Speaker
Description
As accelerators and electron microscopes become more advancement, high-performance photocathodes are required. In particular, CsK$_2$Sb photocathode is of interest because of its low emittance, excitability in visible light, and high quantum efficiency (QE). Two challenges with CsK$_2$Sb photocathodes are (1) the lack of a universal deposition recipe to achieve crystal stoichiometries and (2) their high susceptibility, which restricts their operation pressure to ultrahigh vacuum and leads to a short lifetime and low extraction charge. To resolve these issues, it is essential to understand the elemental compositions of deposited photocathodes and to correlate them to active pressures and lifetimes. Here, we report depth profiles for potassium cesium antimonide photocathodes, investigated using synchrotron radiation x-ray photoelectron spectroscopy, and their active pressures.
Funding Agency
U.S.-Japan Cooperation Program in High Energy Physics,
JSPS KAKENHI Grant Number JP21K17994 (Grant-in-Aid for Young Scientists)
| Region represented | Asia |
|---|---|
| Paper preparation format | Word |
