Thermal emittance measurements of a cesium potassium antimonide photocathode
Ivan Bazarov, Luca Cultrera, Adam Bartnik, Bruce Dunham, Siddharth, Karkare, Yulin Li, Xianghong Liu, Jared Maxson, William Roussel
TL;DR
This paper reports thermal emittance measurements of a CsK2Sb photocathode at various wavelengths using a solenoid scan technique, showing good agreement with a photoemission model.
Contribution
It provides the first detailed thermal emittance measurements of CsK2Sb photocathodes across multiple wavelengths with a novel measurement approach.
Findings
Thermal emittance at 532 nm is 0.56+/-0.03 mm-mrad/mm(rms).
Measurements agree well with a simple photoemission model.
Abstract
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.
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