катодной линзы. Такое снижение возможно лишь на основе глубокого теоретического анализа их электронно-оптических схем. В рамках настоящих исследований сделана попытка разработки средств моделирования катодной линзы с практически произвольной конфигурацией электродов в параксиальном приближении, определены условия реализации коллиматорного и телескопического режимов. Изучена взаимосвязь параметров, обеспечивающих указанные режимы работы линзы. Разработаны электронно-оптические схемы, гарантирующие коллиматорный и телескопический режимы катодной линзы реальной (неидеализированной) конструкции.
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