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Intrinsic Emittance of Single Crystal Cathodes

Intrinsic Emittance of Single Crystal Cathodes

Authors :
Karkare, Siddharth
Adhikari, Gowri
Padmore, Howard
Schroeder, Andreas
Publication Year :
2018
Publisher :
JACoW Publishing, Geneva, Switzerland, 2018.

Abstract

The transverse momentum of electrons is conserved during photoemission from atomically ordered surfaces of single crystal materials. Photocathodes used in all photoinjectors today have disordered surfaces and do not exploit this phenomenon. Recently, using this conservation of transverse momentum, significant reduction in intrinsic emittance was demonstrated from the (111) surface of silver*. Here, we present measurements of transverse momentum distributions of electrons photoemitted from the ordered surfaces of Ag and Cu single crystals at several photon energies. These measurements will help in understanding the photoemission process and show how band-structure and the conservation of transverse momentum can be used to obtain further reduction in intrinsic emittance from photocathodes.<br />Proceedings of the 9th Int. Particle Accelerator Conf., IPAC2018, Vancouver, BC, Canada

Details

Language :
English
Database :
OpenAIRE
Accession number :
edsair.doi...........20964a75d786a10a4132db6371c245d4
Full Text :
https://doi.org/10.18429/jacow-ipac2018-thpmf081