<p>Part I. Papers from the Tenth International Conference on Charged Particle Optics<br>1. Planar multi-reflecting time-of-flight mass-spectrometer of a simple design<br>Seitkerim B. Bimurzaev<br>2. Generalization of paraxial trajectory method for the analysis of non-paraxial rays<br>Shin Fujita<br>3. Test and characterization of a new post-column imaging energy filter<br>Frank Kahl, Volker Gerheim, Martin Linck, Heiko Müller, Richard Schillinger, Stephan Uhlemann<br>4. Electron optics for a multi-pass transmission electron microscope<br>Marian Mankos, Stewart A. Koppell, Brannon B. Klopfer, Thomas Juffmann, Vladimir Kolarik, Khashayar Shadman, Mark Kasevich<br>5. A simulation program for electron mirrors using Boundary Element Method<br>Eric Munro, Haoning Liu, Catherine Rouse, John Rouse<br>6. An algorithm for simulating the geometric optics of charged particle instruments<br>Khashayar Shadman</p> <p>Part II. The Nano-aperture Ion Source<br>7. Introduction to focused ion beams, ion sources, and the nano-aperture ion source<br>Leon van Kouwen<br>8. Nano-fluidic flow in the nano-aperture ion source<br>Leon van Kouwen<br>9. Optics of ion emission from the nano-aperture ion source<br>Leon van Kouwen<br>10. A model for ion-neutral scattering in the nano-aperture source<br>Leon van Kouwen<br>11. Ion emission simulations of the nano-aperture ion source<br>Leon van Kouwen<br>12. Processes in the ionization volume of the nano-aperture ion source<br>Leon van Kouwen</p>