A novel imaging energy filter for cathode lens electron microscopy
2012
Abstract A double spherical deflector energy analyzer with individual deflections π and total deflection 2 π , called α-Spherical Deflector Analyzer (α-SDA), is reported. Its compact design and the “in-column” feature enables simple adaption to surface imaging systems using cathode lenses such as PEEM or LEEM and its contribution to chromatic- and geometrical aberration is negligible. It allows quasi-simultaneous observation of real and reciprocal images by quick switching one of the spherical deflectors on and off.
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