Thermal emittance measurements of a cesium potassium antimonide   photocathode
  Thermal emittance measurements of a CsK2Sb photocathode at several laser wavelengths are presented. The emittance is obtained with a solenoid scan technique using a high voltage dc photoemission gun. The thermal emittance is 0.56+/-0.03 mm-mrad/mm(rms) at 532 nm wavelength. The results are compared with a simple photoemission model and found to be in a good agreement. 
Ivan Bazarov, Luca Cultrera, Adam Bartnik, Bruce Dunham, Siddharth   Karkare, Yulin Li, Xianghong Liu, Jared Maxson, William...
physics.acc-ph