Probing Anomalously High Quantum Efficiency of Self-Healing Gold Photocathodes

Alexandra Boldin

Dr. Eric Montgomery, Blake Riddick

QE and Self-Healing Photocathodes

incident photonsemitted electronsQE

Cesium Auride

Spicer et al., Phys. Rev. 115, 57 (1959).

Khan et al., J. Vac. Sci. Tech. B 30, 031207 (2012).

New Test Chamber

CsAu Quantum Efficiency

Repeat Testing

Conclusion and Future Work

• Designed, built, and commissioned new CsAu QE test stand

• Automated data collection• Ready for self-healing tests• Future: research thermal effects,

determine reasons for QE differences