CHE E122 Lecture Notes - Lecture 11: Elemental Analysis, Infrared Spectroscopy, Electron Hole
Document Summary
Charged particles (either electrons or positrons) are accelerated to close to the speed of light. The particles change direction under the influence of powerful magnets. The change of direction results in the emission of a stream of photons (synchrotron radiation) tangential to the orbit of the particles. The charged particles are held in a (generally) circular orbit by an array of magnets, emitting photons as they constantly change direction. The photons emitted are polychromatic, with wavelengths (energies) from infra- red to short wavelength x-rays. Electrons kept in circular path by magnets. Undulators and wigglers are used - they are relatively small magnets with alternating polarity installed in the straight section of the electron orbit to increase brightness even further. Electrons are fired from the linear accelerator. Accelerated close to the speed of light on the booster ring then released into the storage ring. Magnets are used to constantly change electron path as they leave the storage ring.
