This program allows you to control the 2D cross-section of a charged particle beam by applying various magnets, for instance quadrupoles with the left/right arrow keys. Currently set up as a game where the goal is to produce a collider focus (very small beam), at which point "quarks" are produced. Press Q or Escape to quit.
Try it now! - press open/run if the browser prompts you (Windows 8 sometimes requires you to click 'More info' first).