Diffraction by triangular apertures encodes both magnitude and sign of orbital angular momentum in twisted electron and ion beams, while circular apertures depend only on magnitude.
(5) yieldsz F ∼20–400 mm; beyond this range the pattern is governed primarily by aperture geometry and by the beam’s angular spectrum
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Diffraction by Circular and Triangular Apertures as a Diagnostic Tool of Twisted Matter Waves
Diffraction by triangular apertures encodes both magnitude and sign of orbital angular momentum in twisted electron and ion beams, while circular apertures depend only on magnitude.