"Photocathode device using diamondoid and cesium bromide films "

William A. Clay: Juan R. Maldonado, Piero Pianetta, Jeremy E. P. Dahl, Robert M. K. Carlson, Peter R. Schreiner, Andrey A. Fokin, Boryslav A. Tkachenko, Nicholas A. Melosh, and Zhi-Xun Shen ; Applied Physics Letters , 12/12/12.

Additional Authors: Juan R. Maldonado, Piero Pianetta, Jeremy E. P. Dahl, Robert M. K. Carlson, Peter R. Schreiner, Andrey A. Fokin, Boryslav A. Tkachenko, Nicholas A. Melosh, and Zhi-Xun Shen

Abstract:

A photocathode structure is presented that shows promise for use in high brightness electron sources. The structure consists of a metal substrate, a monolayer of a diamondoid derivative, and a thin film of cesium bromide. Diamondoid monolayers reduce the energy spread of electron emitters, while cesium bromide increases the yield and stability of cathodes. We demonstrate that the combined structure retains these properties, producing an emitter with lower energy spread than the corresponding cesium bromide emitter (1.06‚ÄČeV versus 1.45‚ÄČeV) and higher yield and stability than un-coated diamondoid emitters.