Vacuum
An electron beam travelling through air will quickly lose electrons as they collide with air molecules and lose energy or get scattered. To keep the electron beam circulating in the storage ring, the tube they travel in must be kept at a very high vacuum. Try increasing the beam energy and changing the residual pressure to see how this affects the electron beam.
1. Electron Gun > 2. The Linac > 3. Dipole Magnets > 4. Vacuum > 5. Undulator > 6. Beamlines


