Photocathodes

SLAC utilize a single-strained layer photocathode in order to obtain both high polarization and a quantum efficiency (QE) large enough to provide the charge for the accelerator. The structure of the photocathode appears below.

Structure of the SLAC photocathode

(A larger version is available by clicking the figure).

Polarization and QE graph.

Quantum efficiency and polarization vs. wavelength of the SLAC photocathode.

(A larger version is available by clicking the figure

QE vs. time.

Photocathode lifetime during the time the gun high voltage was off.

(A larger version is available by clicking the figure)


 
 

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This page maintained by Gregory Mulhollan and was last updated 12-7-99.