Ion microscopy with evolutionary-algorithm-based autofocusing

Ion microscopy is an established technique for laser focus diagnostics and the accurate, intensity-resolved measurement of laser ionization processes. In the present feasibility study, we discuss a new ion microscope design, which improves its resolution across a large range of magnifications and simplifies its operation. Instead of the common two einzel lens configuration, which is usually optimized for a fixed magnification, we propose a generic design consisting of an array of equally spaced ring electrodes, whose individually adjustable voltages are controlled by an evolutionary algorithm. In this way, we can realize aberration minimized magnifications between 25 and 100. Moreover, the algorithm can adjust the voltage settings under changing experimental conditions and facilitates autofocusing for user-defined magnification.

Automated summary

Ion microscopy is a well-established technique for laser focus diagnostics and precise measurement of laser ionization processes. This feasibility study presents a new ion microscope design that enhances resolution across a wide range of magnifications and simplifies operation. The proposed design utilizes an array of equally spaced ring electrodes with individually adjustable voltages controlled by an evolutionary algorithm, enabling aberration minimized magnifications between 25 and 100, as well as voltage adjustment for changing experimental conditions and user-defined autofocus.