4.1 Implementation of Lasers and Measuring Techniques

Purpose of photoinjector drive lasers

A photo injector drive laser provides the photons for generating high-density electron bunches by photo emission at a photocathode located in an injector. Thus the laser controls the temporal structure of the electron bunches accelerated in a linac. Laser development of the MBI in this regard aims at drivers for photo injectors based on Cs₂Te-cathodes. The band gap of this material necessitates a UV-wavelength in the spectral range from ~260 to 270 nm for efficient emission of electrons. This can be reached with the powerful near infrared Neodymium- or Ytterbium-doped solid state laser materials and subsequent frequency conversion stages.

To see how a laser works together with a photo injector click here. (Macromedia Flash needed)