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GaAs (Cs,O)

Because of the high Q.E. in visible light range and the best performance as a polarized electron source, GaAs photocathodes are used worldwide in DC photoinjectors for large accelerator facilities. A project to apply GaAs in the Rossendorf SRF gun has been started. GaAs(Cs, O) is very demanding, for instance an ultrahigh vacuum of 10-11 mbar is required. For this reason, a new preparation chamber and a new transfer system are under development. The first GaAs(Cs,O) cathode will be produced in 2014.

GaAs (Cs,O)p1


EuCard,  Eucard2


[1]R. Xiang, et al., Polarized Sources, Targets & Polarimetry, published by World Scientific, p249

[2]R. Xiang, et al., Research Activities on Photocathodes for HZDR SRF Gun. Proceedings of IPAC 2012