The Electron Gun
The electrons used by Diamond begin their journey at the Electron Gun. When metals get very hot they start to lose electrons from the surface through a process called thermionic emission. Normally the electrons simply fall back, so that no net current flows away from the metal surface. When an electric field (a positively charged surface) is brought close to the surface that is emitting electrons, the electrons are attracted away and no longer return to the filament. The stronger the electric field (the more positive the anode is made) the faster the electrons are accelerated away.
1. Electron Gun > 2. The Linac > 3. Dipole Magnets > 4. Vacuum > 5. Undulator > 6. Beamlines
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