What are the dimensions of the electron beam?
On average the beam is about about the thickness of a business card wide (1/4 mm) and about the thickness of cling film in height (1/60 mm). However, the exact dimensions of the beam vary as it travels around the storage ring, from 87 (horizontal) x 58 (vertical) µm (1 µm = 1/1000 mm) in a bending magnet up to 419 x 30 µm in a long straight section.
